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| versions
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sequence |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0706.1614 | Corinne Touati | Arnaud Legrand (INRIA Rh\^one-Alpes / Id-Imag, Lig), Corinne Touati
(INRIA Rh\^one-Alpes / Id-Imag, Lig) | Non-Cooperative Scheduling of Multiple Bag-of-Task Applications | null | Dans INFOCOM (2007) | null | null | cs.DC cs.GT | null | Multiple applications that execute concurrently on heterogeneous platforms
compete for CPU and network resources. In this paper we analyze the behavior of
$K$ non-cooperative schedulers using the optimal strategy that maximize their
efficiency while fairness is ensured at a system level ignoring applications
characteristics. We limit our study to simple single-level master-worker
platforms and to the case where each scheduler is in charge of a single
application consisting of a large number of independent tasks. The tasks of a
given application all have the same computation and communication requirements,
but these requirements can vary from one application to another. In this
context, we assume that each scheduler aims at maximizing its throughput. We
give closed-form formula of the equilibrium reached by such a system and study
its performance. We characterize the situations where this Nash equilibrium is
optimal (in the Pareto sense) and show that even though no catastrophic
situation (Braess-like paradox) can occur, such an equilibrium can be
arbitrarily bad for any classical performance measure.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 06:39:33 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Legrand",
"Arnaud",
"",
"INRIA Rhône-Alpes / Id-Imag, Lig"
],
[
"Touati",
"Corinne",
"",
"INRIA Rhône-Alpes / Id-Imag, Lig"
]
] |
0706.1615 | Taras Lakoba | T.I. Lakoba and J. Yang | A mode elimination technique to improve convergence of iteration methods
for finding solitary waves | to appear in J. Comp. Phys.; 24 pages | null | 10.1016/j.jcp.2007.06.010 | null | nlin.PS | null | We extend the key idea behind the generalized Petviashvili method of Ref.
\cite{gP} by proposing a novel technique based on a similar idea. This
technique systematically eliminates from the iteratively obtained solution a
mode that is "responsible" either for the divergence or the slow convergence of
the iterations. We demonstrate, theoretically and with examples, that this mode
elimination technique can be used both to obtain some nonfundamental solitary
waves and to considerably accelerate convergence of various iteration methods.
As a collateral result, we compare the linearized iteration operators for the
generalized Petviashvili method and the well-known imaginary-time evolution
method and explain how their different structures account for the differences
in the convergence rates of these two methods.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 19:07:51 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Lakoba",
"T. I.",
""
],
[
"Yang",
"J.",
""
]
] |
0706.1616 | Peter Markos | J Brndiar, R. Derian, P. Markos | Generalized DMPK equation for strongly localized regime - numerical
solution | null | Phys. Ref. B 76, 155320 (2007) | 10.1103/PhysRevB.76.155320 | null | cond-mat.mes-hall | null | Generalized Dorokhov-Mello-Pereyra-Kumar (GDMPK) equation [K. A. Muttalib and
J. R. Klauder, Phys. Rev. Lett. {\bf 82}, 4272 (1999)] has been proposed for
the description of the electron transport in strongly localized systems. We
develop an algorithm for the numerical solution of this equation and confirm
that GDMPK equation correctly describes the critical and localized regimes.
Contrary to the original DMPK equation, the generalized one contains also an
information about the dimension of the system. In particular, it distinguishes
between the two and the three dimensional models with the same number of
transmission channels.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 12:26:43 GMT"
}
] | 2007-10-25T00:00:00 | [
[
"Brndiar",
"J",
""
],
[
"Derian",
"R.",
""
],
[
"Markos",
"P.",
""
]
] |
0706.1617 | Krzysztof R. Apt | Krzysztof R. Apt | Relative Strength of Strategy Elimination Procedures | 8 pages | Economics Bulletin, Vol. 3, no. 21, pp. 1-9 (2007) | null | null | cs.GT | null | We compare here the relative strength of four widely used procedures on
finite strategic games: iterated elimination of weakly/strictly dominated
strategies by a pure/mixed strategy. A complication is that none of these
procedures is based on a monotonic operator. To deal with this problem we use
'global' versions of these operators.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 07:02:13 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Apt",
"Krzysztof R.",
""
]
] |
0706.1618 | Naoki Sasakura | Naoki Sasakura | The fluctuation spectra around a Gaussian classical solution of a tensor
model and the general relativity | 29 pages, 13 figures | Int.J.Mod.Phys.A23:693-718,2008 | 10.1142/S0217751X08038536 | YITP-07-32 | hep-th gr-qc | null | Tensor models can be interpreted as theory of dynamical fuzzy spaces. In this
paper, I study numerically the fluctuation spectra around a Gaussian classical
solution of a tensor model, which represents a fuzzy flat space in arbitrary
dimensions. It is found that the momentum distribution of the low-lying
low-momentum spectra is in agreement with that of the metric tensor modulo the
general coordinate transformation in the general relativity at least in the
dimensions studied numerically, i.e. one to four dimensions. This result
suggests that the effective field theory around the solution is described in a
similar manner as the general relativity.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 07:26:50 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Sasakura",
"Naoki",
""
]
] |
0706.1619 | Elisa Ercolessi | E. Ercolessi, A. Ibort, G. Marmo and G. Morandi | Alternative linear structures for classical and quantum systems | 32 pages, two figures, to be published in IJMPA | Int.J.Mod.Phys.A22:3039-3064,2007 | 10.1142/S0217751X07036890 | null | quant-ph | null | The possibility of deforming the (associative or Lie) product to obtain
alternative descriptions for a given classical or quantum system has been
considered in many papers. Here we discuss the possibility of obtaining some
novel alternative descriptions by changing the linear structure instead. In
particular we show how it is possible to construct alternative linear
structures on the tangent bundle TQ of some classical configuration space Q
that can be considered as "adapted" to the given dynamical system. This fact
opens the possibility to use the Weyl scheme to quantize the system in
different non equivalent ways, "evading", so to speak, the von Neumann
uniqueness theorem.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 07:33:40 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Ercolessi",
"E.",
""
],
[
"Ibort",
"A.",
""
],
[
"Marmo",
"G.",
""
],
[
"Morandi",
"G.",
""
]
] |
0706.1620 | Antonio Ruotolo | A. Ruotolo, C.Y. Lam, W.F. Cheng, K.H. Wong and C.W. Leung | High-quality all-oxide Schottky junctions fabricated on heavily Nb-doped
SrTiO3 substrates | 10 pages, 9 figures | null | 10.1103/PhysRevB.76.075122 | null | cond-mat.str-el | null | We present a detailed investigation of the electrical properties of epitaxial
La0.7Sr0.3MnO3/SrTi0.98Nb0.02O3 Schottky junctions. A fabrication process that
allows reduction of the junction dimensions to current electronic device size
has been employed. A heavily doped semiconductor has been used as a substrate
in order to suppress its series resistance. We show that, unlike standard
semiconductors, high-quality oxide-based Schottky junctions maintain a highly
rectifying behavior for doping concentration of the semiconductor larger than
10^20 cm^(-3). Moreover, the junctions show hysteretic current-voltage
characteristics.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 07:34:11 GMT"
},
{
"version": "v2",
"created": "Fri, 15 Jun 2007 03:19:25 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Ruotolo",
"A.",
""
],
[
"Lam",
"C. Y.",
""
],
[
"Cheng",
"W. F.",
""
],
[
"Wong",
"K. H.",
""
],
[
"Leung",
"C. W.",
""
]
] |
0706.1621 | Yves Benoist | Yves Benoist, Hee Oh | Effective equidistribution of S-integral points on symmetric varieties | 46 pages | null | null | null | math.NT math.MG | null | Let K be a global field of characteristic not 2. Let Z be a symmetric variety
defined over K and S a finite set of places of K. We obtain counting and
equidistribution results for the S-integral points of Z. Our results are
effective when K is a number field.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 07:49:11 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Benoist",
"Yves",
""
],
[
"Oh",
"Hee",
""
]
] |
0706.1622 | Duccio Fanelli | Andrea Antoniazzi, Duccio Fanelli, Stefano Ruffo, Yoshiyuki Y.
Yamaguchi | Out-of-equilibrium tricritical point in a system with long-range
interactions | Physical Review Letters (2007) | null | 10.1103/PhysRevLett.99.040601 | null | cond-mat.stat-mech | null | Systems with long-range interactions display a short-time relaxation towards
Quasi Stationary States (QSSs) whose lifetime increases with system size. With
reference to the Hamiltonian Mean Field (HMF) model, we here show that a
maximum entropy principle, based on Lynden-Bell's pioneering idea of "violent
relaxation", predicts the presence of out-of-equilibrium phase transitions
separating the relaxation towards homogeneous (zero magnetization) or
inhomogeneous (non zero magnetization) QSSs. When varying the initial condition
within a family of "water-bags" with different initial magnetization and
energy, first and second order phase transition lines are found that merge at
an out--of--equilibrium tricritical point. Metastability is theoretically
predicted and numerically checked around the first-order phase transition line.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 07:49:19 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Antoniazzi",
"Andrea",
""
],
[
"Fanelli",
"Duccio",
""
],
[
"Ruffo",
"Stefano",
""
],
[
"Yamaguchi",
"Yoshiyuki Y.",
""
]
] |
0706.1623 | Antonino Francesco Lanza | Antonino F. Lanza | Angular momentum conservation and torsional oscillations in the Sun and
solar-like stars | 13 pages, 12 figures, accepted by Astronomy & Astrophysics | null | 10.1051/0004-6361:20077418 | null | astro-ph | null | The solar torsional oscillations, i.e., the perturbations of the angular
velocity of rotation associated with the eleven-year activity cycle, are a
manifestation of the interaction among the interior magnetic fields, amplified
and modulated by the solar dynamo, and rotation, meridional flow and turbulent
thermal transport. Therefore, they can be used, at least in principle, to put
constraints on that interaction. Similar phenomena are expected to be observed
in solar-like stars and can be modelled to shed light on analogous interactions
in different environments. The source of the torsional oscillations is
investigated by means of a model for the angular momentum transport within the
convection zone. A description of the torsional oscillations is introduced,
based on an analytical solution of the angular momentum equation in the
mean-field approach. It provides information on the intensity and location of
the torques producing the redistribution of the angular momentum within the
convection zone of the Sun along the activity cycle. The method can be extended
to solar-like stars for which some information on the time-dependence of the
differential rotation is becoming available. Illustrative applications to the
Sun and solar-like stars are presented. Under the hypothesis that the solar
torsional oscillations are due to the mean-field Lorentz force, the mean
amplitude of the Maxwell stresses and the phase relationship between poloidal
and toroidal field components are obtained. Our preliminary results show the
capability of the proposed approach to constrain the amplitude, phase and
location of the perturbations leading to the observed torsional oscillations.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 11:18:27 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Lanza",
"Antonino F.",
""
]
] |
0706.1624 | Andrey Tlatov | A. G. Tlatov | Some notes concerning the prediction of the amplitude of the two solar
activity cycles | 5 pages, 5 figures | null | null | null | astro-ph | null | The parameter G, which is determined from the general number of sunspots
groups Ng according to the daily observations G=Sum(1/Ng)^2, is offered. This
parameter is calculated for the days when there is at least one sunspots group.
It characterizes the minimum epoch solar activity. Parameter G mounts to the
maximum during the epoch close to the minimal activity of sunspots. According
too the data of the sequence of sunspots group in Greenwich-USAF/NOAA
observatory format, observation data of Kislovodsk solar station and also daily
Wolf number the changes of parameter G during 100 years were reconstructed. It
is demonstrated in the paper that parameter G's amplitude in minimal solar
activity n is linked with the sunspot cycle's amplitude Wn+1. The 24th activity
cycle prediction is calculated, which makes W24=135(+/-12).
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 08:09:49 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Tlatov",
"A. G.",
""
]
] |
0706.1625 | Mikhail G. Katz | Alexander N. Dranishnikov, Mikhail G. Katz, Yuli B. Rudyak | Small values of Lusternik-Schnirelmann and systolic categories for
manifolds | 22 pages; new section added | null | null | null | math.AT math.DG | null | We prove that manifolds of Lusternik-Schnirelmann category 2 necessarily have
free fundamental group. We thus settle a 1992 conjecture of Gomez-Larranaga and
Gonzalez-Acuna, by generalizing their result in dimension 3, to all higher
dimensions. We examine its ramifications in systolic topology, and provide a
sufficient condition for ensuring a lower bound of 3 for systolic category.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 16:28:20 GMT"
},
{
"version": "v2",
"created": "Thu, 14 Jun 2007 14:10:26 GMT"
},
{
"version": "v3",
"created": "Mon, 23 Jul 2007 09:24:08 GMT"
}
] | 2007-07-23T00:00:00 | [
[
"Dranishnikov",
"Alexander N.",
""
],
[
"Katz",
"Mikhail G.",
""
],
[
"Rudyak",
"Yuli B.",
""
]
] |
0706.1626 | Koji Sugitani | Koji Sugitani, Makoto Watanabe, Motohide Tamura, Ryo Kandori, J. H.
Hough, Shogo Nishiyama, Yasushi Nakajima, Nobuhiko Kusakabe, Jun Hashimoto,
Takahiro Nagayama, Chie Nagashima, Daisuke Kato, Naoya Fukuda | Near-Infrared Polarimetry of the Eagle Nebula (M16) | 9 figures, PASJ, Vol. 59, No. 3, June 25, 2007 | null | null | null | astro-ph | null | We carried out deep and wide (about 8' x 8') JHKs imaging polarimetry in the
southern region of the Eagle Nebula (M16). The polarization intensity map
reveals that two YSOs with near-IR reflection nebulae are located at the tips
of two famous molecular pillars (Pillars 1 and 2) facing toward the exciting
stars of M16. The centrosymmetric polarization pattern are consistent with
those around class I objects having circumstellar envelopes, confirming that
star formation is now taking place at the two tips of the pillars under the
influence of UV radiation from the exciting stars. Polarization measurements of
point sources show that magnetic fields are aligned along some of the pillars
but in a direction that is quite different to the global structure in M16.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 08:21:54 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Sugitani",
"Koji",
""
],
[
"Watanabe",
"Makoto",
""
],
[
"Tamura",
"Motohide",
""
],
[
"Kandori",
"Ryo",
""
],
[
"Hough",
"J. H.",
""
],
[
"Nishiyama",
"Shogo",
""
],
[
"Nakajima",
"Yasushi",
""
],
[
"Kusakabe",
"Nobuhiko",
""
],
[
"Hashimoto",
"Jun",
""
],
[
"Nagayama",
"Takahiro",
""
],
[
"Nagashima",
"Chie",
""
],
[
"Kato",
"Daisuke",
""
],
[
"Fukuda",
"Naoya",
""
]
] |
0706.1627 | Mark Sadgrove | Mark Sadgrove, Munekazu Horikoshi, Tetsuo Sekimura, Ken'ichi Nakagawa | Rectified momentum transport for a kicked Bose-Einstein Condensate | 4 Pages, 4 Figures. Accepted for publication Phys. Rev. Lett. June
2007 | null | 10.1103/PhysRevLett.99.043002 | null | quant-ph | null | We report the experimental observation of rectified momentum transport for a
Bose-Einstein Condensate kicked at the Talbot time (quantum resonance) by an
optical standing wave. Atoms are initially prepared in a superposition of the 0
and -2*hbar*kl momentum states using an optical pi/2 pulse. By changing the
relative phase of the superposed states, a momentum current in either direction
along the standing wave may be produced. We offer an interpretation based on
matter wave interference, showing that the observed effect is uniquely quantum.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 08:29:41 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Sadgrove",
"Mark",
""
],
[
"Horikoshi",
"Munekazu",
""
],
[
"Sekimura",
"Tetsuo",
""
],
[
"Nakagawa",
"Ken'ichi",
""
]
] |
0706.1628 | Alexander Volya | Tony Sumaryada and Alexander Volya | Thermodynamics of pairing in mesoscopic systems | 19 pages, 24 figures | Phys.Rev.C76:024319,2007 | 10.1103/PhysRevC.76.024319 | null | nucl-th | null | Using numerical and analytical methods implemented for different models we
conduct a systematic study of thermodynamic properties of pairing correlation
in mesoscopic nuclear systems. Various quantities are calculated and analyzed
using the exact solution of pairing. An in-depth comparison of canonical, grand
canonical, and microcanonical ensemble is conducted. The nature of the pairing
phase transition in a small system is of a particular interest. We discuss the
onset of discontinuity in the thermodynamic variables, fluctuations, and
evolution of zeros of the canonical and grand canonical partition functions in
the complex plane. The behavior of the Invariant Correlational Entropy is also
studied in the transitional region of interest. The change in the character of
the phase transition due to the presence of magnetic field is discussed along
with studies of superconducting thermodynamics.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 08:29:49 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Sumaryada",
"Tony",
""
],
[
"Volya",
"Alexander",
""
]
] |
0706.1629 | Yun-Song Piao | Yun-Song Piao | Emergently Thermalized Islands in the Landscape | 4 pages, 1 eps figure, contents added and discussions extended,
publish in PLB | Phys.Lett.B659:839-842,2008 | 10.1016/j.physletb.2007.12.009 | null | gr-qc | null | In this note, we point out that in the eternal inflation driven by the
metastable vacua of the landscape, it might be possible that some large and
local quantum fluctuations with the null energy condition violation can stride
over the barriers between different vacua and straightly create some islands
with radiation and matter in new vacua. Then these thermalized islands will
evolve with the standard cosmology. We show that such islands may be consistent
with our observable universe, while has some distinctly observable signals,
which may be tested in coming observations.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 08:32:14 GMT"
},
{
"version": "v2",
"created": "Tue, 8 Jan 2008 11:40:37 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Piao",
"Yun-Song",
""
]
] |
0706.1630 | ILki Kim | Ilki Kim | An analytic study of the ionization from an ultrathin quantum well in a
weak electrostatic field | 3 figures | null | null | null | quant-ph | null | We consider the time evolution of a particle bound by an attractive
one-dimensional delta-function potential (at x = 0) when a uniform
electrostatic field (F) is applied. We explore explicit expressions for the
time-dependent wavefunction \psi_F(x,t) and the ionization probability
{\mathcal{P}}(t), respectively, in the weak-field limit. In doing so,
\psi_F(0,t) is a key element to their evaluation. We obtain a closed expression
for \psi_F(0,t) which is an excellent approximation of the exact result being a
numerical solution of the Lippmann-Schwinger integral equation. The resulting
probability density |\psi_F(0,t)|^2, as a simple alternative to
{\mathcal{P}}(t), is also in good agreement to its counterpart from the exact
one. In doing this, we also find a new and useful integral identity of the Airy
function.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 08:38:00 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Kim",
"Ilki",
""
]
] |
0706.1631 | Suppiya Siranan | Edouard B. Manoukian and Suppiya Siranan | Action Principle and Algebraic Approach to Gauge Transformations in
Gauge Theories | LaTeX, 12 pages, Corrected typos | Int.J.Theor.Phys.44:53-62,2005 | 10.1007/s10773-005-1436-z | null | hep-th | null | The action principle is used to derive, by an entirely algebraic approach,
gauge transformations of the full vacuum-to-vacuum transition amplitude
(generating functional) from the Coulomb gauge to arbitrary covariant gauges
and in turn to the celebrated Fock-Schwinger (FS) gauge for the abelian (QED)
gauge theory without recourse to path integrals or to commutation rules and
without making use of delta functionals. The interest in the FS gauge, in
particular, is that it leads to Faddeev-Popov ghosts-free non-abelian gauge
theories. This method is expected to be applicable to non-abelian gauge
theories including supersymmetric ones.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 08:49:13 GMT"
},
{
"version": "v2",
"created": "Tue, 19 Jun 2007 10:52:42 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Manoukian",
"Edouard B.",
""
],
[
"Siranan",
"Suppiya",
""
]
] |
0706.1632 | Yvan Velenik | Yvan Velenik | Wetting of gradient fields: pathwise estimates | Some typos removed after proofreading. Version to be published in
PTRF | Probab. Theory Related Fields, Vol. 143, Nr. 3-4 (2009) , p.
379--399 | 10.1007/s00440-007-0130-x | null | math.PR math-ph math.MP | null | We consider the wetting transition in the framework of an effective interface
model of gradient type, in dimension 2 and higher. We prove pathwise estimates
showing that the interface is localized in the whole thermodynamically-defined
partial wetting regime considered in earlier works. Moreover, we study how the
interface delocalizes as the wetting transition is approached. Our main tool is
reflection positivity in the form of the chessboard estimate.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 08:44:19 GMT"
},
{
"version": "v2",
"created": "Thu, 18 Oct 2007 10:42:02 GMT"
},
{
"version": "v3",
"created": "Wed, 12 Dec 2007 08:42:03 GMT"
},
{
"version": "v4",
"created": "Tue, 15 Jan 2008 08:09:04 GMT"
}
] | 2011-08-25T00:00:00 | [
[
"Velenik",
"Yvan",
""
]
] |
0706.1633 | Giorgio Cinacchi | Giorgio Cinacchi, Yuri Martinez-Raton, Luis Mederos, Guillelmo
Navascues, Alessandro Tani, Enrique Velasco | Large Attractive Depletion Interactions in Soft Repulsive-Sphere Binary
Mixtures | 31 pages, 8 figures; version accepted for publication in the Journal
of Chemical Physics | J. Chem. Phys. 127, 214501 (2007) | 10.1063/1.2804330 | null | cond-mat.soft cond-mat.stat-mech | null | We consider binary mixtures of soft repulsive spherical particles and
calculate the depletion interaction between two big spheres mediated by the
fluid of small spheres, using different theoretical and simulation methods. The
validity of the theoretical approach, a virial expansion in terms of the
density of the small spheres, is checked against simulation results. Attention
is given to the approach toward the hard-sphere limit, and to the effect of
density and temperature on the strength of the depletion potential. Our results
indicate, surprisingly, that even a modest degree of softness in the pair
potential governing the direct interactions between the particles may lead to a
significantly more attractive total effective potential for the big spheres
than in the hard-sphere case. This might lead to significant differences in
phase behavior, structure and dynamics of a binary mixture of soft repulsive
spheres. In particular, a perturbative scheme is applied to predict the phase
diagram of an effective system of big spheres interacting via depletion forces
for a size ratio of small and big spheres of 0.2; this diagram includes the
usual fluid-solid transition but, in the soft-sphere case, the metastable
fluid-fluid transition, which is probably absent in hard-sphere mixtures, is
close to being stable with respect to direct fluid-solid coexistence. From
these results the interesting possibility arises that, for sufficiently soft
repulsive particles, this phase transition could become stable. Possible
implications for the phase behavior of real colloidal dispersions are
discussed.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 08:48:13 GMT"
},
{
"version": "v2",
"created": "Thu, 11 Oct 2007 08:35:53 GMT"
}
] | 2019-03-18T00:00:00 | [
[
"Cinacchi",
"Giorgio",
""
],
[
"Martinez-Raton",
"Yuri",
""
],
[
"Mederos",
"Luis",
""
],
[
"Navascues",
"Guillelmo",
""
],
[
"Tani",
"Alessandro",
""
],
[
"Velasco",
"Enrique",
""
]
] |
0706.1634 | Elias Jarlebring | Elias Jarlebring | Critical Delays and Polynomial Eigenvalue Problems | null | null | null | null | math.NA | null | In this work we present a new method to compute the delays of delay
differential equations (DDEs), such that the DDE has a purely imaginary
eigenvalue. For delay differential equations with multiple delays, the critical
curves or critical surfaces in delay space (that is, the set of delays where
the DDE has a purely imaginary eigenvalue) are parameterized. We show how the
method is related to other works in the field by treating the case where the
delays are integer multiples of some delay value, i.e., commensurate delays.
The parametrization is done by solving a {\em quadratic eigenvalue problem}
which is constructed from the vectorization of a matrix equation and hence
typically of large size. For commensurate delay differential equations, the
corresponding equation is a polynomial eigenvalue problem. As a special case of
the proposed method, we find a closed form for a parameterization of the
critical surface for the scalar case.
We provide several examples with visualizations where the computation is done
with some exploitation of the structure of eigenvalue problems.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 08:50:03 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Jarlebring",
"Elias",
""
]
] |
0706.1635 | Yutaka Baba | Yutaka Baba, Nobuyuki Ishibashi, Koichi Murakami | D-brane States and Disk Amplitudes in OSp Invariant Closed String Field
Theory | 37 pages, 8 figures | JHEP 0710:008,2007 | 10.1088/1126-6708/2007/10/008 | UTHEP-546, KEK-TH-1157 | hep-th | null | We construct solitonic states in the OSp invariant string field theory, which
are BRST invariant in the leading order of regularization parameter $\epsilon$.
We calculate the disk amplitudes using these solitonic states and show that
they describe D-branes and ghost D-branes.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 08:50:42 GMT"
}
] | 2009-11-18T00:00:00 | [
[
"Baba",
"Yutaka",
""
],
[
"Ishibashi",
"Nobuyuki",
""
],
[
"Murakami",
"Koichi",
""
]
] |
0706.1636 | Gloria Luz\'on | G. Luz\'on, B. Beltr\'an, J. M. Carmona, S. Cebri\'an, H. G\'omez, I.
G. Irastorza, J. Morales, A. Ort\'iz, A. Rodr\'iguez, J. Ruz, J. A. Villar | Background studies and shielding effects for the TPC detector of the
CAST experiment | 14 pages, 5 figures, accepted in New Journal of Physics | New J.Phys.9:208,2007 | 10.1088/1367-2630/9/7/208 | null | astro-ph | null | Sunset solar axions traversing the intense magnetic field of the CERN Axion
Solar Telescope (CAST) experiment may be detected in a Time Projection Chamber
(TPC) detector, as X-rays signals. These signals could be masked, however, by
the inhomogeneous background of materials in the experimental site. A detailed
analysis, based on the detector characteristics, the background radiation at
the CAST site, simulations and experimental results, has allowed us to design a
shielding which reduces the background level by a factor of ~4 compared to the
detector without shielding, depending on its position, in the energy range
between 1 and 10 keV. Moreover, this shielding has improved the homogeneity of
background measured by the TPC.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 08:54:30 GMT"
}
] | 2009-06-23T00:00:00 | [
[
"Luzón",
"G.",
""
],
[
"Beltrán",
"B.",
""
],
[
"Carmona",
"J. M.",
""
],
[
"Cebrián",
"S.",
""
],
[
"Gómez",
"H.",
""
],
[
"Irastorza",
"I. G.",
""
],
[
"Morales",
"J.",
""
],
[
"Ortíz",
"A.",
""
],
[
"Rodríguez",
"A.",
""
],
[
"Ruz",
"J.",
""
],
[
"Villar",
"J. A.",
""
]
] |
0706.1637 | Ronen Gradwohl | Ronen Gradwohl, Amir Yehudayoff | t-Wise Independence with Local Dependencies | 5 pages | null | null | null | math.PR math.ST stat.TH | null | In this note we prove a large deviation bound on the sum of random variables
with the following dependency structure: there is a dependency graph $G$ with a
bounded chromatic number, in which each vertex represents a random variable.
Variables that are represented by neighboring vertices may be arbitrarily
dependent, but collections of variables that form an independent set in $G$ are
$t$-wise independent.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 15:06:12 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Gradwohl",
"Ronen",
""
],
[
"Yehudayoff",
"Amir",
""
]
] |
0706.1638 | Benoit Crouzy | B. Crouzy, S. Tollis, D. A. Ivanov | Josephson current in a superconductor -- ferromagnet -- superconductor
junction with in-plane ferromagnetic domains | 9 pages, 6 figures | Phys. Rev. B 76, 134502 (2007) | 10.1103/PhysRevB.76.134502 | null | cond-mat.mes-hall cond-mat.supr-con | null | We study a diffusive superconductor--ferromagnet--superconductor (SFS)
junction with in-plane ferromagnetic domains. Close to the superconducting
transition temperature, we describe the proximity effect in the junction with
the linearized Usadel equations. We find that properties of such a junction
depend on the size of the domains relative to the magnetic coherence length. In
the case of large domains, the junction exhibits transitions to the $\pi$
state, similarly to a single-domain SFS junction. In the case of small domains,
the magnetization effectively averages out, and the junction is always in the
zero state, similarly to a superconductor--normal metal--superconductor (SNS)
junction. In both those regimes, the influence of domain walls may be
approximately described as an effective spin-flip scattering. We also study the
inhomogeneous distribution of the local current density in the junction. Close
to the 0--$\pi$ transitions, the directions of the critical current may be
opposite in the vicinity of the domain wall and in the middle of the domains.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 09:29:23 GMT"
}
] | 2007-10-02T00:00:00 | [
[
"Crouzy",
"B.",
""
],
[
"Tollis",
"S.",
""
],
[
"Ivanov",
"D. A.",
""
]
] |
0706.1639 | Guillermo Quintana-Lacaci | G. Quintana-Lacaci, V. Bujarrabal, A. Castro-Carrizo and J. Alcolea | The chemical composition of the circumstellar envelopes around yellow
hypergiant stars | 14 pages, 12 figures | null | 10.1051/0004-6361:20077244 | null | astro-ph | null | The yellow hypergiant stars (YHGs) are extremely luminous and massive objects
whose general properties are poorly known. Only two of this kind of star show
massive circumstellar envelopes, IRC+10420 and AFGL2343. We aim to study the
chemistry of the circumstellar envelopes around these two sources, by
comparison with well known AGB stars and protoplanetary nebulae. We also
estimate the abundances of the observed molecular species. We have performed
single-dish observations of different transitions for twelve molecular species.
We have compared the ratio of the intensities of the molecular transitions and
of the estimated abundances in AFGL2343 and IRC+10420 with those in O-rich and
C-rich AGB stars and protoplanetary nebulae. Both YHGs, AFGL2343, and
IRC+10420, have been found to have an O-rich chemistry similar to that in
O-rich AGB stars, though for AFGL2343 the emission of most molecules compared
with 13CO lines is relatively weak. Clear differences with the other evolved
sources appear when we compare the line intensity corrected for distance and
the profile widths which are, respectively, very intense and very wide in YHGs.
The abundances obtained for IRC+10420 agree with those found in AGB stars, but
in general those found in AFGL2343, except for 13CO, are too low. This
apparently low molecular abundance in AFGL2343 could be due to the fact that
these molecules are present only in an inner region of the shell where the mass
is relatively low.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 12:55:44 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Quintana-Lacaci",
"G.",
""
],
[
"Bujarrabal",
"V.",
""
],
[
"Castro-Carrizo",
"A.",
""
],
[
"Alcolea",
"J.",
""
]
] |
0706.1640 | Frank Fiedler | Frank Fiedler (LMU Munich) | Independent measurement of the top quark mass and the light- and
bottom-jet energy scales at hadron colliders | 10 pages, 5 figures | Eur.Phys.J.C53:41-48,2008 | 10.1140/epjc/s10052-007-0461-x | null | hep-ex | null | A method for the simultaneous determination of the energy scales for b-quark
jets and light jets, the jet energy resolution, and the top quark mass at
hadron colliders is presented. The method exploits the unique kinematics of
events with top-antitop pair production, where one of the top quarks involves a
leptonic and one a hadronic W boson decay. The paper shows a feasibility study
of how this simultaneous measurement can be performed at the upcoming LHC
experiments ATLAS and CMS.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 09:28:40 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Fiedler",
"Frank",
"",
"LMU Munich"
]
] |
0706.1641 | Metin Sabuncu | Metin Sabuncu, Ladislav Mi\v{s}ta, Jr., Jarom\'ir Fiur\'a\v{s}ek,
Radim Filip, Gerd Leuchs, Ulrik L. Andersen | Non-unity gain minimal disturbance measurement | 12 pages | null | 10.1103/PhysRevA.76.032309 | null | quant-ph | null | We propose and experimentally demonstrate an optimal non-unity gain Gaussian
scheme for partial measurement of an unknown coherent state that causes minimal
disturbance of the state. The information gain and the state disturbance are
quantified by the noise added to the measurement outcomes and to the output
state, respectively. We derive the optimal trade-off relation between the two
noises and we show that the trade-off is saturated by non-unity gain
teleportation. Optimal partial measurement is demonstrated experimentally using
a linear optics scheme with feed-forward.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 09:31:18 GMT"
}
] | 2016-08-14T00:00:00 | [
[
"Sabuncu",
"Metin",
""
],
[
"Mišta,",
"Ladislav",
"Jr."
],
[
"Fiurášek",
"Jaromír",
""
],
[
"Filip",
"Radim",
""
],
[
"Leuchs",
"Gerd",
""
],
[
"Andersen",
"Ulrik L.",
""
]
] |
0706.1642 | Vlady Ravelomanana | Anne-Elisabeth Baert (LaRIA), Vlady Ravelomanana (LIPN), Lo\"ys
Thimonier (LaRIA) | On the growth of components with non fixed excesses | A small note on the evolution of giant components | Discrete Applied Mathematics 130, 3 (17/07/2003) 487--493 | 10.1016/S0166-218X(03)00326-3 | null | cs.DM math.CO | null | Denote by an $l$-component a connected graph with $l$ edges more than
vertices. We prove that the expected number of creations of $(l+1)$-component,
by means of adding a new edge to an $l$-component in a randomly growing graph
with $n$ vertices, tends to 1 as $l,n$ tends to $\infty$ but with $l =
o(n^{1/4})$. We also show, under the same conditions on $l$ and $n$, that the
expected number of vertices that ever belong to an $l$-component is $\sim
(12l)^{1/3} n^{2/3}$.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 09:32:34 GMT"
}
] | 2007-06-14T00:00:00 | [
[
"Baert",
"Anne-Elisabeth",
"",
"LaRIA"
],
[
"Ravelomanana",
"Vlady",
"",
"LIPN"
],
[
"Thimonier",
"Loÿs",
"",
"LaRIA"
]
] |
0706.1643 | Carolin Hieret | C. Hieret, S. Leurini, K. M. Menten, P. Schilke, S. Thorwirth, F.
Wyrowski | APEX survey of southern high mass star forming regions | 3 pages, 3 figures; to appear in "Science with ALMA: a new era for
Astrophysics" Conference Proceedings | null | null | null | astro-ph | null | A systematic study of a large sample of sources, covering a wide range in
galactocentric distances, masses and luminosities, is a fast and efficient way
of obtaining a good overview of the different stages of high-mass star
formation. With these goals in mind, we have started a survey of 40 color
selected IRAS sources south of -20 degrees declination with the APEX telescope
on Chajnantor, Chile. Our first APEX results already demonstrate that the
selection criteria were successful, since some of the sources are very rich in
molecular lines.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 09:37:27 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Hieret",
"C.",
""
],
[
"Leurini",
"S.",
""
],
[
"Menten",
"K. M.",
""
],
[
"Schilke",
"P.",
""
],
[
"Thorwirth",
"S.",
""
],
[
"Wyrowski",
"F.",
""
]
] |
0706.1644 | Ion I. Cot{\ba}escu | Ion I. Cotaescu | Pseudo-Gaussian quantum models | 7 pages, 1 figure | null | null | null | math-ph math.MP quant-ph | null | A new family of one-dimensional quantum models is proposed in terms of new
potentials with a Gaussian asymptotic behavior but approaching to the potential
of the harmonic o scillator when $x\to 0$. It is shown that, in the energy
basis of the harmonic oscillator, the matrix elements of the Hamiltonian
operators of these new models can be derived from generating functionals.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 09:38:11 GMT"
}
] | 2014-10-07T00:00:00 | [
[
"Cotaescu",
"Ion I.",
""
]
] |
0706.1645 | Tonguc Rador | Tonguc Rador and Muhittin Mungan | Dynamics of Three Agent Games | null | J. Phys. A: Math. Theor. 41 055002, 2008. | 10.1088/1751-8113/41/5/055002 | null | physics.soc-ph cond-mat.stat-mech | null | We study the dynamics and resulting score distribution of three-agent games
where after each competition a single agent wins and scores a point. A single
competition is described by a triplet of numbers $p$, $t$ and $q$ denoting the
probabilities that the team with the highest, middle or lowest accumulated
score wins. We study the full family of solutions in the regime, where the
number of agents and competitions is large, which can be regarded as a
hydrodynamic limit. Depending on the parameter values $(p,q,t)$, we find six
qualitatively different asymptotic score distributions and we also provide a
qualitative understanding of these results. We checked our analytical results
against numerical simulations of the microscopic model and find these to be in
excellent agreement. The three agent game can be regarded as a social model
where a player can be favored or disfavored for advancement, based on his/her
accumulated score. It is also possible to decide the outcome of a three agent
game through a mini tournament of two-a gent competitions among the
participating players and it turns out that the resulting possible score
distributions are a subset of those obtained for the general three agent-games.
We discuss how one can add a steady and democratic decline rate to the model
and present a simple geometric construction that allows one to write down the
corresponding score evolution equations for $n$-agent games.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 09:42:03 GMT"
}
] | 2015-05-13T00:00:00 | [
[
"Rador",
"Tonguc",
""
],
[
"Mungan",
"Muhittin",
""
]
] |
0706.1646 | Urban Eriksson | Urban Eriksson and Lennart Lindegren | Limits of ultra-high-precision optical astrometry: Stellar surface
structures | 12 pages, 4 figures, submitted to A&A | null | 10.1051/0004-6361:20078031 | null | astro-ph | null | We investigate the astrometric effects of stellar surface structures as a
practical limitation to ultra-high-precision astrometry, e.g. in the context of
exoplanet searches, and to quantify the expected effects in different regions
of the HR-diagram. Stellar surface structures are likely to produce
fluctuations in the integrated flux and radial velocity of the star, as well as
a variation of the observed photocentre, i.e. astrometric jitter, and closure
phase. We use theoretical considerations supported by Monte Carlo simulations
to derive statistical relations between the corresponding astrometric,
photometric, and radial-velocity effects. For most stellar types the
astrometric jitter due to stellar surface structures is expected to be of order
10 micro-AU or greater. This is more than the astrometric displacement
typically caused by an Earth-size exoplanet in the habitable zone, which is
about 1-4 micro-AU for long-lived main-sequence stars. Only for stars with
extremely low photometric variability (<0.5 mmag) and low magnetic activity,
comparable to that of the Sun, will the astrometric jitter be of order 1
micro-AU, suffcient to allow the astrometric detection of an Earth-sized planet
in the habitable zone. While stellar surface structure may thus seriously
impair the astrometric detection of small exoplanets, it has in general
negligible impact on the detection of large (Jupiter-size) planets and on the
determination of stellar parallax and proper motion. From the starspot model we
also conclude that the commonly used spot filling factor is not the most
relevant parameter for quantifying the spottiness in terms of the resulting
astrometric, photometric and radial-velocity variations.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 09:49:22 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Eriksson",
"Urban",
""
],
[
"Lindegren",
"Lennart",
""
]
] |
0706.1647 | Shingo Takeuchi | Masanori Hanada (Kyoto U., RIKEN), Jun Nishimura (KEK, SOKENDAI),
Shingo Takeuchi (SOKENDAI) | Non-lattice simulation for supersymmetric gauge theories in one
dimension | REVTeX4, 4 pages, 3 figures | Phys.Rev.Lett.99:161602,2007 | 10.1103/PhysRevLett.99.161602 | RIKEN-TH-104, KEK-TH-1158 | hep-lat hep-th | null | Lattice simulation of supersymmetric gauge theories is not straightforward.
In some cases the lack of manifest supersymmetry just necessitates cumbersome
fine-tuning, but in the worse cases the chiral and/or Majorana nature of
fermions makes it difficult to even formulate an appropriate lattice theory. We
propose to circumvent all these problems inherent in the lattice approach by
adopting a non-lattice approach in the case of one-dimensional supersymmetric
gauge theories, which are important in the string/M theory context.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 09:50:03 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Hanada",
"Masanori",
"",
"Kyoto U., RIKEN"
],
[
"Nishimura",
"Jun",
"",
"KEK, SOKENDAI"
],
[
"Takeuchi",
"Shingo",
"",
"SOKENDAI"
]
] |
0706.1648 | Alain Pautrat | A.Pautrat, C. Simon, Ch. Goupil, P. Mathieu, A. Brulet, C. Dewhurst
and A.I. Rykov | Persistence of characteristics of an ordered flux line lattice above the
second peak in $Bi_2Sr_2CaCu_2O_{8+ \delta}$ | accepted for publication in Phys Rev B | null | 10.1103/PhysRevB.75.224512 | null | cond-mat.supr-con | null | We report Small Angle Neutron Scattering measurements of the flux lines
lattice (FLL) in $Bi_2Sr_2CaCu_2O_{8+ \delta}$. As previously reported, the
scattered intensity decreases strongly when the magnetic field is increased,
but it remains measurable far above the second peak. The direct observation of
Bragg peaks proves that the characteristics of a lattice are still present. No
structural features related to a symmetry breaking, such as a liquid like or an
amorphous state, can be observed. However, the associated scattered intensity
is very low and is difficult to explain. We discuss the coexistence between two
FLL states as a possible interpretation.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 09:56:07 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Pautrat",
"A.",
""
],
[
"Simon",
"C.",
""
],
[
"Goupil",
"Ch.",
""
],
[
"Mathieu",
"P.",
""
],
[
"Brulet",
"A.",
""
],
[
"Dewhurst",
"C.",
""
],
[
"Rykov",
"A. I.",
""
]
] |
0706.1649 | Mirian Tsulaia Dr | Alon E. Faraggi, Mirian Tsulaia | On the Low Energy Spectra of the Nonsupersymmetric Heterotic String
Theories | 10 pages | Eur.Phys.J.C54:495-500,2008 | 10.1140/epjc/s10052-008-0545-2 | LTH-746 | hep-th hep-ph | null | The ten dimensional string theories as well as eleven dimensional
supergravity are conjectured to arise as limits of a more basic theory,
traditionaly dubbed M--theory. This notion is confined to the ten dimensional
supersymmetric theories. String theory, however, also contains ten dimensional
nonsupersymmetric theories that have not been incorporated into this picture.
In this note we explore the possibility of generating the low energy spectra of
various nonsupersymmetric heterotic string vacua form the Horava--Witten model.
We argue that this can be achieved by imposing on the Horava--Witten model an
invariance with respect to some extra operators which identify the orbifold
fixed planes in a nontrivial way, and demonstrate it for the E_8 and
SO(16)XSO(16) heterotic string vacua in ten dimensions.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 12:28:14 GMT"
},
{
"version": "v2",
"created": "Tue, 19 Jun 2007 14:46:58 GMT"
},
{
"version": "v3",
"created": "Fri, 25 Jan 2008 16:17:23 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Faraggi",
"Alon E.",
""
],
[
"Tsulaia",
"Mirian",
""
]
] |
0706.1650 | Stefan Fredenhagen | Stefan Fredenhagen, David Wellig | A common limit of super Liouville theory and minimal models | 26 pages, references added | JHEP 0709:098,2007 | 10.1088/1126-6708/2007/09/098 | AEI-2007-039 | hep-th | null | We show that N=1 supersymmetric Liouville theory can be continued to central
charge c=3/2, and that the limiting non-rational superconformal field theory
can also be obtained as a limit of supersymmetric minimal models. This
generalises a result known for the non-supersymmetric case. We present explicit
expressions for the three-point functions of bulk fields, as well as a set of
superconformal boundary states. The main technical ingredient to take the limit
of minimal models consists in determining analytic expressions for the
structure constants. In the appendix we show in detail how the structure
constants of supersymmetric and Virasoro minimal models can be rewritten in
terms of Barnes' double gamma functions.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 10:55:51 GMT"
},
{
"version": "v2",
"created": "Wed, 12 Sep 2007 07:46:03 GMT"
}
] | 2009-11-18T00:00:00 | [
[
"Fredenhagen",
"Stefan",
""
],
[
"Wellig",
"David",
""
]
] |
0706.1651 | Maxim Samsonov | S. M. Khoroshkin, I. I. Pop, M. E. Samsonov, A. A. Stolin, V. N.
Tolstoy | On Some Lie Bialgebra Structures on Polynomial Algebras and their
Quantization | 41 pages, LATEX | null | 10.1007/s00220-008-0554-x | null | math.QA math-ph math.MP | null | We study classical twists of Lie bialgebra structures on the polynomial
current algebra $\mathfrak{g}[u]$, where $\mathfrak{g}$ is a simple complex
finite-dimensional Lie algebra. We focus on the structures induced by the
so-called quasi-trigonometric solutions of the classical Yang-Baxter equation.
It turns out that quasi-trigonometric $r$-matrices fall into classes labelled
by the vertices of the extended Dynkin diagram of $\mathfrak{g}$. We give
complete classification of quasi-trigonometric $r$-matrices belonging to
multiplicity free simple roots (which have coefficient 1 in the decomposition
of the maximal root). We quantize solutions corresponding to the first root of
$\mathfrak{sl}(n)$.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 10:34:19 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Khoroshkin",
"S. M.",
""
],
[
"Pop",
"I. I.",
""
],
[
"Samsonov",
"M. E.",
""
],
[
"Stolin",
"A. A.",
""
],
[
"Tolstoy",
"V. N.",
""
]
] |
0706.1652 | Victor Katsnelson | Victor Katsnelson | Right and Left Joint System Representation of a Rational Matrix Function
in General Position (System Representation Theory for Dummies) | null | Operator Theory: Advances and Applications, Vol. 123, 2001,
Birkhauser | null | null | math.CA | null | For a rational matrix function R of one variable in general position, the
matrix functions R(x)/R(y) and R(y)\R(x) of two variables are considered. For
these matrix functions of two variables, representations which are analogous to
the system representations (or realizations) of a rational matrix function of
one variable are constructed. This representation is called the joint right
[the joint left] system representation.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 10:25:20 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Katsnelson",
"Victor",
""
]
] |
0706.1653 | Agata Fronczak | Agata Fronczak, Piotr Fronczak and Janusz A. Holyst | Thermodynamic forces, flows, and Onsager coefficients in complex
networks | 4 pages, 2 figures | Phys. Rev. E 76, 061106 (2007) | 10.1103/PhysRevE.76.061106 | null | cond-mat.dis-nn cond-mat.stat-mech | null | We present Onsager formalism applied to random networks with arbitrary degree
distribution. Using the well-known methods of non-equilibrium thermodynamics we
identify thermodynamic forces and their conjugated flows induced in networks as
a result of single node degree perturbation. The forces and the flows can be
understood as a response of the system to events, such as random removal of
nodes or intentional attacks on them. Finally, we show that cross effects (such
as thermodiffusion, or thermoelectric phenomena), in which one force may not
only give rise to its own corresponding flow, but to many other flows, can be
observed also in complex networks.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 10:32:21 GMT"
}
] | 2015-05-13T00:00:00 | [
[
"Fronczak",
"Agata",
""
],
[
"Fronczak",
"Piotr",
""
],
[
"Holyst",
"Janusz A.",
""
]
] |
0706.1654 | T. Padmanabhan | T. Padmanabhan | Gravity as an emergent phenomenon: A conceptual description | 11 p; AIP stylefiles included; Summary of several plenary talks in
the conferences including XXIII Texas Symposium in Relativistic Astrophysics
(Melbourne, Dec, 06); IAGRG Meeting (Delhi, Feb, 07); International workshop
on theoretical high energy physics (Roorkee, Mar, 2007); to appear in the
proceedings of IWTHEP | AIPConf.Proc.939:114-123,2007 | 10.1063/1.2803795 | null | gr-qc astro-ph hep-th | null | I describe several broad features of a programme to understand gravity as an
emergent, long wavelength, phenomenon (like elasticity) and discuss one
concrete framework for realizing this paradigm in the backdrop of several
recent results.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 10:32:33 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Padmanabhan",
"T.",
""
]
] |
0706.1655 | Paul Purdon Martin | P P Martin | Pascal's triangle and word bases for blob algebra ideals | null | null | null | null | math.RT | null | We give an elementary proof of isomorphism of the blob (diagram) algebra and
the corresponding extended Temperley-Lieb algebra (defined by presentation).
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 10:33:00 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Martin",
"P P",
""
]
] |
0706.1656 | Bernadetta Devecchi | B. Devecchi, M. Colpi, M. Mapelli, A. Possenti | Millisecond pulsars around intermediate-mass black holes in globular
clusters | 14 pages, 11 figures, 4 tables, to be published in MNRAS | null | 10.1111/j.1365-2966.2007.12160.x | null | astro-ph | null | We study the process of dynamical capture of a millisecond pulsar (MSP) by a
single or binary IMBH, simulating various types of single-binary and
binary-binary encounters. It is found that [IMBH,MSP] binaries form over cosmic
time in a cluster, via encounters of wide--orbit binary MSPs off the single
IMBH, and at a lower pace, via interactions of (binary or single) MSPs with the
IMBH orbited by a typical cluster star. The formation of an [IMBH,MSP] system
is strongly inhibited if the IMBH is orbited by a stellar mass black hole. The
[IMBH,MSP] binaries that form are relatively short-lived, $\lsim 10^{8-9}$ yr,
since their orbits decay via emission of gravitational waves. The detection of
an [IMBH,MSP] system has a low probability of occurrence, when inferred from
the current sample of MSPs in GCs. If next generation radio telescopes, like
SKA, will detect an order of magnitude larger population of MSP in GCs, at
least one [IMBH,MSP] is expected. Therefore, a complete search for
low-luminosity MSPs in the GCs of the Milky Way with SKA will have the
potential of testing the hypothesis that IMBHs of order $100 \msun$ are
commonly hosted in GCs.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 10:33:44 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Devecchi",
"B.",
""
],
[
"Colpi",
"M.",
""
],
[
"Mapelli",
"M.",
""
],
[
"Possenti",
"A.",
""
]
] |
0706.1657 | Patrick Charbonneau | P. Charbonneau and D. R. Reichman | Dynamical Heterogeneity and Nonlinear Susceptibility in Short-Ranged
Attractive Supercooled Liquids | 5 pages, 3 figures | Phys. Rev. Lett. 99, 135701 (2007) | 10.1103/PhysRevLett.99.135701 | null | cond-mat.stat-mech | null | Recent work has demonstrated the strong qualitative differences between the
dynamics near a glass transition driven by short-ranged repulsion and one
governed by short-ranged attraction. Here, we study in detail the behavior of
non-linear, higher-order correlation functions that measure the growth of
length scales associated with dynamical heterogeneity in both types of systems.
We find that this measure is qualitatively different in the repulsive and
attractive cases with regards to the wave vector dependence as well as the time
dependence of the standard non-linear four-point dynamical susceptibility. We
discuss the implications of these results for the general understanding of
dynamical heterogeneity in glass-forming liquids.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 10:36:11 GMT"
}
] | 2010-04-16T00:00:00 | [
[
"Charbonneau",
"P.",
""
],
[
"Reichman",
"D. R.",
""
]
] |
0706.1658 | Oscar Blanch Bigas | O. Blanch Bigas (for the Pierre Auger Collaboration) | Limits to the diffuse flux of UHE tau neutrinos at EeV energies from the
Pierre Auger Observatory | To be published in Proceedings of the 30th International Cosmic Ray
Conference, July 3 - 11, 2007, Merida, Yucatan, Mexico. 4 pages, 5 figures | null | null | null | astro-ph | null | With the Pierre Auger Observatory we have the capability of detecting
ultra-high energy neutrinos by searching for very inclined showers with a
significant electromagnetic component. In this work we discuss the
discrimination power of the instrument for earth skimming tau neutrinos with
ultra-high energies. Based on the data collected since January 2004 an upper
limit to the diffuse flux of neutrinos atEeV energies is presented and
systematic uncertainties are discussed.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 10:36:12 GMT"
}
] | 2019-08-13T00:00:00 | [
[
"Bigas",
"O. Blanch",
"",
"for the Pierre Auger Collaboration"
]
] |
0706.1659 | Cesar R. de Oliveira | Tulio O. Carvalho, Cesar R. de Oliveira | Hybrid Quasicrystals, Transport and Localization in Products of Minimal
Sets | 3 figures. To appear in Journal of Stat. Physics | null | 10.1007/s10955-007-9299-8 | null | math-ph math.MP | null | We consider convex combinations of finite-valued almost periodic sequences
(mainly substitution sequences) and put them as potentials of one-dimensional
tight-binding models. We prove that these sequences are almost periodic. We
call such combinations {\em hybrid quasicrystals} and these studies are related
to the minimality, under the shift on both coordinates, of the product space of
the respective (minimal) hulls. We observe a rich variety of behaviors on the
quantum dynamical transport ranging from localization to transport.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 10:39:40 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Carvalho",
"Tulio O.",
""
],
[
"de Oliveira",
"Cesar R.",
""
]
] |
0706.1660 | Kristian D. Kennaway | Kristian D. Kennaway | Brane Tilings | 63 pages, 22 figures, invited review submitted to IJMPA | Int.J.Mod.Phys.A22:2977-3038,2007 | 10.1142/S0217751X07036877 | null | hep-th | null | We review and extend the progress made over the past few years in
understanding the structure of toric quiver gauge theories; those which are
induced on the world-volume of a stack of D3-branes placed at the tip of a
toric Calabi-Yau cone, at an ``orbifold point'' in Kaehler moduli space. These
provide an infinite class of four-dimensional N=1 superconformal field theories
which may be studied in the context of the AdS/CFT correspondence. It is now
understood that these gauge theories are completely specified by certain
two-dimensional torus graphs, called brane tilings, and the combinatorics of
the dimer models on these graphs. In particular, knowledge of the dual
Sasaki-Einstein metric is not required to determine the gauge theory, only
topological and symplectic properties of the toric Calabi-Yau cone. By
analyzing the symmetries of the toric quiver theories we derive the dimer
models and use them to construct the moduli space of the theory both
classically and semiclassically. Using mirror symmetry the brane tilings are
shown to arise in string theory on the world-volumes of the fractional
D6-branes that are mirror to the stack of D3-branes at the tip of the cone.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 10:57:39 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Kennaway",
"Kristian D.",
""
]
] |
0706.1661 | John H. Field | J. H. Field | Quantum electrodynamics and experiment demonstrate the non-retarded
nature of electrodynamical force fields | 10 pages, 2 figures. V2 important typo removed. V3 another important
typo removed | Physics of Particles and Nuclei Letters, 2009, Vol. 6, No. 4, pp.
320-324 | null | null | physics.class-ph | null | In quantum electrodynamics, the quantitatively most successful theory in the
history of science, intercharge forces obeying the inverse square law are due
to the exchange of space-like virtual photons. The fundamental quantum process
underlying applications as diverse as the gyromagnetic ratio of the electron
and electrical machinery is then M{\o}ller scattering $ee \to ee$. Analysis of
the quantum amplitude for this process shows that the corresponding intercharge
force acts instantaneously. This prediction has been verified in a recent
experiment.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 10:45:47 GMT"
},
{
"version": "v2",
"created": "Mon, 2 Jul 2007 11:13:39 GMT"
},
{
"version": "v3",
"created": "Tue, 17 Jul 2007 10:39:13 GMT"
}
] | 2009-07-13T00:00:00 | [
[
"Field",
"J. H.",
""
]
] |
0706.1662 | Subray Bhat | S.S.Rao and S.V.Bhat | Temperature dependence of magnetic anisotropy in bulk and nanoparticles
of Pr_0.5Sr_0.5MnO_3 | 14 pages including 5 figures;submitted to Applied Physics Letters | null | null | null | cond-mat.str-el cond-mat.mtrl-sci | null | Nanoparticles (size 20, 40 and 60 nm) of Pr_0.5Sr_0.5MnO_3 are prepared by
sol-gel technique and their magnetic properties are studied using ferromagnetic
resonance and magnetization measurements. A comparison with the properties of
the bulk material shows that the ferromagnetic transition at 265 K remains
unaffected but the anti-ferromagnetic transition at T_N = 150 K disappears in
the nanoparticles. Further, the temperature dependence of magnetic anisotropy
shows a complex behavior, being higher in the nanoparticles at high
temperatures and lower at lower temperatures in comparison with the bulk.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 13:47:50 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Rao",
"S. S.",
""
],
[
"Bhat",
"S. V.",
""
]
] |
0706.1663 | Lukas Hollenstein | Christian G. Boehmer, Lukas Hollenstein, Francisco S. N. Lobo | Stability of the Einstein static universe in f(R) gravity | 7 pages, 2 figures, 2 tables; references added | Phys.Rev. D76 (2007) 084005 | 10.1103/PhysRevD.76.084005 | null | gr-qc astro-ph hep-th | null | We analyze the stability of the Einstein static universe by considering
homogeneous scalar perturbations in the context of f(R) modified theories of
gravity. By considering specific forms of f(R), the stability regions of the
solutions are parameterized by a linear equation of state parameter w=p/rho.
Contrary to classical general relativity, it is found that in f(R) gravity a
stable Einstein cosmos with a positive cosmological constant does indeed exist.
Thus, we are lead to conclude that, in principle, modifications in f(R) gravity
stabilize solutions which are unstable in general relativity.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 11:30:49 GMT"
},
{
"version": "v2",
"created": "Mon, 18 Jun 2007 09:59:42 GMT"
}
] | 2012-06-22T00:00:00 | [
[
"Boehmer",
"Christian G.",
""
],
[
"Hollenstein",
"Lukas",
""
],
[
"Lobo",
"Francisco S. N.",
""
]
] |
0706.1664 | Joao Yun | Joao L. Yun, Ana Lopez-Sepulcre, and Jose M. Torrelles | A new young stellar cluster embedded in a molecular cloud in the far
outer Galaxy | 6 pages, 6 figures | null | 10.1051/0004-6361:20077570 | null | astro-ph | null | We report the discovery of a new young stellar cluster and molecular cloud
located in the far outer Galaxy, seen towards IRAS 06361-0142, and we
characterise their properties. Near-infrared images were obtained with
VLT/ISAAC through JHKs filters, millimetre line observations of CO(1-0) were
obtained with SEST, and VLA 6 cm continuum maps obtained from archive data. The
cloud and cluster are located at a distance of 7 kpc and a Galactocentric
distance of 15 kpc, well in the far outer Galaxy. Morphologically, IRAS
06361-0142 appears as a cluster of several tens of stars surrounded by a nearly
spherical nebular cavity centred at the position of the IRAS source. The
cluster appears composed of low and intermediate-mass, young reddened stars
with a large fraction having cleared the inner regions of their circumstellar
discs responsible for (H - Ks) colour excess. The observations are compatible
with a 4 Myr cluster with variable spatial extinction between Av = 6 and Av =
13.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 11:46:45 GMT"
}
] | 2019-08-19T00:00:00 | [
[
"Yun",
"Joao L.",
""
],
[
"Lopez-Sepulcre",
"Ana",
""
],
[
"Torrelles",
"Jose M.",
""
]
] |
0706.1665 | Vlady Ravelomanana | Vlady Ravelomanana (LIPN) | Another Proof of Wright's Inequalities | null | null | null | null | cs.DM math.CO | null | We present a short way of proving the inequalities obtained by Wright in
[Journal of Graph Theory, 4: 393 - 407 (1980)] concerning the number of
connected graphs with $\ell$ edges more than vertices.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 11:42:56 GMT"
}
] | 2007-06-14T00:00:00 | [
[
"Ravelomanana",
"Vlady",
"",
"LIPN"
]
] |
0706.1666 | Andre Utermann | Daniel Boer, Andre Utermann, Erik Wessels | x-Evolution of Phenomenological Dipole Cross Sections | 4 pages, 2 figures, contributed to the Proceedings of DIS2007 | null | null | null | hep-ph | null | Deep inelastic scattering at small x can be described very effectively using
saturation inspired dipole models. We investigate whether such models are
compatible with the numerical solutions of the Balitsky-Kovchegov (BK) equation
which is expected to describe the nonlinear evolution in x of the dipole cross
section. We find that the BK equation yields results that are qualitatively
different from those of phenomenological studies. Geometric scaling is
recovered only towards asymptotic rapidities. In this limit the value of the
anomalous dimension gamma(r,x) at the saturation scale approaches approximately
0.44, in contrast to the value 0.63 commonly used in the models.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 11:44:31 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Boer",
"Daniel",
""
],
[
"Utermann",
"Andre",
""
],
[
"Wessels",
"Erik",
""
]
] |
0706.1667 | Alessio Marrani | S. Ferrara, A. Marrani | On the Moduli Space of non-BPS Attractors for N=2 Symmetric Manifolds | 1+11 pages, 4 Tables | Phys.Lett.B652:111-117,2007 | 10.1016/j.physletb.2007.07.001 | CERN-PH-TH/2007-094; UCLA/07/TEP/15 | hep-th | null | We study the ``flat'' directions of non-BPS extremal black hole attractors
for N=2, d=4 supergravities whose vector multiplets' scalar manifold is endowed
with homogeneous symmetric special Kahler geometry. The non-BPS attractors with
non-vanishing central charge have a moduli space described by real special
geometry (and thus related to the d=5 parent theory), whereas the moduli spaces
of non-BPS attractors with vanishing central charge are certain Kahler
homogeneous symmetric manifolds. The moduli spaces of the non-BPS attractors of
the corresponding N=2, d=5 theories are also indicated, and shown to be rank-1
homogeneous symmetric manifolds.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 12:07:16 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Ferrara",
"S.",
""
],
[
"Marrani",
"A.",
""
]
] |
0706.1668 | Thomas Prellberg | J. Krawczyk, A. L. Owczarek, T. Prellberg, A. Rechnitzer | Controlling Secondary Structures of Bio-Polymers with Hydrogen-Like
Bonding | null | null | null | null | cond-mat.soft cond-mat.stat-mech | null | We present results for a lattice model of bio-polymers where the type of
$\beta$-sheet formation can be controlled by different types of hydrogen bonds
depending on the relative orientation of close segments of the polymer. Tuning
these different interaction strengths leads to low-temperature structures with
different types of orientational order. We perform simulations of this model
and so present the phase diagram, ascertaining the nature of the phases and the
order of the transitions between these phases.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 11:54:03 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Krawczyk",
"J.",
""
],
[
"Owczarek",
"A. L.",
""
],
[
"Prellberg",
"T.",
""
],
[
"Rechnitzer",
"A.",
""
]
] |
0706.1669 | Matthew Coleman | Matthew G. Coleman, Jelte T. A. De Jong, Nicolas F. Martin,
Hans-Walter Rix, David J. Sand, Eric F. Bell, Richard W. Pogge, David J.
Thompson, H. Hippelein, E. Giallongo, R. Ragazzoni, Andrea DiPaola, Jacopo
Farinato, Riccardo Smareglia, Vincenzo Testa, Jill Bechtold, John M. Hill,
Peter M. Garnavich, Richard F. Green | The Elongated Structure of the Hercules dSph from Deep LBT Imaging | Submitted to ApJ (Letters). 5 pages, 3 figures | null | null | null | astro-ph | null | We present a deep, wide-field photometric survey of the newly-discovered
Hercules dwarf spheroidal galaxy, based on data from the Large Binocular
Telescope. Images in B, V and r were obtained with the Large Binocular Camera
covering a 23' times 23' field of view to a magnitude of ~25.5 (5 sigma). This
permitted the construction of colour-magnitude diagrams that reach
approximately 1.5 magnitudes below the Hercules main sequence turnoff.
Three-filter photometry allowed us to preferentially select probable Hercules
member stars, and examine the structure of this system at a previously
unattained level. We find that the Hercules dwarf is highly elongated (3:1),
considerably more so than any other dSph satellite of the Milky Way except the
disrupting Sagittarius dwarf. While we cannot rule out that the unusual
structure is intrinsic to Hercules as an equilibrium system, our results
suggest tidal disruption as a likely cause of this highly elliptical structure.
Given the relatively large Galactocentric distance of this system (132 +/- 12
kpc), signs of tidal disruption would require the Hercules dwarf to be on a
highly eccentric orbit around the Milky Way.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 11:54:58 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Coleman",
"Matthew G.",
""
],
[
"De Jong",
"Jelte T. A.",
""
],
[
"Martin",
"Nicolas F.",
""
],
[
"Rix",
"Hans-Walter",
""
],
[
"Sand",
"David J.",
""
],
[
"Bell",
"Eric F.",
""
],
[
"Pogge",
"Richard W.",
""
],
[
"Thompson",
"David J.",
""
],
[
"Hippelein",
"H.",
""
],
[
"Giallongo",
"E.",
""
],
[
"Ragazzoni",
"R.",
""
],
[
"DiPaola",
"Andrea",
""
],
[
"Farinato",
"Jacopo",
""
],
[
"Smareglia",
"Riccardo",
""
],
[
"Testa",
"Vincenzo",
""
],
[
"Bechtold",
"Jill",
""
],
[
"Hill",
"John M.",
""
],
[
"Garnavich",
"Peter M.",
""
],
[
"Green",
"Richard F.",
""
]
] |
0706.1670 | Thierry Lahaye | Thierry Lahaye, Tobias Koch, Bernd Froehlich, Marco Fattori, Jonas
Metz, Axel Griesmaier, Stefano Giovanazzi and Tilman Pfau | Strong dipolar effects in a quantum ferrofluid | Final, published version | Nature 448, 672 (2007) | 10.1038/nature06036 | null | cond-mat.other | null | We report on the realization of a Chromium Bose-Einstein condensate (BEC)
with strong dipolar interaction. By using a Feshbach resonance, we reduce the
usual isotropic contact interaction, such that the anisotropic magnetic
dipole-dipole interaction between 52Cr atoms becomes comparable in strength.
This induces a change of the aspect ratio of the cloud, and, for strong dipolar
interaction, the inversion of ellipticity during expansion - the usual "smoking
gun" evidence for BEC - can even be suppressed. These effects are accounted for
by taking into account the dipolar interaction in the superfluid hydrodynamic
equations governing the dynamics of the gas, in the same way as classical
ferrofluids can be described by including dipolar terms in the classical
hydrodynamic equations. Our results are a first step in the exploration of the
unique properties of quantum ferrofluids.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 11:55:43 GMT"
},
{
"version": "v2",
"created": "Fri, 7 Mar 2008 17:36:13 GMT"
}
] | 2008-03-07T00:00:00 | [
[
"Lahaye",
"Thierry",
""
],
[
"Koch",
"Tobias",
""
],
[
"Froehlich",
"Bernd",
""
],
[
"Fattori",
"Marco",
""
],
[
"Metz",
"Jonas",
""
],
[
"Griesmaier",
"Axel",
""
],
[
"Giovanazzi",
"Stefano",
""
],
[
"Pfau",
"Tilman",
""
]
] |
0706.1671 | Hans-J\"urgen Sommers | Hans-J\"urgen Sommers | Symplectic Structure of the Real Ginibre Ensemble | Latex, 7 pages | null | null | null | cond-mat.stat-mech | null | We give a simple derivation of all $n$-point densities for the eigenvalues of
the real Ginibre ensemble with even dimension $N$ as quaternion determinants. A
very simple symplectic kernel governs both, the real and complex correlations.
1-and-2-point correlations are discussed in more detail. Scaling forms for
large dimension $N$ are derived.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 11:57:22 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Sommers",
"Hans-Jürgen",
""
]
] |
0706.1672 | Horacio Wio | Jorge A. Revelli, Miguel A. Rodriguez and Horacio S. Wio (IFCA, Spain) | Resonant phenomena in extended chaotic systems subject to external
noise: the Lorenz'96 model case | Submitted to Europhysics Letters (LaTex, 12 pgs, 5 figures) | null | 10.1016/j.physa.2008.01.110 | null | nlin.CD cond-mat.stat-mech physics.ao-ph | null | We investigate the effects of a time-correlated noise on an extended chaotic
system. The chosen model is the Lorenz'96, a kind of "toy" model used for
climate studies. Through the analysis of the system's time evolution and its
time and space correlations, we have obtained numerical evidence for two
stochastic resonance-like behavior. Such behavior is seen when both, the usual
and a generalized signal-to-noise ratio function are depicted as a function of
the external noise intensity or the system size. The underlying mechanism seems
to be associated to a "noise-induced chaos reduction". The possible relevance
of these and other findings for an "optimal" climate prediction are discussed.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 12:01:52 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Revelli",
"Jorge A.",
"",
"IFCA, Spain"
],
[
"Rodriguez",
"Miguel A.",
"",
"IFCA, Spain"
],
[
"Wio",
"Horacio S.",
"",
"IFCA, Spain"
]
] |
0706.1673 | Chengshi Liu | Cheng-shi Liu | Representations and classification of traveling wave solutions to
Sinh-G{\"o}rdon equation | 12 pages. accepted by Communications in theoretical physics (Beijing) | null | 10.1088/0253-6102/49/1/33 | null | nlin.SI nlin.PS | null | Two concepts named atom solution and combinatory solution are defined. The
classification of all single traveling wave atom solutions to Sinh-G{\"o}rdon
equation is obtained, and qualitative properties of solutions are discussed. In
particular, we point out that some qualitative properties derived intuitively
from dynamic system method aren't true. In final, we prove that our solutions
to Sinh-G{\"o}rdon equation include all solutions obtained in the paper[Fu Z T
et al, Commu. in Theor. Phys.(Beijing) 2006 45 55]. Through an example, we show
how to give some new identities on Jacobian elliptic functions.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 12:05:35 GMT"
}
] | 2015-05-13T00:00:00 | [
[
"Liu",
"Cheng-shi",
""
]
] |
0706.1674 | Roberto Passante | R. Messina and R. Passante | Fluctuations of the Casimir-Polder force between an atom and a
conducting wall | 6 pages | Phys. Rev. A 76, 032107 (2007) | 10.1103/PhysRevA.76.032107 | null | quant-ph | null | We consider the quantum fluctuations of the Casimir-Polder force between a
neutral atom and a perfectly conducting wall in the ground state of the system.
In order to obtain the atom-wall force fluctuation we first define an operator
directly associated to the force experienced by the atom considered as a
polarizable body in an electromagnetic field, and we use a time-averaged force
operator in order to avoid ultraviolet divergences appearing in the fluctuation
of the force. This time-averaged force operator takes into account that any
measurement involves a finite time. We also calculate the Casimir-Polder force
fluctuation for an atom between two conducting walls. Experimental
observability of these Casimir-Polder force fluctuations is also discussed, as
well as the dependence of the relative force fluctuation on the duration of the
measurement.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 12:50:38 GMT"
}
] | 2012-06-05T00:00:00 | [
[
"Messina",
"R.",
""
],
[
"Passante",
"R.",
""
]
] |
0706.1675 | Tapobrata Sarkar | Tapobrata Sarkar, Ajay Singh | On Phases of Generic Toric Singularities | 1+17 Pages, LaTeX | JHEP 0712:021,2007 | 10.1088/1126-6708/2007/12/021 | null | hep-th | null | We systematically study the phases of generic toric singularities, using
methods initiated in hep-th/0612046. These correspond to Gauged Linear Sigma
Models with arbitrary charges. We show that complete information about generic
$U(1)^r$ GLSMs can be obtained by studying the GLSM Lagrangian, appropriately
modified in the different phases of the theory. This can be used to study the
different phases of $L^{a,b,c}$ spaces and their non-supersymmetric
counterparts.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 12:56:01 GMT"
}
] | 2009-11-18T00:00:00 | [
[
"Sarkar",
"Tapobrata",
""
],
[
"Singh",
"Ajay",
""
]
] |
0706.1676 | Slavek Rucinski | Slavek Rucinski, Rainer Kuschnig, Jaymie M. Matthews, Wojtek Dimitrov,
Theodor Pribulla, David B. Guenther, Anthony F. J. Moffat, Dimitar Sasselov,
Gordon A. H. Walker, Werner W. Weiss | Discovery of the strongly eccentric, short-period binary nature of the
B-type system HD 313926 by the MOST satellite | accepted as a Letter by MNRAS | null | 10.1111/j.1745-3933.2007.00349.x | null | astro-ph | null | The MOST photometric space mission discovered an eclipsing binary among its
guide stars in June 2006 which combines a relatively large eccentricity e =
0.20 with an orbital period of only 2.27 days. HD 313926 appears to consist of
two early-type stars of spectral type B3 - B7. It has a largest eccentricity
among known early-type binaries with periods less than 3.5 d. Despite the large
components indicated by its spectral type and light curve model, and its short
period, the orbit of HD 313926 has not yet circularised so it is probably very
young, even compared to other young B stars.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 13:00:05 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Rucinski",
"Slavek",
""
],
[
"Kuschnig",
"Rainer",
""
],
[
"Matthews",
"Jaymie M.",
""
],
[
"Dimitrov",
"Wojtek",
""
],
[
"Pribulla",
"Theodor",
""
],
[
"Guenther",
"David B.",
""
],
[
"Moffat",
"Anthony F. J.",
""
],
[
"Sasselov",
"Dimitar",
""
],
[
"Walker",
"Gordon A. H.",
""
],
[
"Weiss",
"Werner W.",
""
]
] |
0706.1677 | Michael Baake | Michael Baake (Bielefeld), Daniel Lenz (Chemnitz) and Christoph
Richard (Bielefeld) | Pure point diffraction implies zero entropy for Delone sets with uniform
cluster frequencies | 16 pages; revised and slightly expanded version | Lett. Math. Phys. 82 (2007) 61-77 | 10.1007/s11005-007-0186-7 | null | math.DS math.CO | null | Delone sets of finite local complexity in Euclidean space are investigated.
We show that such a set has patch counting and topological entropy 0 if it has
uniform cluster frequencies and is pure point diffractive. We also note that
the patch counting entropy is 0 whenever the repetitivity function satisfies a
certain growth restriction.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 13:04:18 GMT"
},
{
"version": "v2",
"created": "Fri, 14 Sep 2007 10:40:21 GMT"
}
] | 2008-01-19T00:00:00 | [
[
"Baake",
"Michael",
"",
"Bielefeld"
],
[
"Lenz",
"Daniel",
"",
"Chemnitz"
],
[
"Richard",
"Christoph",
"",
"Bielefeld"
]
] |
0706.1678 | Richard A. Blythe | R. A. Blythe and M. R. Evans | Nonequilibrium Steady States of Matrix Product Form: A Solver's Guide | 127 pages, 31 figures, invited topical review for J. Phys. A (uses
IOP class file) | J. Phys. A Math. Theor. 40 (2007) R333-R441 | 10.1088/1751-8113/40/46/R01 | null | cond-mat.stat-mech | null | We consider the general problem of determining the steady state of stochastic
nonequilibrium systems such as those that have been used to model (among other
things) biological transport and traffic flow. We begin with a broad overview
of this class of driven diffusive systems - which includes exclusion processes
- focusing on interesting physical properties, such as shocks and phase
transitions. We then turn our attention specifically to those models for which
the exact distribution of microstates in the steady state can be expressed in a
matrix product form. In addition to a gentle introduction to this matrix
product approach, how it works and how it relates to similar constructions that
arise in other physical contexts, we present a unified, pedagogical account of
the various means by which the statistical mechanical calculations of
macroscopic physical quantities are actually performed. We also review a number
of more advanced topics, including nonequilibrium free energy functionals, the
classification of exclusion processes involving multiple particle species,
existence proofs of a matrix product state for a given model and more
complicated variants of the matrix product state that allow various types of
parallel dynamics to be handled. We conclude with a brief discussion of open
problems for future research.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 13:11:44 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Blythe",
"R. A.",
""
],
[
"Evans",
"M. R.",
""
]
] |
0706.1679 | Pomponio Alessio | Antonio Azzollini, Alessio Pomponio | Ground state solutions for the nonlinear Schrodinger-Maxwell equations
with a singular potential | 14 pages | null | null | null | math.AP math-ph math.MP | null | We prove the existence of ground state solutions for the nonlinear
Schrodinger-Maxwell equations with a singular potential.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 13:06:39 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Azzollini",
"Antonio",
""
],
[
"Pomponio",
"Alessio",
""
]
] |
0706.1680 | Michael Friedman | Michael Friedman, Mina Teicher | On fundamental groups related to the Hirzebruch surface F_1 | accepted for publication at "Sci. in China, ser. Math"; 22 pages, 11
figures | null | 10.1007/s11425-007-0148-7 | null | math.AG | null | Given a projective surface and a generic projection to the plane, the braid
monodromy factorization (and thus, the braid monodromy type) of the complement
of its branch curve is one of the most important topological invariants, stable
on deformations. From this factorization, one can compute the fundamental group
of the complement of the branch curve, either in C^2 or in CP^2. In this
article, we show that these groups, for the Hirzebruch surface F_{1,(a,b)}, are
almost-solvable. That is - they are an extension of a solvable group, which
strengthen the conjecture on degeneratable surfaces.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 13:06:53 GMT"
}
] | 2015-05-13T00:00:00 | [
[
"Friedman",
"Michael",
""
],
[
"Teicher",
"Mina",
""
]
] |
0706.1681 | Lo\"ic Bervas | D. Lebeugle, D. Colson, A. Forget, M. Viret | Very large spontaneous electric polarization in BiFeO3 single crystals
at room temperature and its evolution under cycling fields | 8 pages, 3 figures | null | 10.1063/1.2753390 | SPEC-S07/048 | cond-mat.mtrl-sci | null | Electric polarization loops are measured at room temperature on highly pure
BiFeO3 single crystals synthesized by a flux growth method. Because the
crystals have a high electrical resistivity, the resulting low leakage currents
allow us to measure a large spontaneous polarization reaching 100
microC.cm^{-2}, a value never reported in the bulk. During electric cycling,
the slow degradation of the material leads to an evolution of the hysteresis
curves eventually preventing full saturation of the crystals.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 17:25:54 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Lebeugle",
"D.",
""
],
[
"Colson",
"D.",
""
],
[
"Forget",
"A.",
""
],
[
"Viret",
"M.",
""
]
] |
0706.1682 | Michael Bazot | M. Bazot, F. Bouchy, H. Kjeldsen, S. Charpinet, M. Laymand and S.
Vauclair | Asteroseismology of alpha Cen A. Evidence of rotational splitting | 10 pages, 9 figures. To be published in A&A | null | 10.1051/0004-6361:20065694 | null | astro-ph | null | Asteroseismology provides a unique tool for studying stellar interiors.
Recently p modes have been detected on the bright solar-like star alpha Cen A
thanks to high-precision radial-velocity measurements. However a better
characterisation of these p modes is clearly needed to constrain theoretical
models. We observed alpha Cen A during five nights using the HARPS spectrograph
in order to improve our knowledge of the seismic properties of this star. We
performed high-precision radial-velocity sequences and computed the acoustic
spectrum of alpha Cen A. We identify 34 p modes with angular degree l=0-3 in
the frequency range 1.8-2.9 mHz and amplitude range 13-48 cm/s, in agreement
with previous seismic studies. We find an enhancement of the frequency scatter
with the angular degree l that indicates, considering the high inclination axis
of alpha Cen A, rotational splitting and explains the low values of previously
suggested mode lifetimes. We also derive new values for the small separations
that take the effect of rotational splitting into account . Our seismic study
of alpha Cen A leads to a list of now well identified p-mode frequencies and
shows the importance of taking the rotation into account in order to properly
characterise the p modes even in quite short campaigns.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 13:23:47 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Bazot",
"M.",
""
],
[
"Bouchy",
"F.",
""
],
[
"Kjeldsen",
"H.",
""
],
[
"Charpinet",
"S.",
""
],
[
"Laymand",
"M.",
""
],
[
"Vauclair",
"S.",
""
]
] |
0706.1683 | V. Thanh Ngo | D.L. Hien, N.T. Nhan, V. Thanh Ngo, and N.A. Viet | Simple Combined Model for Nonlinear Excitations in DNA | 6 pages, 10 figures, submitted to Phys. Rev. E | Phys. Rev. E 76, 021921 (2007) | 10.1103/PhysRevE.76.021921 | null | physics.bio-ph physics.atm-clus | null | We propose a new simple model for DNA denaturation bases on the pendulum
model of Englander\cite{A1} and the microscopic model of Peyrard {\it et
al.},\cite{A3} so called "combined model". The main parameters of our model
are: the coupling constant $k$ along each strand, the mean stretching $y^\ast$
of the hydrogen bonds, the ratio of the damping constant and driven force
$\gamma/F$. We show that both the length $L$ of unpaired bases and the velocity
$v$ of kinks depend on not only the coupling constant $k$ but also the
temperature $T$. Our results are in good agreement with previous works.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 13:21:51 GMT"
}
] | 2007-08-23T00:00:00 | [
[
"Hien",
"D. L.",
""
],
[
"Nhan",
"N. T.",
""
],
[
"Ngo",
"V. Thanh",
""
],
[
"Viet",
"N. A.",
""
]
] |
0706.1684 | Peter Faber | Peter Faber and Alice C. Quillen | The Total Number of Giant Planets in Debris Disks with Central Clearings | 6 pages, 2 figures | null | null | null | astro-ph | null | Infrared spectra from the Spitzer Space Telescope (SSC) of many debris disks
are well fit with a single black body temperature which suggest clearings
within the disk. We assume that inside the clearing orbital instability due to
planets removes dust generating planetesimal belts and dust generated by the
outer disk that is scattered or drifts into the clearing. From numerical
integrations we estimate a minimum planet spacing required for orbital
instability (and so planetesimal and dust removal) as a function of system age
and planet mass. We estimate that a 10^8 year old debris disk with a dust disk
edge at a radius of 50 AU hosted by an A star must contain approximately 5
Neptune mass planets between the clearing radius and the iceline in order to
remove all primordial objects within it. We infer that known debris disk
systems contain at least a fifth of a Jupiter mass in massive planets. The
number of planets and spacing required is insensitive to the assumed planet
mass. However an order of magnitude higher total mass in planets could reside
in these systems if the planets are more massive.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 13:27:11 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Faber",
"Peter",
""
],
[
"Quillen",
"Alice C.",
""
]
] |
0706.1685 | V. Thanh Ngo | T. T. Nhan, N. T. Nhan, V. Thanh Ngo, N. A. Viet | Theory on Plasmon Modes of the Cell Membranes | 4 pages, 4 figures, submitted to Phys. Lett. A | null | null | null | physics.bio-ph physics.gen-ph | null | Considering the plasmon oscillation of each layer of the cell membranes as a
quasi-particle, we introduce a simple model for the membrane collective charge
excitations, take into account the surface effective potential of the
plasmon-plasmon interaction between two layers. By using the useful Bogoliubov
transformation method, we easily obtained the expressions of the frequencies of
plasmon oscillations as a function of wave-number $k$ and membrane thickness
$d$, magnitude of these frequencies is in the order of $\sqrt{kd}$. Our results
are in good agreement with ones obtained by E. Manousakis.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 13:36:50 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Nhan",
"T. T.",
""
],
[
"Nhan",
"N. T.",
""
],
[
"Ngo",
"V. Thanh",
""
],
[
"Viet",
"N. A.",
""
]
] |
0706.1686 | Matatyahu Rubin | Robert Bonnet, Matatyahu Rubin | A classification of CO spaces which are continuous images of compact
ordered spaces | null | null | null | null | math.GN | null | A compact Hausdorff space X is called a CO space, if every closed subset of X
is homeomorphic to an open subset of X. Every successor ordinal with its order
topology is a CO space. We find an explicit characterization of the class K of
CO spaces which are a continuous image of a Dedkind complete totally ordered
set. (The topology of a totally ordered set is taken to be its order topology).
We show that every member of K can be described as a finite disjoint sum of
very simple spaces. Every summand has either form: (1) mu + 1 + nu^*, where mu
and nu are cardinals, and nu^* is the reverse order of nu; or (2) the summand
is the 1-point-compactification of a discrete space with cardinality aleph_1.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 18:54:44 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Bonnet",
"Robert",
""
],
[
"Rubin",
"Matatyahu",
""
]
] |
0706.1687 | Gabriel Mart\'inez-Pinedo | K. Langanke, G. Martinez-Pinedo, B. Mueller, H.-Th. Janka, A. Marek,
W.R. Hix, A. Juodagalvis, J. M. Sampaio | Effects of Inelastic Neutrino-Nucleus Scattering on Supernova Dynamics
and Radiated Neutrino Spectra | 4 pages, 2 figures, 1 table | Phys.Rev.Lett.100:011101, 2008 | 10.1103/PhysRevLett.100.011101 | null | astro-ph hep-ex nucl-ex nucl-th | null | Based on the shell model for Gamow-Teller and the Random Phase Approximation
for forbidden transitions, we have calculated reaction rates for inelastic
neutrino-nucleus scattering (INNS) under supernova (SN) conditions, assuming a
matter composition given by Nuclear Statistical Equilibrium. The rates have
been incorporated into state-of-the-art stellar core-collapse simulations with
detailed energy-dependent neutrino transport. While no significant effect on
the SN dynamics is observed, INNS increases the neutrino opacities noticeably
and strongly reduces the high-energy tail of the neutrino spectrum emitted in
the neutrino burst at shock breakout. Relatedly the expected event rates for
the observation of such neutrinos by earthbound detectors are reduced by up to
about 60%.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 13:38:59 GMT"
}
] | 2014-11-18T00:00:00 | [
[
"Langanke",
"K.",
""
],
[
"Martinez-Pinedo",
"G.",
""
],
[
"Mueller",
"B.",
""
],
[
"Janka",
"H. -Th.",
""
],
[
"Marek",
"A.",
""
],
[
"Hix",
"W. R.",
""
],
[
"Juodagalvis",
"A.",
""
],
[
"Sampaio",
"J. M.",
""
]
] |
0706.1688 | Yuri Kuznetsov | E.J. Doedel, B.W. Kooi, Yu.A. Kuznetsov and G.A.K. van Voorn | Continuation of connecting orbits in 3D-ODEs: (I) Point-to-cycle
connections | 18 pages, 10 figures | Int. J. Bifurcation & Chaos 18 (2008), 1889-1903 | 10.1142/S0218127408021439 | arXive:0706.1688 | math.DS math.NA | null | We propose new methods for the numerical continuation of point-to-cycle
connecting orbits in 3-dimensional autonomous ODE's using projection boundary
conditions. In our approach, the projection boundary conditions near the cycle
are formulated using an eigenfunction of the associated adjoint variational
equation, avoiding costly and numerically unstable computations of the
monodromy matrix. The equations for the eigenfunction are included in the
defining boundary-value problem, allowing a straightforward implementation in
AUTO, in which only the standard features of the software are employed.
Homotopy methods to find connecting orbits are discussed in general and
illustrated with several examples, including the Lorenz equations. Complete
AUTO demos, which can be easily adapted to any autonomous 3-dimensional ODE
system, are freely available.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 14:19:33 GMT"
},
{
"version": "v2",
"created": "Tue, 11 Dec 2007 09:54:16 GMT"
}
] | 2017-12-11T00:00:00 | [
[
"Doedel",
"E. J.",
""
],
[
"Kooi",
"B. W.",
""
],
[
"Kuznetsov",
"Yu. A.",
""
],
[
"van Voorn",
"G. A. K.",
""
]
] |
0706.1689 | A. V. Balatsky | Hari P. Dahal, Tim O. Wehling, Kevin S. Bedell, Jian-Xin Zhu, A. V.
Balatsky | Wigner crystallization in a single and bilayer graphene | 5 pages, latex file, 4 ps figure files | null | null | null | cond-mat.str-el cond-mat.mes-hall | null | We study the possibility of Wigner crystallization in both single- and and
bi-layer graphene using a real space tight binding model. In addition to
verifying our earlier prediction for single layer graphene, we predict that the
bilayer graphene can undergo a Wigner crystal transition at low enough carrier
density thus offering a possibility of tunable and bipolar Wigner crystal. We
find that aside from the Coulomb interaction of the carriers of two layers that
stabilizes the charge ordered state, so does the inter layer coupling.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 18:51:40 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Dahal",
"Hari P.",
""
],
[
"Wehling",
"Tim O.",
""
],
[
"Bedell",
"Kevin S.",
""
],
[
"Zhu",
"Jian-Xin",
""
],
[
"Balatsky",
"A. V.",
""
]
] |
0706.1690 | Eduard De La Cruz Burelo | D0 Collaboration, V. Abazov, et al | Direct observation of the strange b baryon Xi_b^{-} | Version published in Phys. Rev. Lett | Phys.Rev.Lett.99:052001,2007 | 10.1103/PhysRevLett.99.052001 | Fermilab-Pub-07/196-E | hep-ex | null | We report the first direct observation of the strange b baryon Xi_b^{-}. We
reconstruct the decay Xi_b^{-} to J/psi Xi^{-}, with J/psi to dimuons and
Xi^{-} to Lambda pion, in ppbar collisions at sqrt(s) = 1.96 TeV. Using 1.3
fb^{-1} of data collected by the D0 detector, we observe 15.2 +/- 4.4(stat.)+
1.9/-0.4(syst.) Xi_b^{-} candidates at a mass of 5.774 +/- 0.011(stat.) +/-
0.015 (syst.) GeV. The significance of the observed signal is 5.5 sigmas,
equivalent to a probability of 3.3 X 10^{-8} of it arising from a background
fluctuation. Normalizing to the decay Lambda_b to J/psi Lambda, we measure the
relative rate to be 0.28 +/- 0.09(stat.)+ 0.09/-0.08 (syst.).
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 19:54:21 GMT"
},
{
"version": "v2",
"created": "Wed, 13 Jun 2007 01:05:40 GMT"
},
{
"version": "v3",
"created": "Fri, 31 Aug 2007 12:31:57 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"D0 Collaboration",
"",
""
],
[
"Abazov",
"V.",
""
]
] |
0706.1691 | Yi Wang | Miao Li, Yi Wang | A Stochastic Measure for Eternal Inflation | 11 pages, 1 figure | JCAP 0708:007,2007 | 10.1088/1475-7516/2007/08/007 | USTC-ICTS-07-14 | hep-th astro-ph gr-qc | null | We use the stochastic approach to investigate the measure for slow roll
eternal inflation. The probability for the universe of a given Hubble radius
can be calculated in this framework. In a solvable model, it is shown that the
probability for the universe to evolve from a state with a smaller Hubble
radius to that of a larger Hubble radius is dominated by the classical
probability without the stochastic source. While the probability for the
universe to evolve from a larger Hubble radius to a smaller one is suppressed
by $\exp(-\Delta S)$, where the de Sitter entropy $S$ arises naturally in this
stochastic approach.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 14:00:06 GMT"
}
] | 2009-11-18T00:00:00 | [
[
"Li",
"Miao",
""
],
[
"Wang",
"Yi",
""
]
] |
0706.1692 | Cyrille Chavet | Cyrille Chavet (LESTER, STM), Philippe Coussy (LESTER), Pascal Urard
(STM), Eric Martin (LESTER) | A Methodology for Efficient Space-Time Adapter Design Space Exploration:
A Case Study of an Ultra Wide Band Interleaver | ISBN:1-4244-0921-7 | Proceedings of the IEEE International Symposium on Circuits and
Systems (ISCAS) (28/05/2007) 2946 | null | null | cs.AR | null | This paper presents a solution to efficiently explore the design space of
communication adapters. In most digital signal processing (DSP) applications,
the overall architecture of the system is significantly affected by
communication architecture, so the designers need specifically optimized
adapters. By explicitly modeling these communications within an effective
graph-theoretic model and analysis framework, we automatically generate an
optimized architecture, named Space-Time AdapteR (STAR). Our design flow inputs
a C description of Input/Output data scheduling, and user requirements
(throughput, latency, parallelism...), and formalizes communication constraints
through a Resource Constraints Graph (RCG). The RCG properties enable an
efficient architecture space exploration in order to synthesize a STAR
component. The proposed approach has been tested to design an industrial data
mixing block example: an Ultra-Wideband interleaver.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 13:45:50 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Chavet",
"Cyrille",
"",
"LESTER, STM"
],
[
"Coussy",
"Philippe",
"",
"LESTER"
],
[
"Urard",
"Pascal",
"",
"STM"
],
[
"Martin",
"Eric",
"",
"LESTER"
]
] |
0706.1693 | Israfil Guseinov | I.I.Guseinov | Unsymmetrical and symmetrical one-range addition theorems for Slater
type orbitals and Coulomb-Yukawa like correlated interaction potentials of
integer and noninteger indices | 5 pages | null | null | null | physics.chem-ph | null | Using one-center expansion relations for the Slater type orbitals (STOs) of
noninteger principal quantum numbers in terms of integer n STOs derived in this
study with the help of - exponential type orbitals (-ETOs, the general formulas
are established for the unsymmetrical and symmetrical one-range addition
theorems of STOs and Coulomb-Yukawa like correlated interaction potentials
(CIPs) with integer and noninteger indices. The final results are especially
useful for computations of arbitrary multicenter multielectron integrals over
STOs that arise in the Hartree-Fock-Roothaan (HFR) approximation and also in
the correlated methods which play a significant role in theory and application
to quantum mechanics of atoms, molecules, and solids.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 13:47:27 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Guseinov",
"I. I.",
""
]
] |
0706.1694 | Claude Warnick | G. Holzegel, T. Schmelzer, C. Warnick | Ricci Flow of Biaxial Bianchi IX Metrics | 19 pages, 8 figures | null | null | DAMTP-2007-53 | hep-th | null | We use the Ricci flow with surgery to study four-dimensional SU(2) x
U(1)-symmetric metrics on a manifold with fixed boundary given by a squashed
3-sphere. Depending on the initial metric we show that the flow converges to
either the Taub-Bolt or the Taub-NUT metric, the latter case potentially
requiring surgery at some point in the evolution. The Ricci flow allows us to
explore the Euclidean action landscape within this symmetry class. This work
extends the recent work of Headrick and Wiseman to more interesting topologies.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 13:47:55 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Holzegel",
"G.",
""
],
[
"Schmelzer",
"T.",
""
],
[
"Warnick",
"C.",
""
]
] |
0706.1695 | Tony Lelievre | Tony Lelievre (CERMICS), Felix Otto (Institute for Applied Mathematics
Universitat Bonn), Mathias Rousset (CERMICS), Gabriel Stoltz (CERMICS) | Long-time convergence of an Adaptive Biasing Force method | null | null | null | null | math.AP cond-mat.stat-mech physics.comp-ph | null | We propose a proof of convergence of an adaptive method used in molecular
dynamics to compute free energy profiles. Mathematically, it amounts to
studying the long-time behavior of a stochastic process which satisfies a
non-linear stochastic differential equation, where the drift depends on
conditional expectations of some functionals of the process. We use entropy
techniques to prove exponential convergence to the stationary state.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 13:48:27 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Lelievre",
"Tony",
"",
"CERMICS"
],
[
"Otto",
"Felix",
"",
"Institute for Applied Mathematics\n Universitat Bonn"
],
[
"Rousset",
"Mathias",
"",
"CERMICS"
],
[
"Stoltz",
"Gabriel",
"",
"CERMICS"
]
] |
0706.1696 | Sannino Francesco | R. Foadi, M.T. Frandsen, T. A. Ryttov, F. Sannino | Minimal Walking Technicolor: Set Up for Collider Physics | 42 pages, 3 figures. RevTex format | Phys.Rev.D76:055005,2007 | 10.1103/PhysRevD.76.055005 | null | hep-ph | null | Different theoretical and phenomenological aspects of the Minimal and
Nonminimal Walking Technicolor theories have recently been studied. The goal
here is to make the models ready for collider phenomenology. We do this by
constructing the low energy effective theory containing scalars, pseudoscalars,
vector mesons and other fields predicted by the minimal walking theory. We
construct their self-interactions and interactions with standard model fields.
Using the Weinberg sum rules, opportunely modified to take into account the
walking behavior of the underlying gauge theory, we find interesting relations
for the spin-one spectrum. We derive the electroweak parameters using the newly
constructed effective theory and compare the results with the underlying gauge
theory. Our analysis is sufficiently general such that the resulting model can
be used to represent a generic walking technicolor theory not at odds with
precision data.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 13:48:31 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Foadi",
"R.",
""
],
[
"Frandsen",
"M. T.",
""
],
[
"Ryttov",
"T. A.",
""
],
[
"Sannino",
"F.",
""
]
] |
0706.1697 | Adele Naddeo | Ferdinando Mancini, Adele Naddeo | Equations of motion approach to the spin-1/2 Ising model on the Bethe
lattice | RevTex, 29 pages, 13 figures | Phys. Rev. E 74 (2006) 061108 | 10.1103/PhysRevE.74.061108 | null | cond-mat.stat-mech cond-mat.str-el | null | We exactly solve the ferromagnetic spin-1/2 Ising model on the Bethe lattice
in the presence of an external magnetic field by means of the equations of
motion method within the Green's function formalism. In particular, such an
approach is applied to an isomorphic model of localized Fermi particles
interacting via an intersite Coulomb interaction. A complete set of
eigenoperators is found together with the corresponding eigenvalues. The
Green's functions and the correlation functions are written in terms of a
finite set of parameters to be self-consistently determined. A procedure is
developed, that allows us to exactly fix the unknown parameters in the case of
a Bethe lattice with any coordination number z. Non-local correlation functions
up to four points are also provided together with a study of the relevant
thermodynamic quantities.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 13:48:34 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Mancini",
"Ferdinando",
""
],
[
"Naddeo",
"Adele",
""
]
] |
0706.1698 | Wing Yan Yip | Wing Yan Yip, David Stephens, Sofia Olhede | The Explicit Chaotic Representation of the powers of increments of Levy
Processes | 41 pages | null | null | TR-07-04 | math.PR math.ST stat.TH | null | An explicit formula for the chaotic representation of the powers of
increments, (X_{t+t_0}-X_{t_0})^n, of a Levy process is presented. There are
two different chaos expansions of a square integrable functional of a Levy
process: one with respect to the compensated Poisson random measure and the
other with respect to the orthogonal compensated powers of the jumps of the
Levy process. Computationally explicit formulae for both of these chaos
expansions of (X_{t+t_0}-X_{t_0})^n are given in this paper. Simulation results
verify that the representation is satisfactory. The CRP of a number of
financial derivatives can be found by expressing them in terms of
(X_{t+t_0}-X_{t_0})^n using Taylor's expansion.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 19:20:33 GMT"
},
{
"version": "v2",
"created": "Tue, 12 Jun 2007 22:32:48 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Yip",
"Wing Yan",
""
],
[
"Stephens",
"David",
""
],
[
"Olhede",
"Sofia",
""
]
] |
0706.1699 | Jacques Marteau | J.Marteau (for the OPERA collaboration) | OPERA first events from the CNGS neutrino beam | 6 pages, 9 figures Proceedings of the XLIInd Rencontres de Moriond
session, La Thuile, 10-17 March 2007 | null | null | null | hep-ex | null | The aim of the OPERA experiment is to search for the appearance of the tau
neutrino in the quasi pure muon neutrino beam produced at CERN (CNGS). The
detector, installed in the Gran Sasso underground laboratory 730 km away from
CERN, consists of a lead/emulsion target complemented with electronic
detectors. A report is given on the detector status (construction, data taking
and analysis) and on the first successful 2006 neutrino runs.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 14:04:21 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Marteau",
"J.",
"",
"for the OPERA collaboration"
]
] |
0706.1700 | Guilhem Coq | Guilhem Coq (1), Olivier Alata (2), Marc Arnaudon (1), Christian
Olivier (2) ((1) Laboratoire de Math\'ematiques et Applications Poitiers
France, (2) Laboratoire Signal Image et Communications Poitiers France) | Information Criteria and Arithmetic Codings : An Illustration on Raw
Images | 5 pages, 6 figures, First published in Proceedings og the 15th
European Signal processing Conference EUSIPCO 2007 in 2007, published by
EURASIP | null | null | null | cs.IT math.IT | null | In this paper we give a short theoretical description of the general
predictive adaptive arithmetic coding technique. The links between this
technique and the works of J. Rissanen in the 80's, in particular the BIC
information criterion used in parametrical model selection problems, are
established. We also design lossless and lossy coding techniques of images. The
lossless technique uses a mix between fixed-length coding and arithmetic coding
and provides better compression results than those separate methods. That
technique is also seen to have an interesting application in the domain of
statistics since it gives a data-driven procedure for the non-parametrical
histogram selection problem. The lossy technique uses only predictive adaptive
arithmetic codes and shows how a good choice of the order of prediction might
lead to better results in terms of compression. We illustrate those coding
techniques on a raw grayscale image.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 14:09:09 GMT"
}
] | 2007-07-13T00:00:00 | [
[
"Coq",
"Guilhem",
""
],
[
"Alata",
"Olivier",
""
],
[
"Arnaudon",
"Marc",
""
],
[
"Olivier",
"Christian",
""
]
] |
0706.1701 | Gabor Kun | Gabor Kun | Constraints, MMSNP and expander relational structures | 12 pages, 1 figure, Combinatorica, to appear | null | null | null | math.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a poly-time construction for a combinatorial classic known as Sparse
Incomparability Lemma, studied by Erdos, Lovasz, Nesetril, Rodl and others: We
show that every Constraint Satisfaction Problem is poly-time equivalent to its
restriction to structures with large girth. This implies that the complexity
classes CSP and Monotone Monadic Strict NP introduced by Feder and Vardi are
computationally equivalent. The technical novelty of the paper is a concept of
expander relations and a new type of product for relational structures: a
generalization of the zig-zag product, the twisted product.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 14:11:32 GMT"
},
{
"version": "v2",
"created": "Wed, 13 Mar 2013 20:26:27 GMT"
}
] | 2013-03-15T00:00:00 | [
[
"Kun",
"Gabor",
""
]
] |
0706.1702 | Marco Polini | Saeed H. Abedinpour, Marco Polini, A.H. MacDonald, B. Tanatar, M.P.
Tosi, and G. Vignale | Theory of the Pseudospin Resonance in Semiconductor Bilayers | 4+ pages, 3 figures, submitted | Phys. Rev. Lett. 99, 206802 (2007) | 10.1103/PhysRevLett.99.206802 | null | cond-mat.mes-hall cond-mat.str-el | null | The pseudospin degree of freedom in a semiconductor bilayer gives rise to a
collective mode analogous to the ferromagnetic resonance mode of a ferromagnet.
We present a theory of the dependence of the energy and the damping of this
mode on layer separation $d$. Based on these results, we discuss the
possibility of realizing transport-current driven pseudospin-transfer
oscillators in semiconductors.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 14:13:15 GMT"
}
] | 2007-11-14T00:00:00 | [
[
"Abedinpour",
"Saeed H.",
""
],
[
"Polini",
"Marco",
""
],
[
"MacDonald",
"A. H.",
""
],
[
"Tanatar",
"B.",
""
],
[
"Tosi",
"M. P.",
""
],
[
"Vignale",
"G.",
""
]
] |
0706.1703 | Kate Land | Kate Land and Anze Slosar | Correlation between galactic HI and the Cosmic Microwave Background | 4 pages, 4 figures, accepted in PRD brief report | Phys.Rev.D76:087301,2007 | 10.1103/PhysRevD.76.087301 | null | astro-ph | null | We revisit the issue of a correlation between the atomic hydrogen gas in our
local Galaxy and the Cosmic Microwave Background (CMB), a detection of which
has been claimed in some literature. We cross-correlate the 21-cm emission of
Galactic atomic hydrogen as traced by the Leiden/Argentine/Bonn Galactic HI
survey with the 3-year CMB data from the Wilkinson Microwave Anisotropy Probe.
We consider a number of angular scales, masks, and HI velocity slices and find
no statistically significant correlation.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 18:50:11 GMT"
},
{
"version": "v2",
"created": "Fri, 31 Aug 2007 12:36:24 GMT"
}
] | 2008-12-18T00:00:00 | [
[
"Land",
"Kate",
""
],
[
"Slosar",
"Anze",
""
]
] |
0706.1704 | Gabor Kun | Gabor Kun, Jaroslav Nesetril | Forbidden lists (NP and CSP for combinatorialists) | 22 pages, 3 figures, | null | null | null | math.CO | null | We present a definition of the class NP in combinatorial context as the set
of languages of structures defined by finitely many forbidden lifted
substructures. We apply this to special syntactically defined subclasses and
show how they correspond to naturally defined (and intensively studied)
combinatorial problems. We show that some types of combinatorial problems like
edge colorings and graph decompositions express the full computational power of
the class NP. We then characterize Constraint Satisfaction Problems (i.e.
H-coloring problems) which are expressible by finitely many forbidden lifted
substructures. This greatly simplifies and generalizes the earlier attempts to
characterize this problem. As a corollary of this approach we perhaps find a
proper setting of Feder and Vardi analysis of CSP languages within the class
MMSNP.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 14:20:09 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Kun",
"Gabor",
""
],
[
"Nesetril",
"Jaroslav",
""
]
] |
0706.1705 | Bijaya Sahoo Dr. | B. K. Sahoo, B. P. Das, R. K. Chaudhuri, D. Mukherjee, R. G. E.
Timmermans and K. Jungmann | Investigations of Ra$^+$ properties to test possibilities of new optical
frequency standards | Latex files, 5 pages, 1 figure | null | 10.1103/PhysRevA.76.040504 | null | physics.atom-ph physics.optics | null | The present work tests the suitability of the narrow transitions $7s \
^2S_{1/2} \to 6d ^2D_{3/2}$ and $7s ^2S_{1/2} \to 6d ^2D_{5/2}$ in Ra$^+$ for
optical frequency standard studies. Our calculations of the lifetimes of the
metastable $6d$ states using the relativistic coupled-cluster theory suggest
that they are sufficiently long for Ra$^+$ to be considered as a potential
candidate for an atomic clock. This is further corroborated by our studies of
the hyperfine interactions, dipole and quadrupole polarizabilities and
quadrupole moments of the appropriate states of this system.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 14:23:43 GMT"
},
{
"version": "v2",
"created": "Wed, 13 Jun 2007 17:03:57 GMT"
},
{
"version": "v3",
"created": "Wed, 13 Jun 2007 20:01:32 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Sahoo",
"B. K.",
""
],
[
"Das",
"B. P.",
""
],
[
"Chaudhuri",
"R. K.",
""
],
[
"Mukherjee",
"D.",
""
],
[
"Timmermans",
"R. G. E.",
""
],
[
"Jungmann",
"K.",
""
]
] |
0706.1706 | Diego Paz\'o | Ivan G. Szendro, Diego Paz\'o, Miguel A. Rodr\'iguez, Juan M. L\'opez | Spatiotemporal structure of Lyapunov vectors in chaotic coupled-map
lattices | null | Phys. Rev. E 76, 025202 (2007) | 10.1103/PhysRevE.76.025202 | null | nlin.CD cond-mat.stat-mech | null | The spatiotemporal dynamics of Lyapunov vectors (LVs) in spatially extended
chaotic systems is studied by means of coupled-map lattices. We determine
intrinsic length scales and spatiotemporal correlations of LVs corresponding to
the leading unstable directions by translating the problem to the language of
scale-invariant growing surfaces. We find that the so-called 'characteristic'
LVs exhibit spatial localization, strong clustering around given spatiotemporal
loci, and remarkable dynamic scaling properties of the corresponding surfaces.
In contrast, the commonly used backward LVs (obtained through Gram-Schmidt
orthogonalization) spread all over the system and do not exhibit dynamic
scaling due to artifacts in the dynamical correlations by construction.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 14:37:48 GMT"
},
{
"version": "v2",
"created": "Thu, 20 Sep 2007 15:32:37 GMT"
}
] | 2007-09-20T00:00:00 | [
[
"Szendro",
"Ivan G.",
""
],
[
"Pazó",
"Diego",
""
],
[
"Rodríguez",
"Miguel A.",
""
],
[
"López",
"Juan M.",
""
]
] |
0706.1707 | Jean-Yves Ollitrault | Hans-Joachim Drescher, Adrian Dumitru, and Jean-Yves Ollitrault | The centrality dependence of elliptic flow at LHC | Proceedings of the CERN Workshop "Heavy Ion Collisions at the LHC:
Last Call for Predictions", | null | null | null | nucl-th | null | We present predictions for the centrality dependence of elliptic flow at
mid-rapidity in Pb-Pb collisions at the LHC.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 14:38:51 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Drescher",
"Hans-Joachim",
""
],
[
"Dumitru",
"Adrian",
""
],
[
"Ollitrault",
"Jean-Yves",
""
]
] |
0706.1708 | Koichiro Matsumoto | Hiromichi Kaneko, Yoshihisa Kitazawa and Koichiro Matsumoto | Effective Actions of IIB Matrix Model on S^3 | 34 pages, 2 figures; added comments, corrected typos | Phys.Rev.D76:084024,2007 | 10.1103/PhysRevD.76.084024 | KEK-TH-1159 | hep-th | null | S^3 is a simple principle bundle which is locally S^2 \times S^1. It has been
shown that such a space can be constructed in terms of matrix models. It has
been also shown that such a space can be realized by a generalized
compactification procedure in the S^1 direction. We investigate the effective
action of supersymmetric gauge theory on S^3 with an angular momentum cutoff
and that of a matrix model compactification. The both cases can be realized in
a deformed IIB matrix model with a Myers Term. We find that the highly
divergent contributions at the tree and one loop level are sensitive to the uv
cutoff. However the two loop level contributions are universal since they are
only logarithmically divergent. We expect that the higher loop contributions
are insensitive to the uv cutoff since 3d gauge theory is super renormalizable.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 14:41:09 GMT"
},
{
"version": "v2",
"created": "Wed, 4 Jul 2007 12:37:41 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Kaneko",
"Hiromichi",
""
],
[
"Kitazawa",
"Yoshihisa",
""
],
[
"Matsumoto",
"Koichiro",
""
]
] |
0706.1709 | Gursel Hacibekiroglu | G. Hacibekiroglu, M. Caglar and Y. Polatoglu | The Higher Order Schwarzian Derivative: Its Applications for Chaotic
Behavior and New Invariant Sufficient Condition of Chaos | 8 pages | null | 10.1016/j.nonrwa.2008.01.004 | S1468-1218(08)00010-2 | nlin.CD | null | The Schwarzian derivative of a function f(x) which is defined in the interval
(a, b) having higher order derivatives is given by
Sf(x)=(f''(x)/f'(x))'-1/2(f''(x)/f'(x))^2 . A sufficient condition for a
function to behave chaotically is that its Schwarzian derivative is negative.
In this paper, we try to find a sufficient condition for a non-linear dynamical
system to behave chaotically. The solution function of this system is a higher
degree polynomial. We define n-th Schwarzian derivative to examine its general
properties. Our analysis shows that the sufficient condition for chaotic
behavior of higher order polynomial is provided if its highest order three
terms satisfy an inequality which is invariant under the degree of the
polynomial and the condition is represented by Hankel determinant of order 2.
Also the n-th order polynomial can be considered to be the partial sum of real
variable analytic function. Let this analytic function be the solution of
non-linear differential equation, then the sufficient condition for the
chaotical behavior of this function is the Hankel determinant of order 2
negative, where the elements of this determinant are the coefficient of the
terms of n, n-1, n-2 in Taylor expansion.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 14:42:54 GMT"
}
] | 2008-03-31T00:00:00 | [
[
"Hacibekiroglu",
"G.",
""
],
[
"Caglar",
"M.",
""
],
[
"Polatoglu",
"Y.",
""
]
] |
0706.1710 | Michael Prouza | Segev BenZvi, Martina Bohacova, Brian Connolly, Jiri Grygar, Miroslav
Hrabovsky, Tatiana Karova, Dusan Mandat, Petr Necesal, Dalibor Nosek, Libor
Nozka, Miroslav Palatka, Miroslav Pech, Michael Prouza, Jan Ridky, Petr
Schovanek, Radomir Smida, Petr Travnicek, Primo Vitale, and Stefan Westerhoff
(for the Pierre Auger Collaboration) | New method for atmospheric calibration at the Pierre Auger Observatory
using FRAM, a robotic astronomical telescope | Contribution to the 30th International Cosmic Ray Conference, Merida
Mexico, July 2007; 4 pages, 2 figures | null | null | null | astro-ph | null | FRAM - F/(Ph)otometric Robotic Atmospheric Monitor is the latest addition to
the atmospheric monitoring instruments of the Pierre Auger Observatory. An
optical telescope equipped with CCD camera and photometer, it automatically
observes a set of selected standard stars and a calibrated terrestrial source.
Primarily, the wavelength dependence of the attenuation is derived and the
comparison between its vertical values (for stars) and horizontal values (for
the terrestrial source) is made. Further, the integral vertical aerosol optical
depth can be obtained. A secondary program of the instrument, the detection of
optical counterparts of gamma-ray bursts, has already proven successful. The
hardware setup, software system, data taking procedures, and first analysis
results are described in this paper.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 14:52:11 GMT"
}
] | 2019-08-13T00:00:00 | [
[
"BenZvi",
"Segev",
"",
"for the Pierre Auger Collaboration"
],
[
"Bohacova",
"Martina",
"",
"for the Pierre Auger Collaboration"
],
[
"Connolly",
"Brian",
"",
"for the Pierre Auger Collaboration"
],
[
"Grygar",
"Jiri",
"",
"for the Pierre Auger Collaboration"
],
[
"Hrabovsky",
"Miroslav",
"",
"for the Pierre Auger Collaboration"
],
[
"Karova",
"Tatiana",
"",
"for the Pierre Auger Collaboration"
],
[
"Mandat",
"Dusan",
"",
"for the Pierre Auger Collaboration"
],
[
"Necesal",
"Petr",
"",
"for the Pierre Auger Collaboration"
],
[
"Nosek",
"Dalibor",
"",
"for the Pierre Auger Collaboration"
],
[
"Nozka",
"Libor",
"",
"for the Pierre Auger Collaboration"
],
[
"Palatka",
"Miroslav",
"",
"for the Pierre Auger Collaboration"
],
[
"Pech",
"Miroslav",
"",
"for the Pierre Auger Collaboration"
],
[
"Prouza",
"Michael",
"",
"for the Pierre Auger Collaboration"
],
[
"Ridky",
"Jan",
"",
"for the Pierre Auger Collaboration"
],
[
"Schovanek",
"Petr",
"",
"for the Pierre Auger Collaboration"
],
[
"Smida",
"Radomir",
"",
"for the Pierre Auger Collaboration"
],
[
"Travnicek",
"Petr",
"",
"for the Pierre Auger Collaboration"
],
[
"Vitale",
"Primo",
"",
"for the Pierre Auger Collaboration"
],
[
"Westerhoff",
"Stefan",
"",
"for the Pierre Auger Collaboration"
]
] |
0706.1711 | Evgeny Plekhanov | Evgeny Plekhanov, Adolfo Avella, and Ferdinando Mancini | Ergodicity of the extended anisotropic 1D Heisenberg model: response at
low temperatures | reported at the International Conference on Magnetism, August 20-25,
2006 Kyoto, Japan | Journ. Magn. & Magn. Materials 310, e480 (2007) | 10.1016/j.jmmm.2006.10.428 | null | cond-mat.str-el cond-mat.soft | null | We present the results of exact diagonalization calculations of the isolated
and isothermal on-site static susceptibilities in the anisotropic extended
Heisenberg model on a linear chain with periodic boundary conditions. Based on
the ergodicity considerations we conclude that the isothermal susceptibility
will diverge as $T\to 0$ both in finite clusters and in the bulk system in two
non-ergodic regions of the phase diagram of the system.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 14:52:45 GMT"
}
] | 2007-06-13T00:00:00 | [
[
"Plekhanov",
"Evgeny",
""
],
[
"Avella",
"Adolfo",
""
],
[
"Mancini",
"Ferdinando",
""
]
] |
0706.1712 | A. Tureanu | M. Chaichian, M. Mnatsakanova, A. Tureanu, Yu. Vernov | Test Functions Space in Noncommutative Quantum Field Theory | 10 pages, clarification of formula (1.6), typos fixed, minor language
corrections | JHEP 0809:125,2008 | 10.1088/1126-6708/2008/09/125 | HIP-2007-31/TH | hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is proven that the $\star$-product of field operators implies that the
space of test functions in the Wightman approach to noncommutative quantum
field theory is one of the Gel'fand-Shilov spaces $S^{\beta}$ with $\beta <
1/2$. This class of test functions smears the noncommutative Wightman
functions, which are in this case generalized distributions, sometimes called
hyperfunctions. The existence and determination of the class of the test
function spaces in NC QFT is important for any rigorous treatment in the
Wightman approach.
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 14:54:38 GMT"
},
{
"version": "v2",
"created": "Wed, 16 Apr 2008 12:59:25 GMT"
},
{
"version": "v3",
"created": "Sat, 26 Jul 2008 14:59:00 GMT"
}
] | 2009-11-18T00:00:00 | [
[
"Chaichian",
"M.",
""
],
[
"Mnatsakanova",
"M.",
""
],
[
"Tureanu",
"A.",
""
],
[
"Vernov",
"Yu.",
""
]
] |
0706.1713 | Morbidelli Alessandro | Alessandro Morbidelli, Kleomenis Tsiganis, Aurelien Crida, Harold F.
Levison, Rodney Gomes | Dynamics of the giant planets of the solar system in the gaseous
proto-planetary disk and relationship to the current orbital architecture | The Astronomical Journal (17/07/2007) in press | Astron.J.134:1790-1798,2007 | 10.1086/521705 | null | astro-ph | null | We study the orbital evolution of the 4 giant planets of our solar system in
a gas disk. Our investigation extends the previous works by Masset and
Snellgrove (2001) and Morbidelli and Crida (2007, MC07), which focussed on the
dynamics of the Jupiter-Saturn system. The only systems that we found to reach
a steady state are those in which the planets are locked in a quadruple mean
motion resonance (i.e. each planet is in resonance with its neighbor). In total
we found 6 such configurations. For the gas disk parameters found in MC07,
these configurations are characterized by a negligible migration rate. After
the disappearance of the gas, and in absence of planetesimals, only two of
these six configurations (the least compact ones) are stable for a time of
hundreds of millions of years or more. The others become unstable on a
timescale of a few My. Our preliminary simulations show that, when a
planetesimal disk is added beyond the orbit of the outermost planet, the
planets can evolve from the most stable of these configurations to their
current orbits in a fashion qualitatively similar to that described in Tsiganis
et al. (2005).
| [
{
"version": "v1",
"created": "Tue, 12 Jun 2007 14:56:26 GMT"
},
{
"version": "v2",
"created": "Tue, 17 Jul 2007 12:54:26 GMT"
}
] | 2009-06-23T00:00:00 | [
[
"Morbidelli",
"Alessandro",
""
],
[
"Tsiganis",
"Kleomenis",
""
],
[
"Crida",
"Aurelien",
""
],
[
"Levison",
"Harold F.",
""
],
[
"Gomes",
"Rodney",
""
]
] |
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