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list | update_date
timestamp[s] | authors_parsed
sequence |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0707.0030 | John F. Gunion | Hsin-Chia Cheng, John F. Gunion, Zhenyu Han, Guido Marandella, and Bob
McElrath | Mass Determination in SUSY-like Events with Missing Energy | 41 pages, 14 figures, various clarifications and expanded discussion
included in revised version that conforms to the version to be published | JHEP 0712:076,2007 | 10.1088/1126-6708/2007/12/076 | null | hep-ph astro-ph hep-ex | null | We describe a kinematic method which is capable of determining the overall
mass scale in SUSY-like events at a hadron collider with two missing (dark
matter) particles. We focus on the kinematic topology in which a pair of
identical particles is produced with each decaying to two leptons and an
invisible particle (schematically, $pp\to YY+jets$ followed by each $Y$
decaying via $Y\to \ell X\to \ell\ell'N$ where $N$ is invisible). This topology
arises in many SUSY processes such as squark and gluino production and decay,
not to mention $t\anti t$ di-lepton decays. In the example where the final
state leptons are all muons, our errors on the masses of the particles $Y$, $X$
and $N$ in the decay chain range from 4 GeV for 2000 events after cuts to 13
GeV for 400 events after cuts. Errors for mass differences are much smaller.
Our ability to determine masses comes from considering all the kinematic
information in the event, including the missing momentum, in conjunction with
the quadratic constraints that arise from the $Y$, $X$ and $N$ mass-shell
conditions. Realistic missing momentum and lepton momenta uncertainties are
included in the analysis.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 06:10:58 GMT"
},
{
"version": "v2",
"created": "Thu, 6 Dec 2007 20:27:59 GMT"
}
] | 2011-01-13T00:00:00 | [
[
"Cheng",
"Hsin-Chia",
""
],
[
"Gunion",
"John F.",
""
],
[
"Han",
"Zhenyu",
""
],
[
"Marandella",
"Guido",
""
],
[
"McElrath",
"Bob",
""
]
] |
0707.0031 | Shannon Starr | Shannon Starr and Brigitta Vermesi | Some Observations for Mean-Field Spin Glass Models | 15 pages, minor revisions | Lett. Math. Phys., 83 (2008) 281--303. | 10.1007/s11005-008-0224-0 | null | math-ph math.MP | null | We obtain bounds to show that the pressure of a two-body, mean-field spin
glass is a Lipschitz function of the underlying distribution of the random
coupling constants, with respect to a particular semi-norm. This allows us to
re-derive a result of Carmona and Hu, on the universality of the SK model, by a
different proof, and to generalize this result to the Viana-Bray model. We also
prove another bound, suitable when the coupling constants are not independent,
which is what is necessary if one wants to consider ``canonical'' instead of
``grand canonical'' versions of the SK and Viana-Bray models. Finally, we
review Viana-Bray type models, using the language of L\'evy processes, which is
natural in this context.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 14:54:55 GMT"
},
{
"version": "v2",
"created": "Sun, 23 Dec 2007 23:17:49 GMT"
}
] | 2008-03-06T00:00:00 | [
[
"Starr",
"Shannon",
""
],
[
"Vermesi",
"Brigitta",
""
]
] |
0707.0032 | Dimitar Jetchev | Dimitar Jetchev, Kristin Lauter, William Stein | Explicit Heegner Points: Kolyvagin's Conjecture and Non-trivial Elements
in the Shafarevich-Tate Group | 20 pages | null | null | null | math.NT | null | Kolyvagin used Heegner points to associate a system of cohomology classes to
an elliptic curve over $\Q$ and conjectured that the system contains a
non-trivial class. His conjecture has profound implications on the structure of
Selmer groups. We provide new computational and theoretical evidence for
Kolyvagin's conjecture. More precisely, we explicitly compute Heegner points
over ring class fields and use these points to verify the conjecture for
specific elliptic curves of rank two. We explain how Kolyvagin's conjecture
implies that if the analytic rank of an elliptic curve is at least two then the
$\Z_p$-corank of the corresponding Selmer group is at least two as well. We
also use explicitly computed Heegner points to produce non-trivial classes in
the Shafarevich-Tate group.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 01:42:00 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Jetchev",
"Dimitar",
""
],
[
"Lauter",
"Kristin",
""
],
[
"Stein",
"William",
""
]
] |
0707.0033 | Xi-Ping Zhu | Hui-Ling Gu and Xi-Ping Zhu | The Existence of Type II Singularities for the Ricci Flow on $S^{n+1}$ | 28 pages | null | null | null | math.DG math.AP | null | In this paper we prove the existence of Type II singularities for the Ricci
flow on $S^{n+1}$ for all $n\geq 2$.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 01:55:31 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Gu",
"Hui-Ling",
""
],
[
"Zhu",
"Xi-Ping",
""
]
] |
0707.0034 | Xi-Ping Zhu | Hui-Ling Gu | Manifolds with Pointwise Ricci Pinched Curvature | 16 pages | null | null | null | math.DG | null | In this paper, we proved a compactness result about Riemannian manifolds with
an arbitrary pointwisely pinched Ricci curvature tensor.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 02:04:10 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Gu",
"Hui-Ling",
""
]
] |
0707.0035 | Xi-Ping Zhu | Hui-Ling Gu | A Simple Proof for the Generalized Frankel Conjecture | 9 pages | null | null | null | math.DG | null | In this short paper, we will give a simple and transcendental proof for Mok's
theorem of the generalized Frankel conjecture. This work is based on the
maximum principle in \cite{BS2} proposed by Brendle and Schoen.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 02:09:44 GMT"
},
{
"version": "v2",
"created": "Sat, 18 Aug 2007 01:35:12 GMT"
}
] | 2011-11-10T00:00:00 | [
[
"Gu",
"Hui-Ling",
""
]
] |
0707.0036 | A. G. Kofman | Abraham G. Kofman and Alexander N. Korotkov | Analysis of Bell inequality violation in superconducting qubits | 16 pages, 3 figures | Phys. Rev. B 77, 104502 (2008) | 10.1103/PhysRevB.77.104502 | null | cond-mat.supr-con quant-ph | null | We analyze conditions for violation of the Bell inequality in the
Clauser-Horne-Shimony-Holt form, focusing on the Josephson phase qubits. We
start the analysis with maximum violation in the ideal case, and then take into
account the effects of the local measurement errors and decoherence. A special
attention is paid to configurations of the qubit measurement directions in the
pseudospin space lying within either horizontal or vertical planes; these
configurations are optimal in certain cases. Besides local measurement errors
and decoherence, we also discuss the effect of measurement crosstalk, which
affects both the classical inequality and the quantum result. In particular, we
propose a version of the Bell inequality which is insensitive to the crosstalk.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 03:01:28 GMT"
},
{
"version": "v2",
"created": "Wed, 9 Jan 2008 02:37:00 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Kofman",
"Abraham G.",
""
],
[
"Korotkov",
"Alexander N.",
""
]
] |
0707.0037 | Grover Swartzlander Jr. | Grover A. Swartzlander, Jr. and Raul I. Hernandez-Aranda | Optical Rankine Vortex | 10 pages, 5 figures, | null | null | null | physics.optics | null | Rankine vortex charateristics of a partially coherent optical vortex are
explored using classical and physical optics. Unlike a perfectly coherent
vortex mode, the circulation is not quantized. Excess circulation is predicted
owing to the wave nature of the composite vortex fields. Based on these
findings we propose a vortex stellar interferometer.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 02:33:47 GMT"
}
] | 2012-08-27T00:00:00 | [
[
"Swartzlander,",
"Grover A.",
"Jr."
],
[
"Hernandez-Aranda",
"Raul I.",
""
]
] |
0707.0038 | Ralf Schiffler | Ibrahim Assem, Thomas Bruestle, Ralf Schiffler | Cluster-tilted algebras and slices | 21 pages, 3 figures, minor corrections, typos fixed | null | null | null | math.RT math.RA | null | We give a criterion allowing to verify whether or not two tilted algebras
have the same relation-extension (thus correspond to the same cluster-tilted
algebra). This criterion is in terms of a combinatorial configuration in the
Auslander-Reiten quiver of the cluster-tilted algebra, which we call local
slice.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 02:35:32 GMT"
},
{
"version": "v2",
"created": "Fri, 6 Jul 2007 18:52:44 GMT"
}
] | 2011-11-10T00:00:00 | [
[
"Assem",
"Ibrahim",
""
],
[
"Bruestle",
"Thomas",
""
],
[
"Schiffler",
"Ralf",
""
]
] |
0707.0039 | Shuji Matsuura | Shuji Matsuura, Mai Shirahata, Mitsunobu Kawada, Yasuo Doi, Takao
Nakagawa, Hiroshi Shibai, Chris P. Pearson, Toshinobu Takagi, Woong-Seob
Jeong, Shinki Oyabu and Hideo Matsuhara | AKARI Far-Infrared Source Counts in the Lockman Hole | 25 pages, 8 figures, Publications of the Astronomical Society of
Japan, in press | null | 10.1093/pasj/59.sp2.S503 | null | astro-ph | null | We report initial results of far-infrared observations of the Lockman hole
with Far-Infrared Surveyor (FIS) onboard the AKARI infrared satellite. On the
basis of slow scan observations of a 0.6 deg x 1.2 deg contiguous area, we
obtained source number counts at 65, 90 and 140 um down to 77, 26 and 194 mJy
(3 sigma), respectively. The counts at 65 and 140 um show good agreement with
the Spitzer results. However, our 90 um counts are clearly lower than the
predicted counts by recent evolutionary models that fit the Spitzer counts in
all the MIPS bands. Our 90 um counts above 26 mJy account for about 7% of the
cosmic background. These results provide strong constraints on the evolutionary
scenario and suggest that the current models may require modifications.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 03:22:57 GMT"
}
] | 2015-05-13T00:00:00 | [
[
"Matsuura",
"Shuji",
""
],
[
"Shirahata",
"Mai",
""
],
[
"Kawada",
"Mitsunobu",
""
],
[
"Doi",
"Yasuo",
""
],
[
"Nakagawa",
"Takao",
""
],
[
"Shibai",
"Hiroshi",
""
],
[
"Pearson",
"Chris P.",
""
],
[
"Takagi",
"Toshinobu",
""
],
[
"Jeong",
"Woong-Seob",
""
],
[
"Oyabu",
"Shinki",
""
],
[
"Matsuhara",
"Hideo",
""
]
] |
0707.0040 | Damian Swift | Damian C. Swift, Achim Seifter, David B. Holtkamp, Vincent W. Yuan,
David Bowman, David A. Clark | Explanation for Anomalous Shock Temperatures Measured by Neutron
Resonance Spectroscopy | near-final version, waiting for final consent from an author | Physical Review B, vol. 77, no. 9, 092102 (2008) | 10.1103/PhysRevB.77.092102 | LA-UR-07-1981 | cond-mat.other cond-mat.mtrl-sci | null | Neutron resonance spectrometry (NRS) has been used to measure the temperature
inside Mo samples during shock loading. The temperatures obtained were
significantly higher than predicted assuming ideal hydrodynamic loading. The
effect of plastic flow and non-ideal projectile behavior were assessed. Plastic
flow was calculated self-consistently with the shock jump conditions: this is
necessary for a rigorous estimate of the locus of shock states accessible.
Plastic flow was estimated to contribute a temperature rise of 53K compared
with hydrodynamic flow. Simulations were performed of the operation of the
explosively-driven projectile system used to induce the shock in the Mo sample.
The simulations predicted that the projectile was significantly curved on
impact, and still accelerating. The resulting spatial variations in load,
including radial components of velocity, were predicted to increase the
apparent temperature that would be deduced from the width of the neutron
resonance by 160K. These corrections are sufficient to reconcile the apparent
temperatures deduced using NRS with the accepted properties of Mo, in
particular its equation of state.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 04:27:02 GMT"
}
] | 2008-03-06T00:00:00 | [
[
"Swift",
"Damian C.",
""
],
[
"Seifter",
"Achim",
""
],
[
"Holtkamp",
"David B.",
""
],
[
"Yuan",
"Vincent W.",
""
],
[
"Bowman",
"David",
""
],
[
"Clark",
"David A.",
""
]
] |
0707.0041 | M.S. Santhanam | M. S. Santhanam, V. B. Sheorey and Arul Lakshminarayan | Classical bifurcations and entanglement in smooth Hamiltonian system | 7 pages, 6 figures | Phys. Rev. E 77, 026213 (2008). | 10.1103/PhysRevE.77.026213 | IITM/PH/TH/2007/6 | nlin.CD quant-ph | null | We study entanglement in two coupled quartic oscillators. It is shown that
the entanglement, as measured by the von Neumann entropy, increases with the
classical chaos parameter for generic chaotic eigenstates. We consider certain
isolated periodic orbits whose bifurcation sequence affects a class of quantum
eigenstates, called the channel localized states. For these states, the
entanglement is a local minima in the vicinity of a pitchfork bifurcation but
is a local maxima near a anti-pitchfork bifurcation. We place these results in
the context of the close connections that may exist between entanglement
measures and conventional measures of localization that have been much studied
in quantum chaos and elsewhere. We also point to an interesting near-degeneracy
that arises in the spectrum of reduced density matrices of certain states as an
interplay of localization and symmetry.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 04:34:45 GMT"
}
] | 2008-02-22T00:00:00 | [
[
"Santhanam",
"M. S.",
""
],
[
"Sheorey",
"V. B.",
""
],
[
"Lakshminarayan",
"Arul",
""
]
] |
0707.0042 | Karthik Shankar | Karthik Shankar and Bernard F. Whiting | Self force of a static electric charge near a Schwarzschild Star | 11 pages, 2 figures | Phys.Rev.D76:124027,2007 | 10.1103/PhysRevD.76.124027 | null | gr-qc | null | When a charge is held static near a constant density spherical star, it
experiences a self-force which is significantly different from the force it
would experience when placed near a black hole of the same mass. In this paper,
an expression for the self-force (as measured by a locally inertial observer)
is given %explicitly calculated for an insulating Schwarzschild star, and the
result is explicitly computed for the extreme density case, which has a
singularity at its center. The force is found to be repulsive. A similar
calculation of the self-force is also performed for a conducting star. This
calculation is valid for any static, spherically conducting star, since the
result is independent of the interior metric. When the charge is placed very
close to the conducting star, the force is found to be attractive but when the
charge is placed beyond a certain distance (2.95M for a conducting star of
radius 2.25M), the force is found to be repulsive. When the charge is placed
very far from the star (be it conducting or insulating), the charge experiences
the same repulsive force it would experience when placed in the spacetime of a
black hole with the same mass as the star.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 04:38:30 GMT"
},
{
"version": "v2",
"created": "Tue, 6 Nov 2007 12:57:22 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Shankar",
"Karthik",
""
],
[
"Whiting",
"Bernard F.",
""
]
] |
0707.0043 | Nobuki Takayama | Nobuki Takayama | Modified A-hypergeometric Systems | 8 pages | null | null | null | math.CA math.AG | null | We will introduce a modified system of A-hypergeometric system (GKZ system)
by applying a change of variables for Groebner deformations and study its
Groebner basis and the indicial polynomials along the "exceptional
hypersurface".
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 05:15:45 GMT"
},
{
"version": "v2",
"created": "Sun, 20 Jan 2008 06:38:58 GMT"
}
] | 2008-01-20T00:00:00 | [
[
"Takayama",
"Nobuki",
""
]
] |
0707.0044 | Alexander E. Shalyt-Margolin | A.E. Shalyt-Margolin, V.I. Strazhev and A.Ya. Tregubovich | Application of Geometric Phase in Quantum Computations | 27 pages,minor corrections. This article is dedicated to memory of
our dear friend, colleague and co-author Dr. Artur Tregubovich | Computer Science and Quantum Computing, p.p.125-149, Nova Science
Publishers 2007 | null | null | quant-ph | null | Geometric phase that manifests itself in number of optic and nuclear
experiments is shown to be a useful tool for realization of quantum
computations in so called holonomic quantum computer model (HQCM). This model
is considered as an externally driven quantum system with adiabatic evolution
law and finite number of the energy levels. The corresponding evolution
operators represent quantum gates of HQCM. The explicit expression for the
gates is derived both for one-qubit and for multi-qubit quantum gates as
Abelian and non-Abelian geometric phases provided the energy levels to be
time-independent or in other words for rotational adiabatic evolution of the
system. Application of non-adiabatic geometric-like phases in quantum
computations is also discussed for a Caldeira-Legett-type model (one-qubit
gates) and for the spin 3/2 quadrupole NMR model (two-qubit gates). Generic
quantum gates for these two models are derived. The possibility of construction
of the universal quantum gates in both cases is shown.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 05:33:33 GMT"
},
{
"version": "v2",
"created": "Wed, 4 Jul 2007 09:12:52 GMT"
}
] | 2007-07-04T00:00:00 | [
[
"Shalyt-Margolin",
"A. E.",
""
],
[
"Strazhev",
"V. I.",
""
],
[
"Tregubovich",
"A. Ya.",
""
]
] |
0707.0045 | Olivier Lafitte | Olivier Lafitte (LAGA, Cea/List) | The linear and non linear Rayleigh-Taylor instability for the quasi
isobaric profile | null | null | 10.1016/j.physd.2008.03.017 | null | math.AP | null | We study the stability of the system of the Euler equation in the
neighborhood of a stationary profile associated with the quasi isobaric model
in a gravity field. This stationary profile is not bounded below, hence the
operator is not coercive. We use this linear result to deduce a nonlinear
result
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 05:48:27 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Lafitte",
"Olivier",
"",
"LAGA, Cea/List"
]
] |
0707.0046 | Ulrich Bunke | Ulrich Bunke (Regensburg) and Thomas Schick (Georg-August-Universitaet
Goettingen) | Smooth K-Theory | v4 93 pages, version to appear in Asterisque (Bismut 60 proceedings) | Ast\'erisque 328 (2009), 45-135 | null | null | math.KT math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct an analytic multiplicative model of smooth K-theory. We further
introduce the notion of a smooth K-orientation of a proper submersion and
define the associated push-forward which satisfies functoriality, compatibility
with pull-back diagrams, and projection and bordism formulas. We construct a
multiplicative lift of the Chern character from smooth K-theory to smooth
rational cohomology and verify that the cohomological version of the
Atiyah-Singer index theorem for families lifts to smooth cohomology.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 07:03:25 GMT"
},
{
"version": "v2",
"created": "Fri, 23 May 2008 12:17:45 GMT"
},
{
"version": "v3",
"created": "Sat, 14 Mar 2009 13:52:38 GMT"
},
{
"version": "v4",
"created": "Sat, 16 May 2009 22:23:09 GMT"
}
] | 2010-09-13T00:00:00 | [
[
"Bunke",
"Ulrich",
"",
"Regensburg"
],
[
"Schick",
"Thomas",
"",
"Georg-August-Universitaet\n Goettingen"
]
] |
0707.0047 | Seiki Nishikawa | Itaru Mitoma and Seiki Nishikawa | Asymptotic Expansion of the One-Loop Approximation of the Chern-Simons
Integral in an Abstract Wiener Space Setting | 39 pages | null | null | null | math.DG math.PR | null | In an abstract Wiener space setting, we constract a rigorous mathematical
model of the one-loop approximation of the perturbative Chern-Simons integral,
and derive its explicit asymptotic expansion for stochastic Wilson lines.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 08:00:13 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Mitoma",
"Itaru",
""
],
[
"Nishikawa",
"Seiki",
""
]
] |
0707.0048 | Matthew R. James | J. Gough and M.R. James | The Series Product and Its Application to Quantum Feedforward and
Feedback Networks | To appear, IEEE Transactions on Automatic Control, 2009 | null | null | null | quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The purpose of this paper is to present simple and general algebraic methods
for describing series connections in quantum networks. These methods build on
and generalize existing methods for series (or cascade) connections by allowing
for more general interfaces, and by introducing an efficient algebraic tool,
the series product. We also introduce another product, which we call the
concatenation product, that is useful for assembling and representing systems
without necessarily having connections. We show how the concatenation and
series products can be used to describe feedforward and feedback networks. A
selection of examples from the quantum control literature are analyzed to
illustrate the utility of our network modeling methodology.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 09:10:32 GMT"
},
{
"version": "v2",
"created": "Thu, 13 Mar 2008 00:41:45 GMT"
},
{
"version": "v3",
"created": "Thu, 9 Apr 2009 01:30:17 GMT"
}
] | 2009-04-09T00:00:00 | [
[
"Gough",
"J.",
""
],
[
"James",
"M. R.",
""
]
] |
0707.0049 | Anton Kuzyk | Anton Kuzyk, Mika Pettersson, J. Jussi Toppari, Tommi K. Hakala, Hanna
Tikkanen, Henrik Kunttu, Paivi Torma | Molecular coupling of light with plasmonic waveguides | 9 pages, 5 figures | Optics Express, Vol. 15, Issue 16, pp. 9908-9917, 2007 | 10.1364/OE.15.009908 | null | physics.optics physics.chem-ph | null | We use molecules to couple light into and out of microscale plasmonic
waveguides. Energy transfer, mediated by surface plasmons, from donor molecules
to acceptor molecules over ten micrometer distances is demonstrated. Also
surface plasmon coupled emission from the donor molecules is observed at
similar distances away from the excitation spot. The lithographic fabrication
method we use for positioning the dye molecules allows scaling to nanometer
dimensions. The use of molecules as couplers between far-field and near-field
light offers the advantages that no special excitation geometry is needed, any
light source can be used to excite plasmons and the excitation can be localized
below the diffraction limit. Moreover, the use of molecules has the potential
for integration with molecular electronics and for the use of molecular
self-assembly in fabrication. Our results constitute a proof-of-principle
demonstration of a plasmonic waveguide where signal in- and outcoupling is done
by molecules.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 09:40:23 GMT"
},
{
"version": "v2",
"created": "Mon, 23 Jul 2007 19:50:46 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Kuzyk",
"Anton",
""
],
[
"Pettersson",
"Mika",
""
],
[
"Toppari",
"J. Jussi",
""
],
[
"Hakala",
"Tommi K.",
""
],
[
"Tikkanen",
"Hanna",
""
],
[
"Kunttu",
"Henrik",
""
],
[
"Torma",
"Paivi",
""
]
] |
0707.0050 | Nicolas Bonneau | Nicolas Bonneau, M\'erouane Debbah, Eitan Altman, Are Hj{\o}rungnes | Non-atomic Games for Multi-User Systems | 17 pages, 4 figures, submitted to IEEE JSAC Special Issue on ``Game
Theory in Communication Systems'' | null | 10.1109/JSAC.2008.080903 | null | cs.IT cs.GT math.IT | null | In this contribution, the performance of a multi-user system is analyzed in
the context of frequency selective fading channels. Using game theoretic tools,
a useful framework is provided in order to determine the optimal power
allocation when users know only their own channel (while perfect channel state
information is assumed at the base station). We consider the realistic case of
frequency selective channels for uplink CDMA. This scenario illustrates the
case of decentralized schemes, where limited information on the network is
available at the terminal. Various receivers are considered, namely the Matched
filter, the MMSE filter and the optimum filter. The goal of this paper is to
derive simple expressions for the non-cooperative Nash equilibrium as the
number of mobiles becomes large and the spreading length increases. To that end
two asymptotic methodologies are combined. The first is asymptotic random
matrix theory which allows us to obtain explicit expressions of the impact of
all other mobiles on any given tagged mobile. The second is the theory of
non-atomic games which computes good approximations of the Nash equilibrium as
the number of mobiles grows.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 09:53:16 GMT"
}
] | 2016-11-18T00:00:00 | [
[
"Bonneau",
"Nicolas",
""
],
[
"Debbah",
"Mérouane",
""
],
[
"Altman",
"Eitan",
""
],
[
"Hjørungnes",
"Are",
""
]
] |
0707.0051 | Nikolay Volchanskiy | G. Vereshkov and N. Volchanskiy | Q^2-evolution of nucleon-to-resonance transition form factors in a
QCD-inspired vector-meson-dominance model | 22 pages, 22 PS figures, REVTeX 4; v2: +3 refs, minor editorial
changes | Phys.Rev.D76:073007,2007 | 10.1103/PhysRevD.76.073007 | null | hep-ph nucl-th | null | We adopt the vector-meson-dominance approach to investigate Q^2-evolution of
N-R transition form factors (N denotes nucleon and R an excited resonance) in
the first and second resonance regions. The developed model is based upon
conventional NR\gamma-interaction Lagrangians, introducing three form factors
for spin-3/2 resonances and two form factors for spin-1/2 nucleon excitations.
Lagrangian form factors are expressed as dispersionlike expansions with four or
five poles corresponding to the lowest excitations of the mesons \rho(770) and
\omega(782). Correct high-Q^2 form factor behavior predicted by perturbative
QCD is due to phenomenological logarithmic renormalization of electromagnetic
coupling constants and linear superconvergence relations between the parameters
of the meson spectrum. The model is found to be in good agreement with all the
experimental data on Q^2-dependence of the transitions N-\Delta(1232),
N-N(1440), N-N(1520), N-N(1535). We present fit results and model predictions
for high-energy experiments proposed by JLab. Besides, we make special emphasis
on the transition to perturbative domain of N-\Delta(1232) form factors.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 10:05:47 GMT"
},
{
"version": "v2",
"created": "Thu, 18 Oct 2007 14:04:12 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Vereshkov",
"G.",
""
],
[
"Volchanskiy",
"N.",
""
]
] |
0707.0052 | Domenico Seminara | Gianluca Grignani (Perugia U., INFN), Luca Griguolo (Parma U., INFN),
Nicola Mori (Firenze U., INFN) and Domenico Seminara (Firenze U., INFN) | Thermodynamics of theories with sixteen supercharges in non-trivial
vacua | 66 pages, 7 figure eps, References added and minor changes | JHEP 0710:068,2007 | 10.1088/1126-6708/2007/10/068 | null | hep-th | null | We study the thermodynamics of maximally supersymmetric U(N) Yang-Mills
theory on $\mathds{R}\times S^2$ at large $N$. The model arises as a consistent
truncation of ${\cal N}=4$ super Yang-Mills on $\mathds{R}\times S^3$ and as
the continuum limit of the plane-wave matrix model expanded around the $N$
spherical membrane vacuum. The theory has an infinite number of classical BPS
vacua, labeled by a set of monopole numbers, described by dual supergravity
solutions. We first derive the Lagrangian and its supersymmetry transformations
as a deformation of the usual dimensional reduction of ${\cal N}=1$ gauge
theory in ten dimensions. Then we compute the partition function in the zero 't
Hooft coupling limit in different monopole backgrounds and with chemical
potentials for the $R$-charges. In the trivial vacuum we observe a first-order
Hagedorn transition separating a phase in which the Polyakov loop has vanishing
expectation value from a regime in which this order parameter is non-zero, in
analogy with the four-dimensional case. The picture changes in the monopole
vacua due to the structure of the fermionic effective action. Depending on the
regularization procedure used in the path integral, we obtain two completely
different behaviors, triggered by the absence or the appearance of a
Chern-Simons term. In the first case we still observe a first-order phase
transition, with Hagedorn temperature depending on the monopole charges. In the
latter the large $N$ behavior is obtained by solving a unitary multi-matrix
model with a peculiar logarithmic potential, the system does not present a
phase transition and it always appears in a ``deconfined'' phase.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 10:15:29 GMT"
},
{
"version": "v2",
"created": "Mon, 16 Jul 2007 14:16:10 GMT"
}
] | 2009-04-30T00:00:00 | [
[
"Grignani",
"Gianluca",
"",
"Perugia U., INFN"
],
[
"Griguolo",
"Luca",
"",
"Parma U., INFN"
],
[
"Mori",
"Nicola",
"",
"Firenze U., INFN"
],
[
"Seminara",
"Domenico",
"",
"Firenze U., INFN"
]
] |
0707.0053 | Mehedi Kalam Dr. | M.Kalam, F.Rahaman and S.Mondal | Particle Motion Around Tachyon Monopole | 14 pages, 7 figures | Gen.Rel.Grav.40:1849-1861,2008 | 10.1007/s10714-008-0605-9 | null | gr-qc | null | Recently, Li and Liu have studied global monoole of tachyon in a four
dimensional static space-time. We analyze the motion of massless and massive
particles around tachyon monopole. Interestingly, for the bending of light rays
due to tachyon monopole instead of getting angle of deficit we find angle of
surplus. Also we find that the tachyon monopole exerts an attractive
gravitational force towards matter.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 10:26:07 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Kalam",
"M.",
""
],
[
"Rahaman",
"F.",
""
],
[
"Mondal",
"S.",
""
]
] |
0707.0054 | Bj\"orn B\"auchle | Bjoern Baeuchle, Horst Stoecker, Laszlo Csernai | Mach Cones at central LHC Collisions via MACE | 3 pages, 2 figures. Contributed to the Workshop on Heavy Ion
Collisions at the LHC: Last Call for Predictions, Geneva, Switzerland, 14 May
- 8 Jun 2007. Added three-particle correlation figure | null | null | null | nucl-th | null | The shape of Mach Cones in central lead on lead collisions at $\sqrt{s_{NN}}
= 5.5$ TeV are calculated and discussed using MACE.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 10:35:00 GMT"
},
{
"version": "v2",
"created": "Thu, 12 Jul 2007 09:32:39 GMT"
},
{
"version": "v3",
"created": "Tue, 9 Oct 2007 08:39:49 GMT"
}
] | 2007-10-09T00:00:00 | [
[
"Baeuchle",
"Bjoern",
""
],
[
"Stoecker",
"Horst",
""
],
[
"Csernai",
"Laszlo",
""
]
] |
0707.0055 | Martin Hasenbusch | Michele Caselle, Martin Hasenbusch and Marco Panero | The interface free energy: Comparison of accurate Monte Carlo results
for the 3D Ising model with effective interface models | 44 pages, 7 figures; v2: clarified some aspects discussed in section
2, added references, corrected typos, version published in JHEP | JHEP0709:117,2007 | 10.1088/1126-6708/2007/09/117 | DFTT 10/07 | hep-lat cond-mat.soft hep-th | null | We provide accurate Monte Carlo results for the free energy of interfaces
with periodic boundary conditions in the 3D Ising model. We study a large range
of inverse temperatures, allowing to control corrections to scaling. In
addition to square interfaces, we study rectangular interfaces for a large
range of aspect ratios u=L_1/L_2. Our numerical results are compared with
predictions of effective interface models. This comparison verifies clearly the
effective Nambu-Goto model up to two-loop order. Our data also allow us to
obtain the estimates T_c sigma^-1/2=1.235(2), m_0++ sigma^-1/2=3.037(16) and
R_+=f_+^2 sigma_0 =0.387(2), which are more precise than previous ones.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 11:09:46 GMT"
},
{
"version": "v2",
"created": "Thu, 27 Sep 2007 09:38:56 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Caselle",
"Michele",
""
],
[
"Hasenbusch",
"Martin",
""
],
[
"Panero",
"Marco",
""
]
] |
0707.0056 | Damian Swift | Damian C. Swift, Dennis L. Paisley, Kenneth J. McClellan, Graeme J.
Ackland | The equation of state of solid nickel aluminide | null | Physical Review B, vol 76, 134111 (2007) | 10.1103/PhysRevB.76.134111 | LA-UR-05-6096 | cond-mat.other cond-mat.mtrl-sci | null | The pressure-volume-temperature equation of state of the intermetallic
compound NiAl was calculated theoretically, and compared with experimental
measurements. Electron ground states were calculated for NiAl in the CsCl
structure, using density functional theory, and were used to predict the cold
compression curve and the density of phonon states. The Rose form of
compression curve was found to reproduce the ab initio calculations well in
compression but exhibited significant deviations in expansion. A
thermodynamically-complete equation of state was constructed for NiAl. Shock
waves were induced in crystals of NiAl by the impact of laser-launched Cu
flyers and by launching NiAl flyers into transparent windows of known
properties. The TRIDENT laser was used to accelerate the flyers to speeds
between 100 and 600m/s. Point and line-imaging laser Doppler velocimetry was
used to measure the acceleration of the flyer and the surface velocity history
of the target. The velocity histories were used to deduce the stress state, and
hence states on the principal Hugoniot and the flow stress. Flyers and targets
were recovered from most experiments. The effect of elasticity and plastic flow
in the sample and window was assessed. The ambient isotherm reproduced static
compression data very well, and the predicted Hugoniot was consistent with
shock compression data.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 11:10:43 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Swift",
"Damian C.",
""
],
[
"Paisley",
"Dennis L.",
""
],
[
"McClellan",
"Kenneth J.",
""
],
[
"Ackland",
"Graeme J.",
""
]
] |
0707.0057 | Edward Yelland | E. A. Yelland, J. Singleton, C. H. Mielke, N. Harrison, F. F.
Balakirev, B. Dabrowski, J. R. Cooper | Quantum Oscillations in the Underdoped Cuprate YBa2Cu4O8 | Contains revisions addressing referees' comments including a
different Fig 1b. 4 pages, 4 figures | Phys. Rev. Lett. 100, 047003 (2008) | 10.1103/PhysRevLett.100.047003 | null | cond-mat.supr-con cond-mat.str-el | null | We report the observation of quantum oscillations in the underdoped cuprate
superconductor YBa2Cu4O8 using a tunnel-diode oscillator technique in pulsed
magnetic fields up to 85T. There is a clear signal, periodic in inverse field,
with frequency 660+/-15T and possible evidence for the presence of two
components of slightly different frequency. The quasiparticle mass is
m*=3.0+/-0.3m_e. In conjunction with the results of Doiron-Leyraud et al. for
YBa2Cu3O6.5, the present measurements suggest that Fermi surface pockets are a
general feature of underdoped copper oxide planes and provide information about
the doping dependence of the Fermi surface.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 11:12:19 GMT"
},
{
"version": "v2",
"created": "Mon, 4 Feb 2008 20:36:36 GMT"
}
] | 2008-02-04T00:00:00 | [
[
"Yelland",
"E. A.",
""
],
[
"Singleton",
"J.",
""
],
[
"Mielke",
"C. H.",
""
],
[
"Harrison",
"N.",
""
],
[
"Balakirev",
"F. F.",
""
],
[
"Dabrowski",
"B.",
""
],
[
"Cooper",
"J. R.",
""
]
] |
0707.0058 | Arun Kenath Mr | C. Sivaram (1) ((1) Indian Institute of Astrophysics) | What is Special About the Planck Mass? | 19 pages, 27 equations | null | null | null | gr-qc | null | Planck introduced his famous units of mass, length and time a hundred years
ago. The many interesting facets of the Planck mass and length are explored.
The Planck mass ubiquitously occurs in astrophysics, cosmology, quantum
gravity, string theory, etc. Current aspects of its implications for
unification of fundamental interactions, energy dependence of coupling
constants, dark energy, etc. are discussed.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 11:34:54 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Sivaram",
"C.",
"",
"Indian Institute of Astrophysics"
]
] |
0707.0059 | R. Srikanth | R. Srikanth and Subhashish Banerjee | The squeezed generalized amplitude damping channel | Accepted for publication in Physical Review A; note on methods of
generating bath squeezing added in Section II A; 12 pages, 7 figures | null | 10.1103/PhysRevA.77.012318 | null | quant-ph | null | Squeezing of a thermal bath introduces new features absent in an open quantum
system interacting with an uncorrelated (zero squeezing) thermal bath. The
resulting dynamics, governed by a Lindblad-type evolution, extends the concept
of a generalized amplitude damping channel, which corresponds to a dissipative
interaction with a purely thermal bath. Here we present the Kraus
representation of this map, which we call the squeezed generalized amplitude
damping channel. As an application of this channel to quantum information, we
study the classical capacity of this channel.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 12:31:19 GMT"
},
{
"version": "v2",
"created": "Tue, 27 Nov 2007 22:12:48 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Srikanth",
"R.",
""
],
[
"Banerjee",
"Subhashish",
""
]
] |
0707.0060 | Kari J. Eskola | K. J. Eskola, V. J. Kolhinen, H. Paukkunen and C. A. Salgado | Global reanalysis of nPDFs | 10 pages, talk given at the workshop "High-pT physics at LHC", March
23-27, 2007, Department of Physics, University of Jyvaskyla, Finland | PoSLHC07:018,2007 | null | null | hep-ph | null | In this talk, we present the results from our recent global reanalysis of
nuclear parton distribution functions (nPDFs), where the DGLAP-evolving nPDFs
are constrained by nuclear hard process data from deep inelastic $l+A$
scattering (DIS) and the Drell-Yan (DY) process in $p+A$ collisions, and by sum
rules. The main improvements over our earlier work {\em EKS98} are the
automated $\chi^2$ minimization, better controllable fit functions and
possibility for error estimates. The obtained 16-parameter fit to N=514
datapoints is good, $\chi^2/{\rm d.o.f}=0.82$. Fit quality comparison and the
error estimates obtained show that the old {\em EKS98} parametrization is fully
consistent with the present automated reanalysis. Comparison with other global
nPDF analyses is presented as well. Within the DGLAP framework we also discuss
the possibility of incorporating a clearly stronger gluon shadowing, which is
suggested by the RHIC BRAHMS data from d+Au collisions.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 12:38:41 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Eskola",
"K. J.",
""
],
[
"Kolhinen",
"V. J.",
""
],
[
"Paukkunen",
"H.",
""
],
[
"Salgado",
"C. A.",
""
]
] |
0707.0061 | Simon Gr\"oblacher | Martin Stuetz, Simon Groeblacher, Thomas Jennewein, Anton Zeilinger | How to create and detect N-dimensional entangled photons with an active
phase hologram | null | Appl. Phys. Lett. 90, 261114 (2007) | 10.1063/1.2752728 | null | quant-ph | null | The experimental realization of multidimensional quantum states may lead to
unexplored and interesting physics, as well as advanced quantum communication
protocols. The orbital angular momentum of photons is a well suitable discrete
degree of freedom for implementing high-dimensional quantum systems. The
standard method to generate and manipulate such photon modes is to use bulk and
fixed optics. Here the authors demonstrate the utilization of a spatial light
modulator to manipulate the orbital angular momentum of entangled photons
generated in spontaneous parametric downconversion. They show that their setup
allows them to realize photonic entanglement of up to 21 dimensions, which in
principle can be extended to even larger dimensions.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 13:36:21 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Stuetz",
"Martin",
""
],
[
"Groeblacher",
"Simon",
""
],
[
"Jennewein",
"Thomas",
""
],
[
"Zeilinger",
"Anton",
""
]
] |
0707.0062 | Stefan Kirchner | Stefan Kirchner and Qimiao Si | Magnetic Single-Electron Transistor as a Tunable Model System for
Kondo-Destroying Quantum Criticality | 4 pages, 3 figures, to appear in the proceedings of SCES 07 (the
international conference on strongly correlated electron systems 2007) | null | 10.1016/j.physb.2007.10.297 | null | cond-mat.str-el | null | Single-electron transistors attached to ferromagnetic leads can undergo a
continuous quantum phase transition as their gate voltage is tuned. The
corresponding quantum critical point separates a Fermi liquid phase from a
non-Fermi liquid one. Here, we expound on the physical idea proposed earlier.
The key physics is the critical destruction of the Kondo effect, which
underlies a new class of quantum criticality that has been argued to apply to
heavy fermion metals. Its manifestation in the transport properties is studied
through an effective Bose-Fermi Kondo model; the bosonic bath, corresponding to
the spin waves of the ferromagnetic leads, describes a particular type of
sub-Ohmic dissipation. We also present results for general forms of sub-Ohmic
dissipative bath, and consider in some detail the case with critical paramagons
replacing spin waves. Finally, we discuss some delicate aspects in the
theoretical treatment of the effect of a local magnetic field, particularly in
connection with the frequently employed Non-Crossing Approximation.
| [
{
"version": "v1",
"created": "Mon, 2 Jul 2007 00:33:10 GMT"
},
{
"version": "v2",
"created": "Mon, 20 Aug 2007 16:25:17 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Kirchner",
"Stefan",
""
],
[
"Si",
"Qimiao",
""
]
] |
0707.0063 | Xijia Miao | Xijia Miao | The STIRAP-based unitary decelerating and accelerating processes of a
single free atom | 93 pages, no figure. No change for the main ideas of the old versions
published in 2007, e.g., the time evolution process is calculated in the
three-state subspace rather than by using the original Schroedinger equation
and unitarity is necessary to realize it. Two general adiabatic conditions
are set up (See: the expanded section 7). The errors are corrected | null | null | null | quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A STIRAP-based unitary decelerating (accelerating) process consists of a
train of the standard three-state STIRAP pulse sequences which may act as the
basic unitary decelerating (accelerating) sequences. The present work is
focused on investigating analytically and quantitatively how the momentum
distribution of a momentum superposition state such as a momentum Gaussian
wave-packet state of a single freely moving atom affects the STIRAP state
transfer in these decelerating and accelerating processes. The complete STIRAP
state transfer and the unitarity of these processes are stressed highly in the
investigation. It has been shown that the momentum distribution has an
important influence upon the STIRAP state-transfer efficiency. In the ideal
adiabatic condition these unitary decelerating and accelerating processes for a
freely moving atom are studied in detail, and it is shown that they can be used
to manipulate and control in time and space the center-of-mass position and
momentum of a Gaussian wave-packet motional state of a free atom. Two general
(strict and accurate) adiabatic conditions for the basic STIRAP decelerating
and accelerating processes are derived analytically. With the help of the
STIRAP theory and the unitary quantum dynamics it confirms theoretically that
the time- and space-compressing processes of the quantum control process
(quant-ph/0607144) can be realized almost perfectly by the STIRAP-based unitary
decelerating and accelerating processes in the ideal or nearly ideal adiabatic
condition.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 16:04:52 GMT"
},
{
"version": "v2",
"created": "Tue, 3 Jul 2007 03:45:37 GMT"
},
{
"version": "v3",
"created": "Tue, 2 Oct 2007 23:34:46 GMT"
},
{
"version": "v4",
"created": "Sun, 10 May 2009 23:48:30 GMT"
}
] | 2009-05-11T00:00:00 | [
[
"Miao",
"Xijia",
""
]
] |
0707.0064 | Luis Manuel Rico Gutierrez | L. M. Rico, M. Kirchbach | Causal Propagation of Spin-Cascades | 10 pages | Mod.Phys.Lett.A21:2961-2969,2006 | 10.1142/S0217732306020779 | null | hep-ph | null | We gauge the direct product of the Proca with the Dirac equation that
describes the coupling to the electromagnetic field of the spin-cascade
(1/2,3/2) residing in the four-vector spinor and analyze propagation of its
wave fronts in terms of the Courant-Hilbert criteria. We show that the
differential equation under consideration is unconditionally hyperbolic and the
propagation of its wave fronts unconditionally causal. In this way we proof
that the irreducible spin-cascade embedded within four-vector is free from the
Velo-Zwanziger problem that plagues the Rarita-Schwinger description of
spin-3/2. The proof extends also to the direct product of two Proca equations
and implies causal propagation of the spin-cascade (0,1,2) within an
electromagnetic environment.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 14:25:30 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Rico",
"L. M.",
""
],
[
"Kirchbach",
"M.",
""
]
] |
0707.0065 | Artorix de la Cruz de Ona | Artorix de la Cruz de Ona | Superconducting-normal interface propagation speed in superconducting
thin films | 4 pages, 3 figures | null | null | null | cond-mat.supr-con cond-mat.mtrl-sci | null | In this paper a new approach to obtain the interface propagation speed in
superconductors by means of a variationalme thod is introduced. The results of
the approach proposed coincide with the numerical simulations. The hyperbolic
differential equations are introduced as an extension of the modelin order to
take into account delay effects in the front propagation due to the pinning.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 14:34:59 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"de Ona",
"Artorix de la Cruz",
""
]
] |
0707.0066 | Patrick Simon | P. Simon, P. Watts, P. Schneider, H. Hoekstra, M.D. Gladders, H.K.C.
Yee, B.C. Hsieh and H. Lin | First detection of galaxy-galaxy-galaxy lensing in RCS. A new tool for
studying the matter environment of galaxy pairs | 15 pages, 12 figures, accepted by A&A; minor changes | Astron.Astrophys.479:655-667,2008 | 10.1051/0004-6361:20078197 | null | astro-ph | null | The weak gravitational lensing effect, small coherent distortions of galaxy
images by means of a gravitational tidal field, can be used to study the
relation between the matter and galaxy distribution. In this context, weak
lensing has so far only been used for considering a second-order correlation
function that relates the matter density and galaxy number density as a
function of separation. We implement two new, third-order correlation functions
that have recently been suggested in the literature, and apply them to the
Red-Sequence Cluster Survey. We demonstrate that it is possible, even with
already existing data, to make significant measurements of third-order lensing
correlations. We develop an optimised computer code for the correlation
functions. To test its reliability a set of tests are performed. The
correlation functions are transformed to aperture statistics, which allow easy
tests for remaining systematics in the data. In order to further verify the
robustness of our measurement, the signal is shown to vanish when randomising
the source ellipticities. Finally, the lensing signal is compared to crude
predictions based on the halo-model. On angular scales between roughly 1 arcmin
and 11 arcmin a significant third-order correlation between two lens positions
and one source ellipticity is found. We discuss this correlation function as a
novel tool to study the average matter environment of pairs of galaxies.
Correlating two source ellipticities and one lens position yields a less
significant but nevertheless detectable signal on a scale of 4 arcmin. Both
signals lie roughly within the range expected by theory which supports their
cosmological origin.[ABRIDGED]
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 14:46:34 GMT"
},
{
"version": "v2",
"created": "Tue, 8 Jan 2008 12:19:45 GMT"
}
] | 2014-11-18T00:00:00 | [
[
"Simon",
"P.",
""
],
[
"Watts",
"P.",
""
],
[
"Schneider",
"P.",
""
],
[
"Hoekstra",
"H.",
""
],
[
"Gladders",
"M. D.",
""
],
[
"Yee",
"H. K. C.",
""
],
[
"Hsieh",
"B. C.",
""
],
[
"Lin",
"H.",
""
]
] |
0707.0067 | Kokoulina Elena Sergeevna | E.S. Kokoulina, A.Ya. Kutov, for SVD-2 Collaboration | Multiparticle Production at High Multiplicities | 8 pages, 5 figures, Talk presented at the International
school-seminar "New Physics and Quantum Chromodynamics at External
Conditions". May 3-6, 2007, Dnipropetrovsk, Ukraine | null | null | null | hep-ph | null | Theoretical and experimental studies of high multiplicity events are
analyzed. Some interesting phenomena can be revealed at high multiplicities.
Preliminary results of project "Thermalization" are reported.
| [
{
"version": "v1",
"created": "Mon, 2 Jul 2007 09:46:35 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Kokoulina",
"E. S.",
""
],
[
"Kutov",
"A. Ya.",
""
],
[
"Collaboration",
"for SVD-2",
""
]
] |
0707.0068 | Dr Paul A. Crowther | Paul A. Crowther (Sheffield, UK) | Hot Massive Stars: The Impact of HST | 8 pages, 5 figures, Review article to appear in proc. "The Impact of
HST on European Astronomy" (G. De Marchi & F.D. Macchetto, Eds.),
Astrophysics & Space Science, Springer | null | null | null | astro-ph | null | We review the contribution of Hubble Space Telescope to the study of hot,
luminous stars. Optical and IR imaging have permitted spatially resolved
observations of young, massive clusters within Local Group galaxies, such as
R136, NGC 3603 and Arches, revealing unprecedented concentrations of very
massive O stars. UV spectroscopy of field OB stars in the Magellanic Clouds
have provided suitable templates for interpretation of metal-poor star-forming
galaxies at high-redshift. Spectacular imaging provides the detailed structure
of ejecta nebulae from individual stars, including the Homunculus associated
with eta Carinae and M1-67, associated with a Wolf-Rayet star. HST has
permitted individual massive stars to be spatially resolved in giant HII
regions located beyond the Local Group, such as NGC 604, plus individual
clusters, dominated by the light of massive stars within starburst galaxies at
larger distances, such as NGC 3125. UV spectroscopy of young, massive clusters
in the extremely metal-poor HII galaxy I Zw 18 include signatures of large
numbers of Wolf-Rayet stars.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 14:55:18 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Crowther",
"Paul A.",
"",
"Sheffield, UK"
]
] |
0707.0069 | Katalin Kamar\'as | G. Klupp, F. Borondics, \'E. Kov\'ats, \'A. Pekker, G. B\'enyei, I.
Jalsovszky, R. Hackl, S. Pekker, K. Kamar\'as | Vibrational spectra of C60C8H8 and C70C8H8 in the rotor-stator and
polymer phases | 26 pages, 8 figures, to appear in Journal of Physical Chemistry B 2nd
version: minor changes in wording, accepted version by journal | J. Phys. Chem. B 111, 12375-12382 (2007) | 10.1021/jp075204h | null | cond-mat.mtrl-sci | null | C60-C8H8 and C70-C8H8 are prototypes of rotor-stator cocrystals. We present
infrared and Raman spectra of these materials and show how the rotor-stator
nature is reflected in their vibrational properties. We measured the
vibrational spectra of the polymer phases poly(C60C8H8) and poly(C70C8H8)
resulting from a solid state reaction occurring on heating. Based on the
spectra we propose a connection pattern for the fullerene in poly(C60C8H8),
where the symmetry of the C60 is D2h. On illuminating the C60-C8H8 cocrystal
with green or blue light a photochemical reaction was observed leading to a
similar product to that of the thermal polymerization.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 18:33:05 GMT"
},
{
"version": "v2",
"created": "Wed, 19 Sep 2007 20:11:01 GMT"
}
] | 2009-09-29T00:00:00 | [
[
"Klupp",
"G.",
""
],
[
"Borondics",
"F.",
""
],
[
"Kováts",
"É.",
""
],
[
"Pekker",
"Á.",
""
],
[
"Bényei",
"G.",
""
],
[
"Jalsovszky",
"I.",
""
],
[
"Hackl",
"R.",
""
],
[
"Pekker",
"S.",
""
],
[
"Kamarás",
"K.",
""
]
] |
0707.0070 | Gast\'on Andr\'es Garc\'ia | Nicolas Andruskiewitsch and Gaston Andres Garcia | Quantum subgroups of a simple quantum group at roots of 1 | 29 pages, accepted in Compositio Mathematica | Compositio Math. 145 (2009), 476-500 | 10.1112/S0010437X09003923 | null | math.QA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Let G be a connected, simply connected, simple complex algebraic group and
let e be a primitive l-th root of 1, with l odd and 3 does not divide l if G is
of type G_{2}. We determine all Hopf algebra quotients of the quantized
coordinate algebra of G at e.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 15:44:54 GMT"
},
{
"version": "v2",
"created": "Thu, 11 Sep 2008 17:48:18 GMT"
}
] | 2014-01-14T00:00:00 | [
[
"Andruskiewitsch",
"Nicolas",
""
],
[
"Garcia",
"Gaston Andres",
""
]
] |
0707.0071 | Ferenc Niedermayer | P. Hasenfratz, D. Hierl, V. Maillart, F. Niedermayer, A. Sch\"afer, C.
Weiermann and M. Weingart | 2+1 Flavor QCD simulated in the epsilon-regime in different topological
sectors | 19 pages, 13 figures, added Sigma in MSbar | JHEP 0911:100,2009 | 10.1088/1126-6708/2009/11/100 | null | hep-lat | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We generated configurations with the parametrized fixed-point Dirac operator
D_{FP} on a (1.6 fm)^4 box at a lattice spacing a=0.13 fm. We compare the
distributions of the three lowest k=1,2,3 eigenvalues in the nu= 0,1,2
topological sectors with that of the Random Matrix Theory predictions. The
ratios of expectation values of the lowest eigenvalues and the cumulative
eigenvalue distributions are studied for all combinations of k and nu. After
including the finite size correction from one-loop chiral perturbation theory
we obtained for the chiral condensate in the MSbar scheme
Sigma(2GeV)^{1/3}=0.239(11) GeV, where the error is statistical only.
| [
{
"version": "v1",
"created": "Mon, 2 Jul 2007 16:28:00 GMT"
},
{
"version": "v2",
"created": "Sat, 7 Jul 2007 17:49:16 GMT"
},
{
"version": "v3",
"created": "Sat, 20 Jun 2009 14:26:11 GMT"
}
] | 2014-11-18T00:00:00 | [
[
"Hasenfratz",
"P.",
""
],
[
"Hierl",
"D.",
""
],
[
"Maillart",
"V.",
""
],
[
"Niedermayer",
"F.",
""
],
[
"Schäfer",
"A.",
""
],
[
"Weiermann",
"C.",
""
],
[
"Weingart",
"M.",
""
]
] |
0707.0072 | Dietrich Stauffer | Christian Schulze and Dietrich Stauffer | Language simulation after a conquest | 4 pages including figures; not submitted to a journal | null | null | null | physics.soc-ph | null | When a region is conquered by people speaking another language, we assume
within the Schulze model that at each iteration each person with probability s
shifts to the conquering language. The time needed for the conquering language
to become dominating is about 2/s for directed Barabasi-Albert networks, but
diverges on the square lattice for decreasing s at some critical value sc
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 16:10:34 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Schulze",
"Christian",
""
],
[
"Stauffer",
"Dietrich",
""
]
] |
0707.0073 | Jon Machta | J. Machta, C. M. Newman and D. L. Stein | The Percolation Signature of the Spin Glass Transition | 13 pages, 6 figures | J. Stat. Phys. 130, 113-128 (2008) | 10.1007/s10955-007-9446-2 | null | cond-mat.stat-mech cond-mat.dis-nn | null | Magnetic ordering at low temperature for Ising ferromagnets manifests itself
within the associated Fortuin-Kasteleyn (FK) random cluster representation as
the occurrence of a single positive density percolating network. In this paper
we investigate the percolation signature for Ising spin glass ordering -- both
in short-range (EA) and infinite-range (SK) models -- within a two-replica FK
representation and also within the different Chayes-Machta-Redner two-replica
graphical representation. Based on numerical studies of the $\pm J$ EA model in
three dimensions and on rigorous results for the SK model, we conclude that the
spin glass transition corresponds to the appearance of {\it two} percolating
clusters of {\it unequal} densities.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 16:18:16 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Machta",
"J.",
""
],
[
"Newman",
"C. M.",
""
],
[
"Stein",
"D. L.",
""
]
] |
0707.0074 | Aidan Roy | Michael Skotiniotis, Aidan Roy, Barry C. Sanders | On the epistemic view of quantum states | 16 pages, 9 figures | J. Math. Phys. 49, 082103 (2008) | 10.1063/1.2966133 | null | quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the strengths and limitations of the Spekkens toy model, which
is a local hidden variable model that replicates many important properties of
quantum dynamics. First, we present a set of five axioms that fully encapsulate
Spekkens' toy model. We then test whether these axioms can be extended to
capture more quantum phenomena, by allowing operations on epistemic as well as
ontic states. We discover that the resulting group of operations is isomorphic
to the projective extended Clifford Group for two qubits. This larger group of
operations results in a physically unreasonable model; consequently, we claim
that a relaxed definition of valid operations in Spekkens' toy model cannot
produce an equivalence with the Clifford Group for two qubits. However, the new
operations do serve as tests for correlation in a two toy bit model, analogous
to the well known Horodecki criterion for the separability of quantum states.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 18:13:13 GMT"
},
{
"version": "v2",
"created": "Thu, 10 Jul 2008 05:29:17 GMT"
}
] | 2008-09-16T00:00:00 | [
[
"Skotiniotis",
"Michael",
""
],
[
"Roy",
"Aidan",
""
],
[
"Sanders",
"Barry C.",
""
]
] |
0707.0075 | Alexey Teplinsky | Konstantin Khanin and Alexey Teplinsky | Herman's Theory Revisited | 10 pages | Invent. Math. 2009, Vol.178, no.2, pp.333-344 | 10.1007/s00222-009-0200-z | null | math.DS | null | We prove that a $C^{2+\alpha}$-smooth orientation-preserving circle
diffeomorphism with rotation number in Diophantine class $D_\delta$,
$0<\delta<\alpha\le1$, is $C^{1+\alpha-\delta}$-smoothly conjugate to a rigid
rotation. We also derive the most precise version of Denjoy's inequality for
such diffeomorphisms.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 18:27:26 GMT"
}
] | 2010-07-05T00:00:00 | [
[
"Khanin",
"Konstantin",
""
],
[
"Teplinsky",
"Alexey",
""
]
] |
0707.0076 | Hirotaka Yoshino | Hirotaka Yoshino, Tetsuya Shiromizu | Collision of high-energy closed strings: Formation of a ring-like
apparent horizon | 22 pages, 9 figures, title modified, references added, published
version | Phys.Rev.D76:084021,2007 | 10.1103/PhysRevD.76.084021 | Alberta-Thy-04-07 | gr-qc hep-ph hep-th | null | We study collisions of two high-energy closed strings in the framework of
$D$-dimensional general relativity. The model of a high-energy closed string is
introduced as a {/it pp}-wave generated by a ring-shaped source with the radius
$R$. At the instant of the collision, the positions of two strings are assumed
to coincide precisely. In this setup, we study the formation of two kinds of
apparent horizons (AHs): the AH of topology $S^{D-2}$ (the black hole AH) and
the AH of topology $S^1/times S^{D-3}$ (the black ring AH). These two AHs are
solved numerically and the conditions for the formation of the two AHs are
clarified in terms of the ring radius $R$. Specifically, we demonstrate that
the black ring AH forms for sufficiently large $R$. The effects of an impact
parameter and the relative orientation of incoming strings in more general
cases are briefly discussed.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 18:58:12 GMT"
},
{
"version": "v2",
"created": "Thu, 18 Oct 2007 19:57:48 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Yoshino",
"Hirotaka",
""
],
[
"Shiromizu",
"Tetsuya",
""
]
] |
0707.0077 | Peng Gao | Peng Gao | Finite Sections of Weighted Carleman's Inequality | 13 pages | null | null | null | math.CA | null | We study finite sections of weighted Carleman's inequality following the
approach of De Bruijn. Similar to the unweighted case, we obtain an asymptotic
expression for the optimal constant.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 18:38:33 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Gao",
"Peng",
""
]
] |
0707.0078 | Alexey Teplinsky | Alexey Teplinsky | Herman's Theory Revisited (Extension) | 12 pages, this paper is a logical continuation of its first
reference; aknowledgement added | Ukr. Math. J., 2008, Vol.60, no.2 (in Ukrainian) | null | null | math.DS | null | We prove that a $C^{3+\beta}$-smooth orientation-preserving circle
diffeomorphism with rotation number in Diophantine class $D_\delta$,
$0<\beta<\delta<1$, is $C^{2+\beta-\delta}$-smoothly conjugate to a rigid
rotation.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 18:58:45 GMT"
},
{
"version": "v2",
"created": "Sat, 7 Jul 2007 09:09:04 GMT"
},
{
"version": "v3",
"created": "Sat, 13 Oct 2007 22:05:56 GMT"
}
] | 2010-07-05T00:00:00 | [
[
"Teplinsky",
"Alexey",
""
]
] |
0707.0079 | Noriyoshi Ishii | Noriyoshi Ishii (Tsukuba U., CCS), Takumi Doi (Kentucky U. & RIKEN
BNL), Makoto Oka (Tokyo Inst. Tech.), Hideo Suganuma (Kyoto U.) | Five-quark picture of Lambda(1405) in anisotropic lattice QCD | A talk given at Yukawa International Seminar(YKIS) 2006 NEW FRONTIERS
IN QCD --Exotic Hadrons and Hadronic Matter--, Kyoto, Japan, Nov. 20-Dec.8
2006, 4 pages, 2 figures | Prog.Theor.Phys.Suppl.168:598-601,2007 | 10.1143/PTPS.168.598 | null | hep-lat | null | Five-quark (5Q) picture of Lambda(1405) is studied using quenched lattice QCD
with an exotic 5Q operator of N\bar{K} type. To discreminate mere N\bar{K} and
\Sigma\pi scattering states, Hybrid Boundary Condition (HBC), a
flavor-dependent boundary condition, is imposed on the quark fields along
spatial direction. 5Q mass m_{5Q}\simeq 1.89 GeV is obtained after the chiral
extrapolation to the physical quark mass region, which is too heavy to be
identified with Lambda(1405). Then, Lambda(1405) seems neither a pure 3Q state
nor a pure 5Q state, and therefore we present an interesting possibility that
Lambda(1405) is a mixed state of 3Q and 5Q states.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 19:12:13 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Ishii",
"Noriyoshi",
"",
"Tsukuba U., CCS"
],
[
"Doi",
"Takumi",
"",
"Kentucky U. & RIKEN\n BNL"
],
[
"Oka",
"Makoto",
"",
"Tokyo Inst. Tech."
],
[
"Suganuma",
"Hideo",
"",
"Kyoto U."
]
] |
0707.0080 | Mark Newman | M. E. J. Newman | Component sizes in networks with arbitrary degree distributions | 5 pages, 1 figure | Phys. Rev. E 76, 045101 (2007) | 10.1103/PhysRevE.76.045101 | null | cond-mat.stat-mech cond-mat.dis-nn | null | We give an exact solution for the complete distribution of component sizes in
random networks with arbitrary degree distributions. The solution tells us the
probability that a randomly chosen node belongs to a component of size s, for
any s. We apply our results to networks with the three most commonly studied
degree distributions -- Poisson, exponential, and power-law -- as well as to
the calculation of cluster sizes for bond percolation on networks, which
correspond to the sizes of outbreaks of SIR epidemic processes on the same
networks. For the particular case of the power-law degree distribution, we show
that the component size distribution itself follows a power law everywhere
below the phase transition at which a giant component forms, but takes an
exponential form when a giant component is present.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 19:16:37 GMT"
}
] | 2007-10-18T00:00:00 | [
[
"Newman",
"M. E. J.",
""
]
] |
0707.0081 | Anirban Basu | Anirban Basu | Higher Derivative Corrections in Holographic QCD | 24 pages, LaTeX | Phys.Rev.D76:124007,2007 | 10.1103/PhysRevD.76.124007 | null | hep-th | null | We consider the effect of the R^4 term in type IIA string theory on the
supergravity background dual to N_c D4 branes compactified on a circle with
supersymmetry breaking boundary conditions. We study the dynamics of D8 branes
in this perturbed geometry in the probe approximation. This leads to an
analysis of higher derivative corrections in holographic QCD beyond the
supergravity approximation. We make a rough estimate of the corrections to the
masses of some of the lightest (axial) vector mesons. The corrections are
suppressed by a factor of (g_{YM}^2 N_c)^{-3} compared to their supergravity
values. We find that the masses of these mesons increase from their
supergravity values.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 21:45:22 GMT"
},
{
"version": "v2",
"created": "Mon, 3 Dec 2007 22:46:20 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Basu",
"Anirban",
""
]
] |
0707.0082 | Richard Barton | Richard J. Barton | Minimax Robust Function Reconstruction in Reproducing Kernel Hilbert
Spaces | null | null | null | null | math.ST stat.TH | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we present a unified approach to function approximation in
reproducing kernel Hilbert spaces (RKHS) that establishes a previously
unrecognized optimality property for several well-known function approximation
techniques, such as minimum-norm interpolation, smoothing splines, and
pseudo-inverses. We consider the problem of approximating a function belonging
to an arbitrary real-valued RKHS on R^d based on approximate observations of
the function. The observations are approximate in the sense that the actual
observations (i.e., the true function values) are known only to belong to a
convex set of admissible observations. We seek a minimax optimal approximation
for the function that minimizes the supremum of the RKHS norm on the error
between the true function and the chosen approximation subject only to the
conditions that the true function belongs to a uniformly bounded uncertainty
set of functions that satisfy the constraints on the observations and that the
approximation is a member of the RKHS. We refer to such a solution as a minimax
robust reconstruction. We characterize the solution to the minimax robust
reconstruction problem and show that it is equivalent to solving a
straightforward convex optimization problem. We demonstrate that a minimax
robust reconstruction will generally be more stable than an approximation based
on interpolation through a nominal set of observations and that, subject to
some mild regularity conditions on the convex set of admissible observations,
the minimax robust reconstruction is unconditionally stable. We motivate our
results by characterizing the minimax robust reconstruction for several
specific convex observational models and discuss relationships with other
approaches to function approximation.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 21:49:38 GMT"
},
{
"version": "v2",
"created": "Thu, 3 Jan 2013 20:38:34 GMT"
},
{
"version": "v3",
"created": "Sat, 5 Jan 2013 20:06:54 GMT"
}
] | 2013-01-08T00:00:00 | [
[
"Barton",
"Richard J.",
""
]
] |
0707.0083 | Lev A. Melnikovsky | L.A.Melnikovsky | On Sound Reflection in Superfluid | 9 pages, 4 figures | Journal of Low Temperature Physics, Volume 150, Numbers 3-4,
174-180 (2008) | 10.1007/s10909-007-9534-3 | null | cond-mat.supr-con cond-mat.soft | null | We consider reflection of the first and the second sound waves by a rigid
flat wall in superfluid. Nontrivial dependence of the reflection coefficients
on the angle of incidence is obtained. Sound conversion is predicted at slanted
incidence.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 23:28:46 GMT"
}
] | 2011-09-20T00:00:00 | [
[
"Melnikovsky",
"L. A.",
""
]
] |
0707.0084 | Kyle Pula | Kyle Pula | Gallai Multigraphs | 16 pages, 5 figures | null | null | null | math.CO | null | A complete edge-colored graph or multigraph is called Gallai if it lacks
rainbow triangles. We give a construction of all finite Gallai multigraphs.
| [
{
"version": "v1",
"created": "Sat, 30 Jun 2007 23:48:45 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Pula",
"Kyle",
""
]
] |
0707.0085 | Ashutosh V. Kotwal | T. Aaltonen, et al | First Measurement of the W Boson Mass in Run II of the Tevatron | published version in PRL | Phys.Rev.Lett.99:151801,2007 | 10.1103/PhysRevLett.99.151801 | null | hep-ex | null | We present a measurement of the W boson mass using 200/pb of data collected
in pbar p collisions at sqrt(s) = 1.96 TeV by the CDF II detector at Run II of
the Fermilab Tevatron. With a sample of 63964 W -> e nu candidates and 51128 W
-> mu nu candidates, we measure M_W = (80413 +- 34 (stat) +- 34 (syst) = 80413
+- 48) MeV/c^2. This is the most precise single measurement of the W boson mass
to date.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 01:26:03 GMT"
},
{
"version": "v2",
"created": "Wed, 7 Nov 2007 19:21:45 GMT"
}
] | 2010-05-12T00:00:00 | [
[
"Aaltonen",
"T.",
""
]
] |
0707.0086 | Max Little | Max A Little, Patrick E McSharry, Stephen J Roberts, Declan AE
Costello and Irene M Moroz | Exploiting Nonlinear Recurrence and Fractal Scaling Properties for Voice
Disorder Detection | 1 ZIP file containing 1 LaTeX file, 6 EPS figures, 1 BBL file, 1 BST
and 1 CLS file. Eprint for Biomed Eng Online, 2007 Jun 26, 6(1):23 | Biomed Eng Online, 2007 Jun 26, 6(1):23 | 10.1186/1475-925X-6-23 | null | nlin.CG nlin.CD | null | Voice disorders affect patients profoundly, and acoustic tools can
potentially measure voice function objectively. Nonetheless, existing tools are
limited to analysing voices displaying near periodicity, and do not account for
inherent biophysical nonlinearity and non-Gaussian randomness. They do not
directly measure complex nonlinear aperiodicity, and turbulent, aeroacoustic,
non-Gaussian randomness. Often these tools have limited clinical usefulness.
This paper introduces two new tools to speech analysis: recurrence and fractal
scaling, which overcome the range limitations of existing tools by addressing
directly these two symptoms of disorder, and a simple bootstrapped classifier
distinguishes normal from disordered voices to 91.8% overall accuracy on a
large database of subjects with a wide variety of voice disorders. They are
widely applicable to the whole range of disordered voice phenomena by design.
These new measures could therefore be used for a variety of practical clinical
purposes.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 01:26:50 GMT"
}
] | 2019-10-23T00:00:00 | [
[
"Little",
"Max A",
""
],
[
"McSharry",
"Patrick E",
""
],
[
"Roberts",
"Stephen J",
""
],
[
"Costello",
"Declan AE",
""
],
[
"Moroz",
"Irene M",
""
]
] |
0707.0087 | Andrew Duncan | Andrew J Duncan, Ilya V Kazachkov, Vladimir N Remeslennikov | Orthogonal Systems in Finite Graphs | 38 pages, 6 figures | null | null | null | math.GR | null | Given a finite graph G there is a corresponding group given by the
presentation with generators the vertices of G and a relation [x,y]=1 for
generators x and y precisely when (x,y) is an edge of G. Such groups are known
as partially commutative groups (or right-angled Artin groups). In this paper
we construct orthogonality theory for graphs with the study of partially
commutative groups in mind. The theory developed here provides tools for the
study of the structure of the centraliser lattice of partially commutative
groups and for their automorphism groups.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 01:55:33 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Duncan",
"Andrew J",
""
],
[
"Kazachkov",
"Ilya V",
""
],
[
"Remeslennikov",
"Vladimir N",
""
]
] |
0707.0088 | Daniel Sage | Pramod N. Achar, Daniel S. Sage | Perverse coherent sheaves and the geometry of special pieces in the
unipotent variety | 30 pages; minor corrections and additions | Adv. Math. 220 (2009) 1265-1296 | 10.1016/j.aim.2008.10.012 | null | math.RT math.AG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Let X be a scheme of finite type over a Noetherian base scheme S admitting a
dualizing complex, and let U be an open subset whose complement has codimension
at least 2. We extend the Deligne-Bezrukavnikov theory of perverse coherent
sheaves by showing that a coherent middle extension (or intersection
cohomology) functor from perverse sheaves on U to perverse sheaves on X may be
defined for a much broader class of perversities than has previously been
known. We also introduce a derived category version of the coherent middle
extension functor.
Under suitable hypotheses, we introduce a construction (called
"S2-extension") in terms of perverse coherent sheaves of algebras on X that
takes a finite morphism to U and extends it in a canonical way to a finite
morphism to X. In particular, this construction gives a canonical
"S2-ification" of appropriate X. The construction also has applications to the
"Macaulayfication" problem, and it is particularly well-behaved when X is
Gorenstein.
Our main goal, however, is to address a conjecture of Lusztig on the geometry
of special pieces (certain subvarieties of the unipotent variety of a reductive
algebraic group). The conjecture asserts in part that each special piece is the
quotient of some variety (previously unknown in the exceptional groups and in
positive characteristic) by the action of a certain finite group. We use
S2-extension to give a uniform construction of the desired variety.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 03:11:26 GMT"
},
{
"version": "v2",
"created": "Wed, 23 Jan 2008 22:32:14 GMT"
},
{
"version": "v3",
"created": "Wed, 15 Oct 2008 19:46:58 GMT"
}
] | 2017-01-03T00:00:00 | [
[
"Achar",
"Pramod N.",
""
],
[
"Sage",
"Daniel S.",
""
]
] |
0707.0089 | Gavin E. Crooks | Paul Maragakis, Felix Ritort, Carlos Bustamante, Martin Karplus, Gavin
E. Crooks | Bayesian estimates of free energies from nonequilibrium work data in the
presence of instrument noise | 8 pages | J. Chem. Phys. 129, 024102 (2008) | 10.1063/1.2937892 | null | cond-mat.stat-mech cond-mat.soft | null | The Jarzynski equality and the fluctuation theorem relate equilibrium free
energy differences to non-equilibrium measurements of the work. These relations
extend to single-molecule experiments that have probed the finite-time
thermodynamics of proteins and nucleic acids. The effects of experimental error
and instrument noise have not previously been considered. Here, we present a
Bayesian formalism for estimating free-energy changes from non-equilibrium work
measurements that compensates for instrument noise and combines data from
multiple driving protocols. We reanalyze a recent set of experiments in which a
single RNA hairpin is unfolded and refolded using optical tweezers at three
different rates. Interestingly, the fastest and farthest-from-equilibrium
measurements contain the least instrumental noise, and therefore provide a more
accurate estimate of the free energies than a few slow, more noisy,
near-equilibrium measurements. The methods we propose here will extend the
scope of single-molecule experiments; they can be used in the analysis of data
from measurements with AFM, optical, and magnetic tweezers.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 03:59:39 GMT"
}
] | 2008-08-30T00:00:00 | [
[
"Maragakis",
"Paul",
""
],
[
"Ritort",
"Felix",
""
],
[
"Bustamante",
"Carlos",
""
],
[
"Karplus",
"Martin",
""
],
[
"Crooks",
"Gavin E.",
""
]
] |
0707.0090 | Fang Jiangxue | Jiangxue Fang | Calculation of local Fourier transforms for formal connections | null | null | null | null | math.AG | null | We calculate the local Fourier transforms for formal connections. In
particular, we verify an analogous conjecture suggested in Laumon's paper:
"Transformation de Fourier, constantes d'equations fonctionnelles et conjecture
de Weil, 2.6.3".
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 05:20:48 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Fang",
"Jiangxue",
""
]
] |
0707.0091 | Ruida Chen | Ruida Chen | Unheeded pseudo solution of Dirac-Coulomb equations with an indirect
transformation of functions | 8 pages, no figure, 22 equations. The v1 version entitled "A hidden
pseudo solution of second-order equation from first-order Dirac-Coulomb
equation with a transformation of functions" has been withdrawn by the author
due to a crucial mathematics error in one of pivotal equations 24 | null | null | null | physics.gen-ph | null | We open out one of incorrect solutions of the Driac equation in the Coulomb
field given in a published paper. By introducing a transformation of function,
the paper transformed the original radial first-order Dirac-Coulomb equation
into two second-order Dirac-Coulomb equation. However, each of the second-order
differential equations has differential energy eigenvalues set. The original
paper wrote the two differential equations into one of forms, and then gave the
distinguished energy eigenvalues. The mathematical procedure is not correct.
For the same quantum system, introducing a transformation of function yields
two different energy eigenvaluse, the result violates the uniqueness of
solution. It actually shows that the given second-order differential equations
have no solution. On the other hand, the given formal solutions of the
second-order Dirac-Coulomb equations violate the conditions for determining
solution. Consequently, the solutions given by the author are pseudo solution,
and the corresponding energy eigenvalues set is also a pseudo eigenvalues set.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 07:44:16 GMT"
},
{
"version": "v2",
"created": "Fri, 10 Aug 2007 09:22:47 GMT"
}
] | 2011-11-10T00:00:00 | [
[
"Chen",
"Ruida",
""
]
] |
0707.0092 | Changhyun Ahn | Changhyun Ahn | More Meta-Stable Brane Configurations without D6-Branes | 46 pp; 16 figures; improved the introduction and to appear in NPB | Nucl.Phys.B790:281-316,2008 | 10.1016/j.nuclphysb.2007.09.023 | null | hep-th | null | We describe the intersecting brane configurations, consisting of NS-branes,
D4-branes(and anti-D4-branes), in type IIA string theory corresponding to the
meta-stable nonsupersymmetric vacua of N=1 SU(N_c) x SU(N_c') x SU(N_c'') gauge
theory with bifundamentals. By adding the orientifold 4-plane to these brane
configurations, we also discuss the meta-stable brane configurations for other
gauge theory with bifundamentals. Furthermore, we study the intersecting brane
configurations corresponding to the nonsupersymmetric meta-stable vacua of
other gauge theory with bifundamentals, by adding the orientifold 6-plane.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 07:03:57 GMT"
},
{
"version": "v2",
"created": "Fri, 21 Sep 2007 12:57:54 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Ahn",
"Changhyun",
""
]
] |
0707.0093 | Uri Zwick | Mike Paterson, Yuval Peres, Mikkel Thorup, Peter Winkler, Uri Zwick | Maximum overhang | 20 pages, 8 figures | null | null | null | math.HO math-ph math.CO math.MP | null | How far can a stack of $n$ identical blocks be made to hang over the edge of
a table? The question dates back to at least the middle of the 19th century and
the answer to it was widely believed to be of order $\log n$. Recently,
Paterson and Zwick constructed $n$-block stacks with overhangs of order
$n^{1/3}$, exponentially better than previously thought possible. We show here
that order $n^{1/3}$ is indeed best possible, resolving the long-standing
overhang problem up to a constant factor.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 08:13:07 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Paterson",
"Mike",
""
],
[
"Peres",
"Yuval",
""
],
[
"Thorup",
"Mikkel",
""
],
[
"Winkler",
"Peter",
""
],
[
"Zwick",
"Uri",
""
]
] |
0707.0094 | Olivier Lafitte | Olivier Lafitte (LAGA, Cea/List) | Study of the linear ablation growth rate for the quasi isobaric model of
Euler equations with thermal conductivity | Indiana University Mathematical Journal (2007) in press | null | null | null | math.AP | null | In this paper, we study a linear system related to the 2d system of Euler
equations with thermal conduction in the quasi-isobaric approximation of
Kull-Anisimov [14]. This model is used for the study of the ablation front
instability, which appears in the problem of inertial confinement fusion. This
physical system contains a mixing region, in which the density of the gaz
varies quickly, and one denotes by L0 an associated characteristic length. The
system of equations is linearized around a stationary solution, and each
perturbed quantity is written using the normal modes method. The resulting
linear system is not self-adjoint, of order 5, with coefficients depending on x
and on physical parameters $\alpha, \beta$. We calculate Evans function
associated with this linear system, using rigorous constructions of decreasing
at $\pm \infty$ solutions of systems of ODE. We prove that for $\alpha$ small,
there is no bounded solution of the linearized system.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 08:19:13 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Lafitte",
"Olivier",
"",
"LAGA, Cea/List"
]
] |
0707.0095 | Simone Warzel | Michael Aizenman, Francois Germinet, Abel Klein, Simone Warzel | On Bernoulli Decompositions for Random Variables, Concentration Bounds,
and Spectral Localization | null | Probab. Theory Relat. Fields (2009) 143: 219-238 | 10.1007/s00440-007-0125-7 | null | math.PR math-ph math.MP | null | As was noted already by A. N. Kolmogorov, any random variable has a Bernoulli
component. This observation provides a tool for the extension of results which
are known for Bernoulli random variables to arbitrary distributions. Two
applications are provided here: i. an anti-concentration bound for a class of
functions of independent random variables, where probabilistic bounds are
extracted from combinatorial results, and ii. a proof, based on the Bernoulli
case, of spectral localization for random Schroedinger operators with arbitrary
probability distributions for the single site coupling constants. For a general
random variable, the Bernoulli component may be defined so that its conditional
variance is uniformly positive. The natural maximization problem is an optimal
transport question which is also addressed here.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 14:05:01 GMT"
}
] | 2010-10-26T00:00:00 | [
[
"Aizenman",
"Michael",
""
],
[
"Germinet",
"Francois",
""
],
[
"Klein",
"Abel",
""
],
[
"Warzel",
"Simone",
""
]
] |
0707.0096 | Jun Ye | Seth M. Foreman, Andrew D. Ludlow, Marcio H. G. de Miranda, Jason E.
Stalnaker, Scott A. Diddams, and Jun Ye | Coherent optical phase transfer over a 32-km fiber with 1-s instability
at $10^{-17}$ | 4 pages, 4 figures | Phys. Rev. Lett. 99, 153601 (2007). | 10.1103/PhysRevLett.99.153601 | null | physics.atom-ph physics.optics | null | The phase coherence of an ultrastable optical frequency reference is fully
maintained over actively stabilized fiber networks of lengths exceeding 30 km.
For a 7-km link installed in an urban environment, the transfer instability is
$6 \times 10^{-18}$ at 1-s. The excess phase noise of 0.15 rad, integrated from
8 mHz to 25 MHz, yields a total timing jitter of 0.085 fs. A 32-km link
achieves similar performance. Using frequency combs at each end of the
coherent-transfer fiber link, a heterodyne beat between two independent
ultrastable lasers, separated by 3.5 km and 163 THz, achieves a 1-Hz linewidth.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 09:39:55 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Foreman",
"Seth M.",
""
],
[
"Ludlow",
"Andrew D.",
""
],
[
"de Miranda",
"Marcio H. G.",
""
],
[
"Stalnaker",
"Jason E.",
""
],
[
"Diddams",
"Scott A.",
""
],
[
"Ye",
"Jun",
""
]
] |
0707.0097 | Pavel Ginzburg | Pavel Ginzburg and Meir Orenstein | Metal-less Metamaterial for Surface Plasmon Polariton guiding and
amplification | P. Ginzburg, M. Orenstein, "Metal-less Optical Surface Plasmon
Polariton", Conference of Lasers and Electro-Optics CLEO, Baltimore, QThG4,
May 10, (2007) | Journal of Applied Physics, 104, 063513 (2008) | 10.1063/1.2978208 | null | cond-mat.mtrl-sci | null | We propose a novel metamaterial for Surface Plasmon Polarition guiding,
amplification and modulation. Specific example of AlN/GaN Quantum Cascade
Amplifier and its dispersion engineering are studied in details. The general
original concept of metamaterials based on inclusions of low-dimensional
quantum structures (artificial atoms) is discussed.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 09:44:32 GMT"
}
] | 2014-05-21T00:00:00 | [
[
"Ginzburg",
"Pavel",
""
],
[
"Orenstein",
"Meir",
""
]
] |
0707.0098 | Kurt Johansson | Kurt Johansson | A multi-dimensional Markov chain and the Meixner ensemble | 14 pages | null | 10.1007/s11512-008-0089-6 | null | math.PR math-ph math.MP | null | We show that the transition probability of the Markoc chain
$(G(j,1),...,G(j,n))_{j\ge 1}$, where the $G(i,j)'s$ are certain directed
last-passage times, is given by a determinant of a special form. An analogous
formula has recently been obtained by Warren in a Brownian motion model.
Furthermore we demonstrate that this formula leads to the Meixner ensemble when
we compute the distribution function for $G(m,n)$. We also obtain the Fredholm
determinant representation of this distribution, where the kernel has a double
contour integral representation.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 09:48:06 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Johansson",
"Kurt",
""
]
] |
0707.0099 | Raquel Alvarez-Rodriguez | R. Alvarez-Rodriguez, A.S. Jensen, D.V. Fedorov, H.O.U. Fynbo and E.
Garrido | Energy distributions from three-body decaying many-body resonances | 4 pages, 4 figures. Accepted for publication in Physical Review
Letters | Phys.Rev.Lett.99:072503,2007 | 10.1103/PhysRevLett.99.072503 | null | nucl-th | null | We compute energy distributions of three particles emerging from decaying
many-body resonances. We reproduce the measured energy distributions from
decays of two archetypal states chosen as the lowest $0^{+}$ and
$1^{+}$-resonances in $^{12}$C populated in $\beta$-decays. These states are
dominated by sequential, through the $^{8}$Be ground state, and direct decays,
respectively. These decay mechanisms are reflected in the ``dynamic'' evolution
from small, cluster or shell-model states, to large distances, where the
coordinate or momentum space continuum wavefunctions are accurately computed.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 10:07:12 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Alvarez-Rodriguez",
"R.",
""
],
[
"Jensen",
"A. S.",
""
],
[
"Fedorov",
"D. V.",
""
],
[
"Fynbo",
"H. O. U.",
""
],
[
"Garrido",
"E.",
""
]
] |
0707.0100 | Erhan Bayraktar | Erhan Bayraktar, Masahiko Egami | On the One-Dimensional Optimal Switching Problem | Keywords: Optimal switching problem, optimal stopping problem,
It\^{o} diffusions | null | null | null | math.OC math.PR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explicitly solve the optimal switching problem for one-dimensional
diffusions by directly employing the dynamic programming principle and the
excessive characterization of the value function. The shape of the value
function and the smooth fit principle then can be proved using the properties
of concave functions.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 10:14:24 GMT"
},
{
"version": "v2",
"created": "Tue, 3 Jul 2007 02:41:22 GMT"
},
{
"version": "v3",
"created": "Mon, 25 May 2009 13:21:59 GMT"
}
] | 2009-05-25T00:00:00 | [
[
"Bayraktar",
"Erhan",
""
],
[
"Egami",
"Masahiko",
""
]
] |
0707.0101 | Daisuke Yamada | Daiske Yamada | Sakai-Sugimoto Brane System at High Density | 27 pages, In v2, section 3 of v1 is removed and replaced with
comments on the strong coupling regime. Also some references added. v3 is the
published version and title is also modified | JHEP 0810:020,2008 | 10.1088/1126-6708/2008/10/020 | null | hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The D4-D8 brane system of Sakai-Sugimoto model at high quark density is
studied in the weak coupling regime. We show that the color superconducting
phase (for Nc~3) or the chiral density wave (for Nc->infinity) disappears at
very large chemical potential, or equivalently at very large compactified
dimension that the model possesses. We also comment on the prospects in the
strong coupling regime along with the QCD phase diagram.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 10:48:49 GMT"
},
{
"version": "v2",
"created": "Tue, 21 Aug 2007 08:33:58 GMT"
},
{
"version": "v3",
"created": "Sat, 4 Oct 2008 09:14:52 GMT"
}
] | 2009-04-17T00:00:00 | [
[
"Yamada",
"Daiske",
""
]
] |
0707.0102 | Shin-ichi Ohta | Shin-ichi Ohta | Markov type of Alexandrov spaces of nonnegative curvature | 13 pages; v2: minor changes | Mathematika 55 (2009), 177-189 | null | null | math.MG math.FA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove that Alexandrov spaces $X$ of nonnegative curvature have Markov type
2 in the sense of Ball. As a corollary, any Lipschitz continuous map from a
subset of $X$ into a 2-uniformly convex Banach space is extended as a Lipschitz
continuous map on the entire space $X$.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 10:52:11 GMT"
},
{
"version": "v2",
"created": "Tue, 8 Sep 2009 05:53:13 GMT"
},
{
"version": "v3",
"created": "Sat, 8 May 2010 11:17:59 GMT"
}
] | 2010-05-11T00:00:00 | [
[
"Ohta",
"Shin-ichi",
""
]
] |
0707.0103 | Sergey Slabospitsky | A.A. Ashimova (1), S.R. Slabospitsky (2) ((1) Moscow State University,
Moscow, Russia, (2) Institute for High Energy Physics, Protvino, Russia) | Simulation of the Polarized Fermion Decay | 4 pages, 2 EPS figures | null | null | null | hep-ph | null | In this paper the modification of the method conventionally used for the
modeling of the massive fermions production and decays is proposed. The step by
step algorithm is presented. Under the strict conditions the proposed method of
modeling allow distinctly raise the efficiency of the computations.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 11:18:25 GMT"
},
{
"version": "v2",
"created": "Wed, 2 Apr 2008 06:45:03 GMT"
}
] | 2008-04-02T00:00:00 | [
[
"Ashimova",
"A. A.",
""
],
[
"Slabospitsky",
"S. R.",
""
]
] |
0707.0104 | X. H. Chen | T. Wu, C. H. Wang, G. Wu, D. F. Fang, J. L. Luo, G T. Liu and X. H.
Chen | Giant Anisotropy of Magnetoresistance and "Spin Valve" effect in
Antiferromagnetic $Nd_{2-x}Ce_xCuO_{4}$ | 7 pages, 8 figures | Journal of Physics: Condensed Matter 20, 275226(2008) | 10.1088/0953-8984/20/27/275226 | null | cond-mat.supr-con cond-mat.str-el | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have studied anisotropic magnetoresistance (MR) and magnetization with
rotating magnetic field (B) within $CuO_2$ plane in lightly doped AF
$Nd_{2-x}Ce_xCuO_{4}$. \emph{A giant anisotropy} in MR is observed at low
temperature below 5 K. The c-axis resistivity can be tuned about one order of
magnitude just by changing B direction within $CuO_2$ plane and a scaling
behavior between out-of-plane and in-plane MR is found. A "Spin valve" effect
is proposed to understand the giant anisotropy of out-of-plane MR and the
evolution of scaling parameters with the external field. It is found that the
field-induced spin-flop transition of Nd$^{3+}$ layer under high magnetic field
is the key to understand the giant anisotropy. These results suggest that a
novel entanglement between charge and spin dominates the underlying physics.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 11:26:29 GMT"
},
{
"version": "v2",
"created": "Sun, 22 Jul 2007 09:23:02 GMT"
},
{
"version": "v3",
"created": "Fri, 20 Mar 2009 03:03:11 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Wu",
"T.",
""
],
[
"Wang",
"C. H.",
""
],
[
"Wu",
"G.",
""
],
[
"Fang",
"D. F.",
""
],
[
"Luo",
"J. L.",
""
],
[
"Liu",
"G T.",
""
],
[
"Chen",
"X. H.",
""
]
] |
0707.0105 | Aalok Misra | Aalok Misra, Pramod Shukla | Moduli Stabilization, Large-Volume dS Minimum Without anti-D3-Branes,
(Non-)Supersymmetric Black Hole Attractors and Two-Parameter Swiss Cheese
Calabi-Yau's | 1+32 pages, LaTeX; published (in NPB) version - title changed and
some cosmetic changes made on the reviewer's suggestions | Nucl.Phys.B799:165-198,2008 | 10.1016/j.nuclphysb.2008.03.001 | null | hep-th | null | We consider issues of moduli stabilization and "area codes" for type II flux
compactifications, and the "Inverse Problem" and "Fake Superpotentials" for
extremal (non)supersymmetric black holes in type II compactifications on
(orientifold of) a compact two-parameter Calabi-Yau expressed as a degree-18
hypersurface in WCP^4[1,1,1,6,9] which has multiple singular loci in its moduli
space. We argue the existence of extended "area codes" [1] wherein for the same
set of large NS-NS and RR fluxes, one can stabilize all the complex structure
moduli and the axion-dilaton modulus (to different sets of values) for points
in the moduli space away as well as near the different singular conifold loci
leading to the existence of domain walls. Using techniques of [3] we explicitly
show that given a set of moduli and choice of a gauge(the superpotential)
corresponding to an extremal black hole, one can actually work out the
corresponding charges (of the extremal black hole) - the so-called "inverse
problem". We also show the existence of "fake superpotentials" [4]
corresponding to non-BPS extremal black-hole solutions corresponding to the
aforementioned Calabi-Yau three-fold. By including non-perturbative alpha' and
instanton corrections in the Kaehler potential and superpotential [2], we show
the possibility of getting a large-volume non-supersymmetric (A)dS minimum - a
dS minimum without the addition of anti-D3 branes a la KKLT. The chosen
Calabi-Yau has been of relevance also from the point of other studies of
stabilization of the Kaehler moduli via nonperturbative instanton contributions
[5] and the possibility of getting non-supersymmetric AdS vacua (and their
subsequent dS-uplifts) using (alpha')^3 corrections to the Kaehler potential
[6,7,8].
| [
{
"version": "v1",
"created": "Mon, 2 Jul 2007 14:10:30 GMT"
},
{
"version": "v2",
"created": "Tue, 31 Jul 2007 13:57:50 GMT"
},
{
"version": "v3",
"created": "Tue, 23 Oct 2007 12:37:27 GMT"
},
{
"version": "v4",
"created": "Wed, 9 Jan 2008 05:53:45 GMT"
},
{
"version": "v5",
"created": "Fri, 1 Feb 2008 15:23:02 GMT"
},
{
"version": "v6",
"created": "Wed, 5 Mar 2008 13:43:46 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Misra",
"Aalok",
""
],
[
"Shukla",
"Pramod",
""
]
] |
0707.0106 | Sante Carloni | S. Carloni, P. K. S. Dunsby, A. Troisi | The evolution of density perturbations in f(R) gravity | 21 pages, 2 figures, typos corrected, submitted to PRD | Phys.Rev.D77:024024,2008 | 10.1103/PhysRevD.77.024024 | null | gr-qc astro-ph hep-th | null | We give a rigorous and mathematically well defined presentation of the
Covariant and Gauge Invariant theory of scalar perturbations of a
Friedmann-Lemaitre-Robertson-Walker universe for Fourth Order Gravity, where
the matter is described by a perfect fluid with a barotropic equation of state.
The general perturbations equations are applied to a simple background solution
of R^n gravity. We obtain exact solutions of the perturbations equations for
scales much bigger than the Hubble radius. These solutions have a number of
interesting features. In particular, we find that for all values of n there is
always a growing mode for the density contrast, even if the universe undergoes
an accelerated expansion. Such a behaviour does not occur in standard General
Relativity, where as soon as Dark Energy dominates, the density contrast
experiences an unrelenting decay. This peculiarity is sufficiently novel to
warrant further investigation on fourth order gravity models.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 14:42:56 GMT"
},
{
"version": "v2",
"created": "Wed, 4 Jul 2007 10:10:10 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Carloni",
"S.",
""
],
[
"Dunsby",
"P. K. S.",
""
],
[
"Troisi",
"A.",
""
]
] |
0707.0107 | Gareth Alexander | G P Alexander and J M Yeomans | Flexoelectric blue phases | 4 pages, accepted for publication in Phys. Rev. Lett | null | 10.1103/PhysRevLett.99.067801 | null | cond-mat.soft | null | We describe the occurence and properties of liquid crystal phases showing two
dimensional splay and bend distortions which are stabilised by flexoelectric
interactions. These phases are characterised by regions of locally double
splayed order separated by topological defects and are thus highly analogous to
the blue phases of cholesteric liquid crystals. We present a mean field
analysis based upon the Landau--de Gennes Q-tensor theory and construct a phase
diagram for flexoelectric structures using analytic and numerical results. We
stress the similarities and discrepancies between the cholesteric and
flexoelectric cases.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 13:35:24 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Alexander",
"G P",
""
],
[
"Yeomans",
"J M",
""
]
] |
0707.0108 | William P. Minicozzi ii | Tobias H. Colding and William P. Minicozzi II | Width and finite extinction time of Ricci flow | null | null | null | null | math.DG math.GT | null | This is an expository article with complete proofs intended for a general
non-specialist audience. The results are two-fold. First, we discuss a
geometric invariant, that we call the width, of a manifold and show how it can
be realized as the sum of areas of minimal 2-spheres. For instance, when $M$ is
a homotopy 3-sphere, the width is loosely speaking the area of the smallest
2-sphere needed to ``pull over'' $M$. Second, we use this to conclude that
Hamilton's Ricci flow becomes extinct in finite time on any homotopy 3-sphere.
We have chosen to write this since the results and ideas given here are quite
useful and seem to be of interest to a wide audience.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 13:37:47 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Colding",
"Tobias H.",
""
],
[
"Minicozzi",
"William P.",
"II"
]
] |
0707.0109 | Martha Haynes P | Brian R. Kent, Riccardo Giovanelli, Martha P. Haynes, Amelie
Saintonge, Sabrina Stierwalt, Thomas Balonek, Noah Brosch, Barbara Catinella,
Rebecca A. Koopmann, Emmanuel Momjian, Kristine Spekkens | Optically Unseen HI Detections towards the Virgo Cluster detected in the
Arecibo Legacy Fast ALFA Survey | accepted for publication in Ap. J. Letters | null | null | null | astro-ph | null | We report the discovery by the Arecibo Legacy Fast ALFA (ALFALFA) survey of
eight HI features not coincident with stellar counterparts in the Virgo Cluster
region. All of the HI clouds have cz < 3000 km/s and, if at the Virgo distance,
HI masses between 1.9 x 10**7 and 1.1 x 10**9 solar masses. Four of the eight
objects were reported or hinted at by previous studies and "rediscovered" by
ALFALFA. While some clouds appear to be associated with optical galaxies in
their vicinity, others show no clear association with a stellar counterpart.
Two of them are embedded in relatively dense regions of the cluster and are
associated with M49 and M86; they were previously known. The others are mostly
located in peripheral regions of the cluster. Especially notable are a
concentration of objects towards the so-called M cloud, 3 to 5 degrees to the
NW of M87, and a complex of several clouds projected roughly halfway between
M87 and M49. The object referred to as VIRGOHI21 and proposed to be a "dark
galaxy" is also detected and shown to be a tidal feature associated with NGC
4254.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 15:27:42 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Kent",
"Brian R.",
""
],
[
"Giovanelli",
"Riccardo",
""
],
[
"Haynes",
"Martha P.",
""
],
[
"Saintonge",
"Amelie",
""
],
[
"Stierwalt",
"Sabrina",
""
],
[
"Balonek",
"Thomas",
""
],
[
"Brosch",
"Noah",
""
],
[
"Catinella",
"Barbara",
""
],
[
"Koopmann",
"Rebecca A.",
""
],
[
"Momjian",
"Emmanuel",
""
],
[
"Spekkens",
"Kristine",
""
]
] |
0707.0110 | J. Frauendiener | J. Frauendiener and A. Kabobel | The static spherically symmetric body in relativistic elasticity | 19 pages, 8 figures | Class.Quant.Grav.24:4817-4838,2007 | 10.1088/0264-9381/24/18/016 | null | gr-qc | null | In this paper is discussed a class of static spherically symmetric solutions
of the general relativistic elasticity equations. The main point of discussion
is the comparison of two matter models given in terms of their stored energy
functionals, i.e., the rule which gives the amount of energy stored in the
system when it is deformed. Both functionals mimic (and for small deformations
approximate) the classical Kirchhoff-St.Venant materials but differ in the
strain variable used. We discuss the behavior of the systems for large
deformations.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 14:43:30 GMT"
}
] | 2009-04-16T00:00:00 | [
[
"Frauendiener",
"J.",
""
],
[
"Kabobel",
"A.",
""
]
] |
0707.0111 | Hajime Tsuji | Hajime Tsuji | Canonical volume forms on compact K\"{a}hler manifolds | 5pages, no figure | null | null | null | math.AG math.CV | null | We construct a canonical singular hermitian metric with semipositive
curvature current on the canonical line bundle of a compact K\"{a}hler manifold
with pseudoeffective canonical bundle.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 14:50:29 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Tsuji",
"Hajime",
""
]
] |
0707.0112 | Yusuke Sasano | Yusuke Sasano | Holomorphy conditions of Fuji-Suzuki coupled Painlev\'e VI system | 30 pages, 6 figures | null | null | null | math.CA math.DS | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this note, we give some holomorphy conditions of Fuji-Suzuki coupled
Painlev\'e VI system. We also give two translation operators acting on the
constant parameter $\eta$. We note a confluence process from the Fuji-Suzuki
system to the Noumi-Yamada system of type $A_5^{(1)}$.
| [
{
"version": "v1",
"created": "Mon, 2 Jul 2007 14:38:47 GMT"
},
{
"version": "v2",
"created": "Tue, 3 Jul 2007 09:48:05 GMT"
},
{
"version": "v3",
"created": "Wed, 18 Jul 2007 04:15:21 GMT"
},
{
"version": "v4",
"created": "Sun, 2 Oct 2016 12:08:53 GMT"
}
] | 2016-10-04T00:00:00 | [
[
"Sasano",
"Yusuke",
""
]
] |
0707.0113 | Martha Haynes P | Martha P. Haynes, Riccardo Giovanelli, Brian R. Kent | NGC 4254: An Act of Harassment Uncovered by the Arecibo Legacy Fast ALFA
Survey | accepted for publication in Ap.J.(Lett.). higher resolution figure
available at http://egg.astro.cornell.edu/alfalfa/pubs/figs/n4254_f1.eps | null | 10.1086/521188 | null | astro-ph | null | We present an HI map constructed from the Arecibo Legacy Fast ALFA (ALFALFA)
survey of the surroundings of the strongly asymmetric Virgo cluster Sc galaxy
NGC 4254. Noted previously for its lopsided appearance, rich interstellar
medium, and extradisk HI emission, NGC 4254 is believed to be entering the
Virgo environment for the first time and at high speed. The ALFALFA map clearly
shows a long HI tail extending ~250 kpc northward from the galaxy. Embedded as
one condensation within this HI structure is the object previously identified
as a "dark galaxy": Virgo HI21 (Davies et al. 2004). A body of evidence
including its location within and velocity with respect to the cluster and the
appearance and kinematics of its strong spiral pattern, extra-disk HI and
lengthy HI tail is consistent with a picture of "galaxy harassment" as proposed
by Moore et al. (1996a,b; 1998). The smoothly varying radial velocity field
along the tail as it emerges from NGC 4254 can be used as a timing tool, if
interpreted as resulting from the coupling of the rotation of the disk and the
collective gravitational forces associated with the harassment mechanism.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 15:21:27 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Haynes",
"Martha P.",
""
],
[
"Giovanelli",
"Riccardo",
""
],
[
"Kent",
"Brian R.",
""
]
] |
0707.0114 | Nicholas Eriksson | Nicholas Eriksson, Lior Pachter, Yumi Mitsuya, Soo-Yon Rhee, Chunlin
Wang, Baback Gharizadeh, Mostafa Ronaghi, Robert W. Shafer, Niko Beerenwinkel | Viral population estimation using pyrosequencing | 23 pages, 13 figures | null | 10.1371/journal.pcbi.1000074 | null | q-bio.PE | null | The diversity of virus populations within single infected hosts presents a
major difficulty for the natural immune response as well as for vaccine design
and antiviral drug therapy. Recently developed pyrophosphate based sequencing
technologies (pyrosequencing) can be used for quantifying this diversity by
ultra-deep sequencing of virus samples. We present computational methods for
the analysis of such sequence data and apply these techniques to pyrosequencing
data obtained from HIV populations within patients harboring drug resistant
virus strains. Our main result is the estimation of the population structure of
the sample from the pyrosequencing reads. This inference is based on a
statistical approach to error correction, followed by a combinatorial algorithm
for constructing a minimal set of haplotypes that explain the data. Using this
set of explaining haplotypes, we apply a statistical model to infer the
frequencies of the haplotypes in the population via an EM algorithm. We
demonstrate that pyrosequencing reads allow for effective population
reconstruction by extensive simulations and by comparison to 165 sequences
obtained directly from clonal sequencing of four independent, diverse HIV
populations. Thus, pyrosequencing can be used for cost-effective estimation of
the structure of virus populations, promising new insights into viral
evolutionary dynamics and disease control strategies.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 15:36:32 GMT"
},
{
"version": "v2",
"created": "Mon, 21 Jan 2008 19:11:08 GMT"
}
] | 2015-05-13T00:00:00 | [
[
"Eriksson",
"Nicholas",
""
],
[
"Pachter",
"Lior",
""
],
[
"Mitsuya",
"Yumi",
""
],
[
"Rhee",
"Soo-Yon",
""
],
[
"Wang",
"Chunlin",
""
],
[
"Gharizadeh",
"Baback",
""
],
[
"Ronaghi",
"Mostafa",
""
],
[
"Shafer",
"Robert W.",
""
],
[
"Beerenwinkel",
"Niko",
""
]
] |
0707.0115 | Andrew Norris | Andrew N. Norris | Higher derivatives and the inverse derivative of a tensor-valued
function of a tensor | 17 pages | Q. Appl. Math. 66, 725-741, 2008. | null | null | math.SP | null | The n-th derivative of a tensor valued function of a tensor is defined by a
finite number of coefficients each with closed form expression.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 15:38:28 GMT"
},
{
"version": "v2",
"created": "Sat, 7 Jul 2007 21:15:52 GMT"
},
{
"version": "v3",
"created": "Mon, 29 Oct 2007 15:39:39 GMT"
}
] | 2009-01-09T00:00:00 | [
[
"Norris",
"Andrew N.",
""
]
] |
0707.0116 | Enrico Calzavarini | Kazuyasu Sugiyama, Enrico Calzavarini, Siegfried Grossmann, Detlef
Lohse | Non-Oberbeck-Boussinesq effects in two-dimensional Rayleigh-Benard
convection in glycerol | 6 pages, 7 figures | Europhys. Lett. 80, 34002 (2007) | 10.1209/0295-5075/80/34002 | null | physics.flu-dyn | null | We numerically analyze Non-Oberbeck-Boussinesq (NOB) effects in
two-dimensional Rayleigh-Benard flow in glycerol, which shows a dramatic change
in the viscosity with temperature. The results are presented both as functions
of the Rayleigh number (Ra) up to $10^8$ (for fixed temperature difference
between the top and bottom plates) and as functions of
"non-Oberbeck-Boussinesqness'' or "NOBness'' ($\Delta$) up to 50 K (for fixed
Ra). For this large NOBness the center temperature $T_c$ is more than 5 K
larger than the arithmetic mean temperature $T_m$ between top and bottom plate
and only weakly depends on Ra. To physically account for the NOB deviations of
the Nusselt numbers from its Oberbeck-Boussinesq values, we apply the
decomposition of $Nu_{NOB}/Nu_{OB}$ into the product of two effects, namely
first the change in the sum of the top and bottom thermal BL thicknesses, and
second the shift of the center temperature $T_c$ as compared to $T_m$. While
for water the origin of the $Nu$ deviation is totally dominated by the second
effect (cf. Ahlers et al., J. Fluid Mech. 569, pp. 409 (2006)) for glycerol the
first effect is dominating, in spite of the large increase of $T_c$ as compared
to $T_m$.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 15:38:40 GMT"
},
{
"version": "v2",
"created": "Tue, 2 Oct 2007 10:28:04 GMT"
}
] | 2007-10-02T00:00:00 | [
[
"Sugiyama",
"Kazuyasu",
""
],
[
"Calzavarini",
"Enrico",
""
],
[
"Grossmann",
"Siegfried",
""
],
[
"Lohse",
"Detlef",
""
]
] |
0707.0117 | Yair Goldfarb | Yair Goldfarb, Jeremy Schiff and David J Tannor | Complex trajectory method in time-dependent WKB | null | null | 10.1063/1.2907336 | null | quant-ph | null | We present a significant improvement to a time-dependent WKB (TDWKB)
formulation developed by Boiron and Lombardi [JCP {\bf108}, 3431 (1998)] in
which the TDWKB equations are solved along classical trajectories that
propagate in the complex plane. Boiron and Lombardi showed that the method
gives very good agreement with the exact quantum mechanical result as long as
the wavefunction does not exhibit interference effects such as oscillations and
nodes. In this paper we show that this limitation can be overcome by
superposing the contributions of crossing trajectories. We also demonstrate
that the approximation improves when incorporating higher order terms in the
expansion. These improvements could make the TDWKB formulation a competitive
alternative to current time-dependent semiclassical methods.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 16:19:22 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Goldfarb",
"Yair",
""
],
[
"Schiff",
"Jeremy",
""
],
[
"Tannor",
"David J",
""
]
] |
0707.0118 | Syed Noor | Syed Umer Noor (for the ZEUS and H1 collaborations) | Proton Structure Functions at High $Q^{2}$ and High x at HERA | 4 pages and 4 figures. Proceedings for the 2007 Moriond QCD
conference | null | null | null | hep-ex | null | Neutral and charged current deep inelastic scattering cross sections and
structure functions are presented. The review also discusses improvements to
the parton density measurements using jet cross section data and recent high
$Q^{2}$ inclusive cross section measurements. The projected parton density
uncertainties using the entire HERA data set are also presented.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 16:52:11 GMT"
}
] | 2019-08-14T00:00:00 | [
[
"Noor",
"Syed Umer",
"",
"for the ZEUS and H1 collaborations"
]
] |
0707.0119 | Milan Matos | M Matos, A Estrade, M Amthor, A Aprahamian, D Bazin, A Becerril, T
Elliot, D Galaviz, A Gade, S Gupta, G Lorusso, F Montes, J Pereira, M
Portillo, A M Rogers, H Schatz, D Shapira, E Smith, A Stolz and M Wallace | TOF-Brho Mass Measurements of Very Exotic Nuclides for Astrophysical
Calculations at the NSCL | 8 pages, 4 figures, submitted to Journal of Physics G, proceedings of
Nuclear Physics in Astrophysics III | null | 10.1088/0954-3899/35/1/014045 | null | nucl-ex | null | Atomic masses play a crucial role in many nuclear astrophysics calculations.
The lack of experimental values for relevant exotic nuclides triggered a rapid
development of new mass measurement devices around the world. The
Time-of-Flight (TOF) mass measurements offer a complementary technique to the
most precise one, Penning trap measurements, the latter being limited by the
rate and half-lives of the ions of interest. The NSCL facility provides a
well-suited infrastructure for TOF mass measurements of very exotic nuclei. At
this facility, we have recently implemented a TOF-Brho technique and performed
mass measurements of neutron-rich nuclides in the Fe region, important for
r-process calculations and for calculations of processes occurring in the crust
of accreting neutron stars.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 17:41:50 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Matos",
"M",
""
],
[
"Estrade",
"A",
""
],
[
"Amthor",
"M",
""
],
[
"Aprahamian",
"A",
""
],
[
"Bazin",
"D",
""
],
[
"Becerril",
"A",
""
],
[
"Elliot",
"T",
""
],
[
"Galaviz",
"D",
""
],
[
"Gade",
"A",
""
],
[
"Gupta",
"S",
""
],
[
"Lorusso",
"G",
""
],
[
"Montes",
"F",
""
],
[
"Pereira",
"J",
""
],
[
"Portillo",
"M",
""
],
[
"Rogers",
"A M",
""
],
[
"Schatz",
"H",
""
],
[
"Shapira",
"D",
""
],
[
"Smith",
"E",
""
],
[
"Stolz",
"A",
""
],
[
"Wallace",
"M",
""
]
] |
0707.0120 | Jo\~ao Penedones | Lorenzo Cornalba, Miguel S. Costa, Joao Penedones | Eikonal Approximation in AdS/CFT: Resumming the Gravitational Loop
Expansion | 38 pages, 10 figures; reference added in v2 | JHEP 0709:037,2007 | 10.1088/1126-6708/2007/08/019 | ROM2F/2007/11, LPTENS-07/27 | hep-th | null | We derive an eikonal approximation to high energy interactions in Anti-de
Sitter spacetime, by generalizing a position space derivation of the eikonal
amplitude in flat space. We are able to resum, in terms of a generalized phase
shift, ladder and cross ladder graphs associated to the exchange of a spin j
field, to all orders in the coupling constant. Using the AdS/CFT
correspondence, the resulting amplitude determines the behavior of the dual
conformal field theory four point function < O_1 O_2 O_1 O_2 > for small values
of the cross ratios, in a Lorentzian regime. Finally we show that the phase
shift is dominated by graviton exchange and computes, in the dual CFT, the
anomalous dimension of the double trace primary operators O_1 \partial ...
\partial O_2 of large dimension and spin, corresponding to the relative motion
of the two interacting particles. The results are valid at strong t'Hooft
coupling and are exact in the 1/N expansion.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 19:02:30 GMT"
},
{
"version": "v2",
"created": "Thu, 6 Dec 2007 01:04:14 GMT"
}
] | 2009-04-17T00:00:00 | [
[
"Cornalba",
"Lorenzo",
""
],
[
"Costa",
"Miguel S.",
""
],
[
"Penedones",
"Joao",
""
]
] |
0707.0121 | David H. Oaknin | David H. Oaknin | Generation of primordial cosmological density inhomogeneities with scale
invariant power spectrum during the standard radiation dominated expansion of
the universe | Discussion about causality constrains expanded. In this new version
the assumption of fluid incompressibility has been eliminated. Abstract
revised. Conclusions unchanged | null | null | null | astro-ph gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The most distinctive feature of the primordial density inhomogeneities that
existed in the cosmic plasma at the instant of decoupling is their scale
invariant power spectrum ${\cal P}(k) \sim k$ over the range $k \ll H_{eq}$ of
modes with cosmologically large comoving wavelength. We characterize this
feature in real space, in terms of their correlation function at two points. We
show that over cosmologically large comoving distances $r \gg H^{-1}_{eq}$ the
primordial inhomogeneities were (anti)correlated as $f(r) \sim - r^{-4}$. We
revisit the so-called {\it origin of structures problem} of the standard
cosmology at the light of this observation. Our conclusions contradict the
current wisdom on this issue.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 18:28:52 GMT"
},
{
"version": "v2",
"created": "Sun, 23 Mar 2008 22:09:25 GMT"
},
{
"version": "v3",
"created": "Thu, 23 Oct 2008 00:54:04 GMT"
}
] | 2008-10-23T00:00:00 | [
[
"Oaknin",
"David H.",
""
]
] |
0707.0122 | G. S. Bisnovatyi-Kogan | Gennady Bisnovatyi-Kogan | Jet confinement by magneto-torsional oscillations | accepted for publication in Astrophysics and Space Science | Astrophys.SpaceSci.311:287-292,2007 | 10.1007/s10509-007-9564-y | null | astro-ph | null | Many quasars and active galactic nuclei (AGN) appear in radio, optical, and
X-ray maps, as a bright nuclear sources from which emerge single or double
long, thin jets. When observed with high angular resolution these jets show
structure with bright knots separated by relatively dark regions. Nonthermal
nature of a jet radiation is well explained as the synchrotron radiation of the
relativistic electrons in an ordered magnetic field. We consider magnetic
collimation, connected with torsional oscillations of a cylinder with elongated
magnetic field, and periodically distributed initial rotation around the
cylinder axis. The stabilizing azimuthal magnetic field is created here by
torsional oscillations, where charge separation is not necessary. Approximate
simplified model is developed. Ordinary differential equation is derived, and
solved numerically, what gives a possibility to estimate quantitatively the
range of parameters where jets may be stabilized by torsional oscillations.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 18:29:52 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Bisnovatyi-Kogan",
"Gennady",
""
]
] |
0707.0123 | Richard Hollis | R.S.Hollis (STAR Collaboration) | Identified particle measurements at large transverse momenta in Cu+Cu
collisions at RHIC | 8 pages 4 figures, Proceedings for the 23rd Winter Workshop on
Nuclear Dynamics | null | null | null | nucl-ex | null | Differential measurements of various particle species over an extended
momentum range provide a sensitive experimental tool for investigation of
energy loss mechanisms in the medium created in nucleus-nucleus collisions at
RHIC. In these proceedings, a systematic study of transverse momentum spectra
for charged pions, protons and antiprotons from Cu+Cu data at
$\sqrt{s_{NN}}=200$GeV as a function of collision centrality will be presented.
Such systematic studies provide additional insights into the interplay between
fragmentation and non-fragmentation contributions to the particle production.
To investigate system size effects on energy loss, a comparison of top energy
results for Cu+Cu and Au+Au collision systems are made.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 18:51:48 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Hollis",
"R. S.",
"",
"STAR Collaboration"
]
] |
0707.0124 | Bouzar Chikh | Chikh Bouzar, Khaled Benmeriem | Generalized Gevrey ultradistributions | null | New York J. Math., Vol. 15, p. 37-72. (2009) | null | null | math.FA math.AP | null | We first introduce new algebras of generalized functions containing Gevrey
ultradistributions and then develop a Gevrey microlocal analysis suitable for
these algebras. Finally, we give an application through an extension of the
well-known H\"{o}rmander's theorem on the wave front of the product of two
distributions.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 19:08:33 GMT"
}
] | 2011-02-22T00:00:00 | [
[
"Bouzar",
"Chikh",
""
],
[
"Benmeriem",
"Khaled",
""
]
] |
0707.0125 | Richard Hollis | R.S.Hollis (PHOBOS Collaboration) | The importance of the initial geometry in heavy in collisions | 5 pages, 3 figures. Proceedings for the 42nd Moriond conference, La
Thuille Italy | null | null | null | nucl-ex | null | Elliptic flow, elliptic flow fluctuations and fluctuations in the initial
geometry point to a description of nuclear collisions that is driven by the
initial geometry, a quantity which appears to be imprinted from the instant of
the collision. In these proceedings, recent results from the PHOBOS
collaboration are discussed in the context of the importance of the collision
geometry.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 19:29:57 GMT"
}
] | 2007-07-03T00:00:00 | [
[
"Hollis",
"R. S.",
"",
"PHOBOS Collaboration"
]
] |
0707.0126 | I. V. Zozoulenko | S. Ihnatsenka and I. V. Zozoulenko | Quantum wires in magnetic field: A comparative study of the Hartree-Fock
and the spin density functional approaches | 5 pages, 3 figures | J. Phys.: Condens. Matter 20, 335233 (2008) | 10.1088/0953-8984/20/33/335233 | null | cond-mat.mes-hall | null | We present a detailed comparison of the self-consistent calculations based on
the Hartree-Fock and the spin density functional theory for a spit-gate quantum
wire in the IQH regime. We demonstrate that both approaches provide
qualitatively (and in most cases quantitatively) similar results for the
spin-resolved electron density, spin polarization, spatial spin separation at
the edges and the effective $g$ factor. The both approach give the same values
of the magnetic fields corresponding to the successive subband depopulation and
qualitatively similar evolution of the magnetosubbands. Quantitatively,
however, the HF and the DFT subbands are different (even though the
corresponding total electron densities are practically the same). In contrast
to the HF approach, the DFT calculations predict much larger spatial spin
separation near the wire edge for the low magnetic fields (when the
compressible strips for spinless electrons are not formed yet). In the opposite
limit of the large fields, the Hatree-Fock and the DFT approaches give very
similar values for the spatial spin separation.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 20:05:23 GMT"
}
] | 2009-05-26T00:00:00 | [
[
"Ihnatsenka",
"S.",
""
],
[
"Zozoulenko",
"I. V.",
""
]
] |
0707.0127 | Giles Novak | H. Li, C. D. Dowell, L. Kirby, G. Novak, and J. E. Vaillancourt | Design and Initial Performance of SHARP, a Polarimeter for the SHARC-II
Camera at the Caltech Submillimeter Observatory | submitted to Applied Optics | null | 10.1364/AO.47.000422 | null | astro-ph | null | We have developed a fore-optics module that converts the SHARC-II camera at
the Caltech Submillimeter Observatory into a sensitive imaging polarimeter at
wavelengths of 350 and 450 microns. We refer to this module as "SHARP". SHARP
splits the incident radiation into two orthogonally polarized beams that are
then re-imaged onto opposite ends of the 32 x 12 pixel detector array in
SHARC-II. A rotating half-wave plate is used just upstream from the
polarization-splitting optics. The effect of SHARP is to convert SHARC-II into
a dual-beam 12 x 12 pixel polarimeter. A novel feature of SHARP's design is the
use of a crossed grid in a submillimeter polarimeter. Here we describe the
detailed optical design of SHARP and present results of tests carried out
during our first few observing runs. At 350 microns, the beam size (9
arcseconds), throughput (75%), and instrumental polarization (< 1%) are all
very close to our design goals.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 21:20:53 GMT"
}
] | 2015-05-13T00:00:00 | [
[
"Li",
"H.",
""
],
[
"Dowell",
"C. D.",
""
],
[
"Kirby",
"L.",
""
],
[
"Novak",
"G.",
""
],
[
"Vaillancourt",
"J. E.",
""
]
] |
0707.0128 | John T. Whelan | Reinhard Prix and John T. Whelan | F-statistic search for white-dwarf binaries in the first Mock LISA Data
Challenge | submitted to CQG for proceedings of 11th GW Data Analysis workshop | Class.Quant.Grav.24:S565-S574,2007 | 10.1088/0264-9381/24/19/S19 | LIGO-P070029-01-Z | gr-qc | null | The F-statistic is an optimal detection statistic for continuous
gravitational waves, i.e., long-duration (quasi-)monochromatic signals with
slowly-varying intrinsic frequency. This method was originally developed in the
context of ground-based detectors, but it is equally applicable to LISA where
many signals fall into this class of signals. We report on the application of a
LIGO/GEO F-statistic code to LISA data-analysis using the long-wavelength limit
(LWL), and we present results of our search for white-dwarf binary signals in
the first Mock LISA Data Challenge. Somewhat surprisingly, the LWL is found to
be sufficient -- even at high frequencies -- for detection of signals and their
accurate localization on the sky and in frequency, while a more accurate
modelling of the TDI response only seems necessary to correctly estimate the
four amplitude parameters.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 21:37:34 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Prix",
"Reinhard",
""
],
[
"Whelan",
"John T.",
""
]
] |
0707.0129 | Laurentiu Maxim | Laurentiu G. Maxim, Joerg Schuermann | Hodge-theoretic Atiyah-Meyer formulae and the stratified multiplicative
property | Revised version to be published in the Proceedings of the School and
Workshop on the Geometry and Topology of Singularities (L^e Fest). Few typos
corrected and some cosmetic changes | null | null | null | math.AG math.AT | null | In this note we survey Hodge-theoretic formulae of Atiyah-Meyer type for
genera and characteristic classes of complex algebraic varieties, and derive
some new and interesting applications. We also present various extensions to
the singular setting of the Chern-Hirzebruch-Serre signature formula.
| [
{
"version": "v1",
"created": "Sun, 1 Jul 2007 21:39:08 GMT"
},
{
"version": "v2",
"created": "Fri, 7 Mar 2008 23:03:21 GMT"
}
] | 2008-03-08T00:00:00 | [
[
"Maxim",
"Laurentiu G.",
""
],
[
"Schuermann",
"Joerg",
""
]
] |
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