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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
quant-ph/9502004 | Lev Vaidman | L. Vaidman | IS THERE A CLASSICAL ANALOG OF A QUANTUM TIME-TRANSLATION MACHINE? | 7 pages, LaTeX | null | 10.1103/PhysRevA.52.4297 | TAUP 2233-95 | quant-ph | null | In a recent article [D. Suter, Phys. Rev. {\bf A 51}, 45 (1995)] Suter has
claimed to present an optical implementation of the quantum time-translation
machine which ``shows all the features that the general concept predicts and
also allows, besides the quantum mechanical, a classical description.'' It is
argued that the experiment proposed and performed by Suter does not have the
features of the quantum time-translation machine and that the latter has no
classical analog.
| [
{
"version": "v1",
"created": "Sun, 5 Feb 1995 09:55:58 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Vaidman",
"L.",
""
]
] |
quant-ph/9502005 | Sandu Popescu | Sandu Popescu | Bell's inequalities and density matrices. Revealing hidden nonlocality. | Plain TeX, 12 pg. | Phys.Rev.Lett.74:2619-2622,1995 | 10.1103/PhysRevLett.74.2619 | null | quant-ph | null | As is well known, quantum mechanical behavior cannot, in general, be
simulated by a local hidden variables model. Most -if not all- the proofs of
this incompatibility refer to the correlations which arise when each of two (or
more) systems separated in space is subjected to a single ideal measurement.
This setting is good enough to show contradictions between local hidden
variables models and quantum mechanics in the case of pure states. However, as
shown here, it is not powerful enough in the case of mixtures. This is
illustrated by an example. In this example, the correlations which arise when
each of two systems separated in space is subjected to a single ideal
measurement are classical; only when each system is subjected to a {\it
sequence} of ideal measurements non-classical correlations are obtained. We
also ask whether there are situations for which even this last procedure is not
powerful enough and non-ideal measurements have to be considered as well.
| [
{
"version": "v1",
"created": "Sun, 5 Feb 1995 12:43:55 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Popescu",
"Sandu",
""
]
] |
quant-ph/9502006 | G. Vitiello | Giuseppe Vitiello (Dipartimento di Fisica, Universit\'a di Salerno) | Dissipation and memory capacity in the quantum brain model | 24 pages, Tex file | Int.J.Mod.Phys. B9 (1995) 973 | 10.1142/S0217979295000380 | null | quant-ph | null | The quantum model of the brain proposed by Ricciardi and Umezawa is extended
to dissipative dynamics in order to study the problem of memory capacity. It is
shown that infinitely many vacua are accessible to memory printing in a way
that in sequential information recording the storage of a new information does
not destroy the previously stored ones, thus allowing a huge memory capacity.
The mechanism of information printing is shown to induce breakdown of
time-reversal symmetry. Thermal properties of the memory states as well as
their relation with squeezed coherent states are finally discussed.
| [
{
"version": "v1",
"created": "Mon, 6 Feb 1995 18:08:54 GMT"
}
] | 2015-06-26T00:00:00 | [
[
"Vitiello",
"Giuseppe",
"",
"Dipartimento di Fisica, Universitá di Salerno"
]
] |
quant-ph/9502007 | Luanne Neumann | Takahiro Kawai and Henry P. Stapp | Quantum Electrodynamics at Large Distances III: Verification of Pole
Factorization and the Correspondence Principle | latex, 39 pages, 2 Figures included as uuencoded, tarred, gzipped,
encapsulated postscript files, uses math_macros.tex | Phys.Rev. D52 (1995) 2517-2532 | 10.1103/PhysRevD.52.2517 | LBL-35973 | quant-ph | null | In two companion papers it was shown how to separate out from a scattering
function in quantum electrodynamics a distinguished part that meets the
correspondence-principle and pole-factorization requirements. The integrals
that define the terms of the remainder are here shown to have singularities on
the pertinent Landau singularity surface that are weaker than those of the
distinguished part. These remainder terms therefore vanish, relative to the
distinguished term, in the appropriate macroscopic limits. This shows, in each
order of the perturbative expansion, that quantum electrodynamics does indeed
satisfy the pole-factorization and correspondence-principle requirements in the
case treated here. It also demonstrates the efficacy of the computational
techniques developed here to calculate the consequences of the principles of
quantum electrodynamics in the macroscopic and mesoscopic regimes.
| [
{
"version": "v1",
"created": "Tue, 7 Feb 1995 19:32:04 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Kawai",
"Takahiro",
""
],
[
"Stapp",
"Henry P.",
""
]
] |
quant-ph/9502008 | Karl Svozil | Karl Svozil | Consistent use of paradoxes in deriving constraints on the dynamics of
physical systems and of no-go-theorems | 10 pages, latex, no figures | Annals N.Y.Acad.Sci. 755 (1995) 834-841 | 10.1111/j.1749-6632.1995.tb39024.x | null | quant-ph | null | The classical methods used by recursion theory and formal logic to block
paradoxes do not work in quantum information theory. Since quantum information
can exist as a coherent superposition of the classical ``yes'' and ``no''
states, certain tasks which are not conceivable in the classical setting can be
performed in the quantum setting. Classical logical inconsistencies do not
arise, since there exist fixed point states of the diagonalization operator. In
particular, closed timelike curves need not be eliminated in the quantum
setting, since they would not lead to any paradoxical outcome controllability.
Quantum information theory can also be subjected to the treatment of
inconsistent information in databases and expert systems. It is suggested that
any two pieces of contradicting information are stored and processed as
coherent superposition. In order to be tractable, this strategy requires
quantum computation.
| [
{
"version": "v1",
"created": "Wed, 8 Feb 1995 16:16:01 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Svozil",
"Karl",
""
]
] |
quant-ph/9502009 | Marek Czachor | M. Czachor and K. Rzazewski | Roentgen term makes dipole approximation more divergent | REVTeX 3.0, 3 pages | null | null | null | quant-ph | null | The Roentgen correction to the dipole interaction term leads to an additional
divergency which can be eliminated for infinitely heavy atoms. For M < infinity
a probability of emission in a given direction is represented by a divergent
integral.
| [
{
"version": "v1",
"created": "Wed, 8 Feb 1995 15:15:58 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Czachor",
"M.",
""
],
[
"Rzazewski",
"K.",
""
]
] |
quant-ph/9502010 | Eli Eisenberg | Eli Eisenberg and Larry Horwitz | INTRINSIC MECHANISM FOR ENTROPY CHANGE IN CLASSICAL AND QUANTUM
EVOLUTION | 20 pages. For more information or comments contact E. Eisenberg at
[email protected] (internet). | Phys. Rev. A 52, 70 (1995). | 10.1103/PhysRevA.52.70 | null | quant-ph | null | It is shown that the existence of a time operator in the Liouville space
representation of both classical and quantum evolution provides a mechanism for
effective entropy change of physical states. In particular, an initially
effectively pure state can evolve under the usual unitary evolution to an
effectively mixed state.
| [
{
"version": "v1",
"created": "Tue, 14 Feb 1995 08:44:14 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Eisenberg",
"Eli",
""
],
[
"Horwitz",
"Larry",
""
]
] |
quant-ph/9502011 | Luanne Neumann | Henry P. Stapp | Is Mental Process Non-Computable? | Latex, 9 pages, uses math macros.tex | null | null | LBL-36346 | quant-ph | null | It has recently been claimed that certain aspects of mental processing cannot
be simulated by computers, even in principle. The argument is examined and a
lacuna is identified.
| [
{
"version": "v1",
"created": "Tue, 14 Feb 1995 23:01:06 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Stapp",
"Henry P.",
""
]
] |
quant-ph/9502012 | Luanne Neumann | Henry P. Stapp | Why Classical Mechanics Cannot Naturally Accommodate Consciousness But
Quantum Mechanics Can. | Latex, 25 pages, uses math_macro.tex | null | null | LBL-36574 | quant-ph | null | It is argued on the basis of certain mathematical characteristics that
classical mechanics is not constitutionally suited to accomodate consciousness,
whereas quantum mechanics is. These mathematical characteristics pertain to the
nature of the information represented in the state of the brain, and the way
this information enters into the dynamics.
| [
{
"version": "v1",
"created": "Wed, 15 Feb 1995 00:16:41 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Stapp",
"Henry P.",
""
]
] |
quant-ph/9502013 | Krzysztof Wodkiewicz | B. G. Englert and K. Wodkiewicz | Intrinsic and operational observables in quantum mechanics | 12 pages, REVTEX, no figures. | null | 10.1103/PhysRevA.51.R2661 | null | quant-ph | null | The concept of intrinsic and operational observables in quantum mechanics is
introduced. In any realistic description of a quantum measurement that includes
a macroscopic detecting device, it is possible to construct from the statistics
of the recorded raw data a set of operational quantities that correspond to the
intrinsic quantum mechanical observable.
| [
{
"version": "v1",
"created": "Wed, 15 Feb 1995 15:08:32 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Englert",
"B. G.",
""
],
[
"Wodkiewicz",
"K.",
""
]
] |
quant-ph/9502014 | Peter Nattermann | H.-D. Doebner, G. A. Goldin, P. Nattermann | A FAMILY OF NONLINEAR SCHR\"ODINGER EQUATIONS: LINEARIZING
TRANSFORMATIONS AND RESULTING STRUCTURE | 5 pages, LaTeX, Contribution to the proceedings of the XIII Workshop
on Mathematical Methods in Physics, Bialowieza, July 9--15, 1994. | 'Quantization, Coherent States, and Complex Structures', J.-P.
Antoine et.al. (Eds.), p. 27-31, Plenum 1995 (ISBN 0-306-45214-6) | null | ASI-TPA/8/94 | quant-ph hep-th | null | We examine a recently-proposed family of nonlinear Schr\"odinger equations
[J. Phys. A: Math. Gen. 27:1771(1994)] with respect to a group of
transformations that linearize a subfamily of them. We investigate the
structure of the whole family with respect to the linearizing transformations,
and propose a new, invariant parameterization.
| [
{
"version": "v1",
"created": "Thu, 16 Feb 1995 10:52:17 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Doebner",
"H. -D.",
""
],
[
"Goldin",
"G. A.",
""
],
[
"Nattermann",
"P.",
""
]
] |
quant-ph/9502015 | Fabian Gaioli | Juan P. Aparicio, Fabian H. Gaioli, and Edgardo T. Garcia Alvarez | Interpretation of the evolution parameter of the Feynman parametrization
of the Dirac equation | 6 pages, RevTex, no figures, submitted to Phys. Lett. A | Phys.Lett.A200:233-238,1995 | 10.1016/0375-9601(95)00193-7 | null | quant-ph | null | The Feynman parametrization of the Dirac equation is considered in order to
obtain an indefinite mass formulation of relativistic quantum mechanics. It is
shown that the parameter that labels the evolution is related to the proper
time. The Stueckelberg interpretation of antiparticles naturally arises from
the formalism.
| [
{
"version": "v1",
"created": "Thu, 16 Feb 1995 18:51:00 GMT"
}
] | 2010-11-26T00:00:00 | [
[
"Aparicio",
"Juan P.",
""
],
[
"Gaioli",
"Fabian H.",
""
],
[
"Alvarez",
"Edgardo T. Garcia",
""
]
] |
quant-ph/9502016 | Peter Marzlin | Karl-Peter Marzlin and Juergen Audretsch | THE "FREELY" FALLING TWO-LEVEL ATOM IN A RUNNING LASER WAVE | 14 Pages, Latex | Phys.Rev.A53:1004,1996 | 10.1103/PhysRevA.53.1004 | null | quant-ph gr-qc | null | The time evolution of a two-level atom which is simultaneously exposed to the
field of a running laser wave and a homogeneous gravitational field is studied.
The result of the coupled dynamics of internal transitions and center-of-mass
motion is worked out exactly. Neglecting spontaneous emission and performing
the rotating wave approximation we derive the complete time evolution operator
in an algebraical way by using commutation relations. The result is discussed
with respect to the physical implications. In particular the long time and
short time behaviour is physically analyzed in detail. The breakdown of the
Magnus perturbation expansion is shown.
| [
{
"version": "v1",
"created": "Fri, 17 Feb 1995 13:28:12 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Marzlin",
"Karl-Peter",
""
],
[
"Audretsch",
"Juergen",
""
]
] |
quant-ph/9502017 | Krzysztof Wodkiewicz | K. Wodkiewicz | Nonlocal and local ghost fields in quantum correlations. | 15 pages, REVTEX, 4 figures in encapsulated postscript can be
obtained from the author. | null | 10.1080/00107519508222148 | null | quant-ph | null | Einstein Podolsky Rosen quantum correlations are discussed from the
perspective of a ghost field introduced by Einstein. The concepts of ghost
field, hidden variables, local reality and the Bell inequality are reviewed. In
the framework of the correlated singlet state, it is shown that quantum
mechanics can be cast in a way that has the form of either nonpositive and
local ghost field or a positive and nonlocal ghost field.
| [
{
"version": "v1",
"created": "Fri, 17 Feb 1995 20:37:52 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Wodkiewicz",
"K.",
""
]
] |
quant-ph/9502018 | Hagen Kleinert | W. Janke and H. Kleinert (Johannes Gutenberg-Universit\"at Mainz and
Freie Universit\"at Berlin) | Scaling property of variational perturbation expansion for general
anharmonic oscillator | null | Phys. Lett. A199 (1995) 287 | 10.1016/0375-9601(95)00126-N | null | quant-ph chem-ph | null | We prove a powerful scaling property for the extremality condition in the
recently developed variational perturbation theory which converts divergent
perturbation expansions into exponentially fast convergent ones. The proof is
given for the energy eigenvalues of an anharmonic oscillator with an arbitrary
$x^p$-potential. The scaling property greatly increases the accuracy of the
results.
| [
{
"version": "v1",
"created": "Sun, 19 Feb 1995 06:40:28 GMT"
}
] | 2016-08-15T00:00:00 | [
[
"Janke",
"W.",
"",
"Johannes Gutenberg-Universität Mainz and\n Freie Universität Berlin"
],
[
"Kleinert",
"H.",
"",
"Johannes Gutenberg-Universität Mainz and\n Freie Universität Berlin"
]
] |
quant-ph/9502019 | Hagen Kleinert | W. Janke and H. Kleinert (Johannes Gutenberg-Universit\"at Mainz and
Freie Universit\"at Berlin) | Variational perturbation expansion for strong-coupling coefficients of
the anharmonic oscillator | null | Phys. Rev. Lett. 75 (1995) 2787 | 10.1103/PhysRevLett.75.2787 | null | quant-ph chem-ph | null | As an application of a recently developed variational perturbation theory we
find the first 22 terms of the convergent strong-coupling series expansion for
the ground state energy of the quartic anharmonic oscillator.
| [
{
"version": "v1",
"created": "Sun, 19 Feb 1995 07:13:52 GMT"
}
] | 2016-08-15T00:00:00 | [
[
"Janke",
"W.",
"",
"Johannes Gutenberg-Universität Mainz and\n Freie Universität Berlin"
],
[
"Kleinert",
"H.",
"",
"Johannes Gutenberg-Universität Mainz and\n Freie Universität Berlin"
]
] |
quant-ph/9502020 | Tal Mor | B. Huttner, N. Imoto, N. Gisin, and T. Mor | Quantum Cryptography with Coherent States | 20 pp. Revtex, Figures available from the authors upon request, To be
published in PRA (March 95) | null | 10.1103/PhysRevA.51.1863 | null | quant-ph | null | The safety of a quantum key distribution system relies on the fact that any
eavesdropping attempt on the quantum channel creates errors in the
transmission. For a given error rate, the amount of information that may have
leaked to the eavesdropper depends on both the particular system and the
eavesdropping strategy. In this work, we discuss quantum cryptographic
protocols based on the transmission of weak coherent states and present a new
system, based on a symbiosis of two existing ones, and for which the
information available to the eavesdropper is significantly reduced. This system
is therefore safer than the two previous ones. We also suggest a possible
experimental implementation.
| [
{
"version": "v1",
"created": "Tue, 21 Feb 1995 11:44:48 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Huttner",
"B.",
""
],
[
"Imoto",
"N.",
""
],
[
"Gisin",
"N.",
""
],
[
"Mor",
"T.",
""
]
] |
quant-ph/9502021 | Lior Goldenberg | Lior Goldenberg and Lev Vaidman | Quantum Cryptography Based on Orthogonal States | Latex, 10 pages, 1 figure (decompress with "uudecode" and "unzip").
Submitted to Physical Review Letters. | Phys.Rev.Lett.75:1239-1243,1995 | 10.1103/PhysRevLett.75.1239 | null | quant-ph | null | All existing quantum cryptosystems use non-orthogonal states as the carriers
of information. Non-orthogonal states cannot be cloned (duplicated) by an
eavesdropper. In result, any eavesdropping attempt must introduce errors in the
transmission, and therefore, can be detected by the legal users of the
communication channel. Orthogonal states are not used in quantum cryptography,
since they can be faithfully cloned without altering the transmitted data. In
this Letter we present a cryptographic scheme based on orthogonal states, which
also assures the detection of any eavesdropper.
| [
{
"version": "v1",
"created": "Sat, 25 Feb 1995 03:02:36 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Goldenberg",
"Lior",
""
],
[
"Vaidman",
"Lev",
""
]
] |
quant-ph/9502022 | Vladimir Kisil | Vladimir V. Kisil (CINVESTAV del IPN, Mexico, and Odessa State
University, Ukraine) | Relativistic Quantization and Improved Equation for a Free Relativistic
Particle | 22 p., LaTeX2e, a hard copy or uuencoded DVI-file by e-mail may be
obtained from the Author | Phys.Essays 11 (1998) 69-80 | null | CINVESTAV MATH-179 | quant-ph funct-an hep-th math.FA | null | Usually the only difference between relativistic quantization and standard
one is that the Lagrangian of the system under consideration should be Lorentz
invariant. The standard approaches are logically incomplete and produce
solutions with unpleasant properties: negative-energy, superluminal propagation
etc. We propose a two-projections scheme of (special) relativistic
quantization. The first projection defines the quantization procedure (e.g. the
Berezin-Toeplitz quantization). The second projection defines a casual
structure of the relativistic system (e.g. the operator of multiplication by
the characteristic function of the future cone). The two-projections
quantization introduces in a natural way the existence of three types of
relativistic particles (with $0$, $\frac{1}{2}$, and $1$ spins). Keywords:
Quantization, relativity, spin, Dirac equation, Klein-Gordon equation,
electron, Segal-Bargmann space, Berezin-Toeplitz quantization. AMSMSC Primary:
81P10, 83A05; Secondary: 81R30, 81S99, 81V45
| [
{
"version": "v1",
"created": "Sat, 25 Feb 1995 23:46:33 GMT"
}
] | 2008-02-03T00:00:00 | [
[
"Kisil",
"Vladimir V.",
"",
"CINVESTAV del IPN, Mexico, and Odessa State\n University, Ukraine"
]
] |
quant-ph/9502023 | null | O.V.Man'ko | Quantum Oscillator with Kronig-Penney Excitation in Different Regimes of
Damping | 6 pages, LATEX, Contribution to NATO Workshop on Electrodynamics and
Chromodynamics, Edirne, September 1994 | null | null | null | quant-ph | null | There are discussed the exact solution of the time--dependent Schr\"{o}dinger
equation for a damped quantum oscillator subject to a periodical frequency
delta--kicks describing squeezed states which are expressed in terms of
Chebyshev polynomials. The cases of strong and weak damping are investigated in
the frame of Caldirola--Kanai model.
| [
{
"version": "v1",
"created": "Mon, 27 Feb 1995 14:09:52 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Man'ko",
"O. V.",
""
]
] |
quant-ph/9502024 | null | V. I. Man'ko | Deformation of Partical Distribution Functions due to Q-nonlinearity and
Nonstationary Casimir Effect | 5 pages, LATEX | null | null | Naples University Preprint INFN-IV-52/94, DSF-T-52/94 | quant-ph | null | The geometrical phase is shown to be integral of motion. Deformation of
particle distribution function corresponding to nonstationary Casimir effect is
expressed in terms of multivariable Hermite polynomials. Correction to Planck
distribution due to q--nonlinearity is discussed.
| [
{
"version": "v1",
"created": "Mon, 27 Feb 1995 14:32:21 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Man'ko",
"V. I.",
""
]
] |
quant-ph/9502025 | null | V. I. Man'ko | Husimi Parametric Oscillator in Frame of Symplectic Group and
Q-oscillators | 6 pages, LATEX | null | null | Naples University Preprint INFN-IV-53/94, DSF-T-53/94 | quant-ph | null | Time--dependent integrals of motion which are linear forms in position and
momentum are discussed for Husimi parametric forced oscillator. Generalization
of these integrals of motion for q--oscillator is presented. Squeezing and
quadrature correlation phenomena are discussed on the base of Schr\"odinger
uncertainty relation. The properties of the generalized correlated states,
squeezed states, even and odd coherent states (the Schr\"odinger cat states)
are reviewed. The relation of the constructed nonclassical states to
representations of the symplectic symmetry group and finite symmetry groups is
discussed.
| [
{
"version": "v1",
"created": "Mon, 27 Feb 1995 14:43:08 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Man'ko",
"V. I.",
""
]
] |
quant-ph/9502026 | null | V. I. Man'ko | Photon Statistics for MUltimode Squeezed Schr\"odinger Cat States | 14 pages,LATEX | null | null | Naples University Preprint INFN-IV-51/94, DSF-T-51/94 | quant-ph | null | Particle distributions in squeezed states, even and odd coherent states are
given in terms of multivariable Hermite polynomials. The Q--function and Wigner
function for nonclassical field states are discussed.
| [
{
"version": "v1",
"created": "Mon, 27 Feb 1995 14:46:16 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Man'ko",
"V. I.",
""
]
] |
quant-ph/9502027 | Hagen Kleinert | H. Kleinert and I. Mustapic (Institut f\"ur Theoretische Physik Freie
Universit\"at Berlin) | Decay Rates of Metastable States in Cubic Potential by Variational
Perturbation Theory | null | Int.J.Mod.Phys.A11:4383-4400,1996 | 10.1142/S0217751X96002029 | null | quant-ph | null | Variational perturbation theory is used to determine the decay rates of
metastable states across a cubic barrier of arbitrary height. For high
barriers, a variational resummation procedure is applied to the complex energy
eigenvalues obtained from a WKB expansion; for low barriers, the variational
resummation procedure converts the non-Borel-summable
Rayleigh-Schr\"o\-din\-ger expansion into an exponentially fast convergent one.
The results in the two regimes match and yield very accurate imaginary parts of
the energy eigenvalues. This is demonstrated by comparison with the complex
eigenvalues from solutions of the Schr\"odinger equation via the
complex-coordinate rotation method.
| [
{
"version": "v1",
"created": "Tue, 28 Feb 1995 07:51:23 GMT"
}
] | 2016-08-15T00:00:00 | [
[
"Kleinert",
"H.",
"",
"Institut für Theoretische Physik Freie\n Universität Berlin"
],
[
"Mustapic",
"I.",
"",
"Institut für Theoretische Physik Freie\n Universität Berlin"
]
] |
quant-ph/9502028 | Krzysztof Wodkiewicz | K. Wodkiewicz | Classical and quantum Malus' law | pages, REVTEX, to be published in Phys. Rev A (April). | null | 10.1103/PhysRevA.51.2785 | null | quant-ph chem-ph cond-mat hep-th | null | The classical and the quantum Malus' Laws for light and spin are discussed.
It is shown that for spin-1/2, the quantum Malus' Law is equivalent in form to
the classical Malus' Law provided that the statistical average involves a
quasi-distribution function that can become negative. A generalization of
Malus' Law for arbitrary spin-s is obtained in the form of a Feynman
path-integral representation for the Malus amplitude. The classical limit of
the Malus amplitude for large s is discussed.
| [
{
"version": "v1",
"created": "Tue, 28 Feb 1995 16:22:00 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Wodkiewicz",
"K.",
""
]
] |
quant-ph/9502029 | Juan Pablo | W. H. Zurek and J. P. Paz | Quantum chaos: a decoherent definition. | uses jnl macro, 1 figure available upon request, to be published in
Physica D. | null | 10.1016/0167-2789(94)00271-Q | null | quant-ph | null | We show that the rate of increase of von Neumann entropy computed from the
reduced density matrix of an open quantum system is an excellent indicator of
the dynamical behavior of its classical hamiltonian counterpart. In decohering
quantum analogs of systems which exhibit classical hamiltonian chaos entropy
production rate quickly tends to a constant which is given by the sum of the
positive Lyapunov exponents, and falls off only as the system approaches
equilibrium. By contrast, integrable systems tend to have entropy production
rate which decreases as $t^{-1}$ well before equilibrium is attained. Thus,
behavior of quantum systems in contact with the environment can be used as a
test to determine the nature of their hamiltonian evolution.
| [
{
"version": "v1",
"created": "Tue, 28 Feb 1995 21:27:06 GMT"
}
] | 2015-06-26T00:00:00 | [
[
"Zurek",
"W. H.",
""
],
[
"Paz",
"J. P.",
""
]
] |
quant-ph/9503001 | null | Roberto Onofrio, Giovanni Carugno | Detecting Casimir Forces through a Tunneling Electromechanical
Transducer | 10 pages, revtex, 4 figures (not included) | Phys. Lett. A198 (1995) 365 | 10.1016/0375-9601(95)00073-C | DFPD 95/GP/64 | quant-ph | null | We propose the use of a tunneling electromechanical transducer to dynamically
detect Casimir forces between two conducting surfaces. The maximum distance for
which Casimir forces should be detectable with our method is around $1 \mu$m,
while the lower limit is given by the ability to approach the surfaces. This
technique should permit to study gravitational forces on the same range of
distances, as well as the vacuum friction provided that very low dissipation
mechanical resonators are used.
| [
{
"version": "v1",
"created": "Wed, 1 Mar 1995 16:23:43 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Onofrio",
"Roberto",
""
],
[
"Carugno",
"Giovanni",
""
]
] |
quant-ph/9503002 | Luanne Neumann | Takahiro Kawai and Henry P. Stapp | Quantum Electrodynamics at Large Distances I: Extracting the
Correspondence-Principle Part. | 55 pages, 3 Figures included as uuencoded, gzipped, tarred
encapsulated postscript files, uses math_macros.tex | Phys.Rev. D52 (1995) 2484-2504 | 10.1103/PhysRevD.52.2484 | LBL-35971 | quant-ph | null | The correspondence principle is important in quantum theory on both the
fundamental and practical levels: it is needed to connect theory to experiment,
and for calculations in the technologically important domain lying between the
atomic and classical regimes. Moreover, a correspondence-principle part of the
S-matrix is normally separated out in quantum electrodynamics in order to
obtain a remainder that can be treated perturbatively. But this separation, as
usually performed, causes an apparent breakdown of the correspondence principle
and the associated pole-factorization property. This breakdown is spurious. It
is shown in this article, and a companion, in the context of a special case,
how to extract a distinguished part of the S-matrix that meets the
correspondence-principle and pole-factorization requirements. In a second
companion paper the terms of the remainder are shown to vanish in the
appropriate macroscopic limits. Thus this work validates the correspondence
principle and pole factorization in quantum electrodynamics, in the special
case treated here, and creates a needed computational technique.
| [
{
"version": "v1",
"created": "Wed, 1 Mar 1995 18:43:29 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Kawai",
"Takahiro",
""
],
[
"Stapp",
"Henry P.",
""
]
] |
quant-ph/9503003 | null | Lajos Diosi | Comment on 'Quantum Backreaction on "Classical" Variables' | 3 pages, LaTex | Phys.Rev.Lett. 76 (1996) 4088 | 10.1103/PhysRevLett.76.4088 | null | quant-ph | null | It is argued that the bracket of Anderson's canonical theory should have been
antisymmetric otherwise serious controversies arise like violation of both
hermiticity and the Leibniz rule of differentiation.
| [
{
"version": "v1",
"created": "Thu, 2 Mar 1995 10:58:00 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Diosi",
"Lajos",
""
]
] |
quant-ph/9503004 | Hagen Kleinert | H. Kleinert and S.V. Shabanov (Freie Universit\"at Berlin) | Quantum Langevin equation from forward--backward path integral | null | Phys.Lett. A200 (1995) 224-232 | 10.1016/0375-9601(95)00169-4 | null | quant-ph cond-mat hep-th | null | The quantum Langevin equation is derived from the Feynman-Veron
forward--backward path integral representation for a density matrix of a
quantum system in a thermal oscillator bath. We exhibit the mechanism by which
the classical, $c$-valued noise in the Feynman-Vernon theory turns into an
operator-valued quantum noise fulfilling characteristic commutation relation
necessary for the unitarity of the time evolution in the quantum Langevin
equation.
| [
{
"version": "v1",
"created": "Thu, 2 Mar 1995 10:27:09 GMT"
}
] | 2016-08-15T00:00:00 | [
[
"Kleinert",
"H.",
"",
"Freie Universität Berlin"
],
[
"Shabanov",
"S. V.",
"",
"Freie Universität Berlin"
]
] |
quant-ph/9503005 | Hoi Fung Chau | H. F. Chau and F. Wilczek (IAS, Princeton) | Simple Realization Of The Fredkin Gate Using A Series Of Two-body
Operators | Revtex 3.0, 7 pages, 3 figures appended at the end, please refer to
the comment lines at the beginning of the manuscript for reasons of
replacement | null | 10.1103/PhysRevLett.75.748 | IASSNS-HEP-95/15 | quant-ph cond-mat | null | The Fredkin three-bit gate is universal for computational logic, and is
reversible. Classically, it is impossible to do universal computation using
reversible two-bit gates only. Here we construct the Fredkin gate using a
combination of six two-body reversible (quantum) operators.
| [
{
"version": "v1",
"created": "Mon, 6 Mar 1995 18:30:30 GMT"
},
{
"version": "v2",
"created": "Wed, 8 Mar 1995 16:18:00 GMT"
},
{
"version": "v3",
"created": "Thu, 9 Mar 1995 21:12:04 GMT"
},
{
"version": "v4",
"created": "Thu, 1 Jun 1995 19:42:04 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Chau",
"H. F.",
"",
"IAS, Princeton"
],
[
"Wilczek",
"F.",
"",
"IAS, Princeton"
]
] |
quant-ph/9503006 | Ulf Jasper | Juergen Audretsch, Ulf Jasper and Vladimir D. Skarzhinsky | A pragmatic approach to the problem of the self-adjoint extension of
Hamilton operators with the Aharonov-Bohm potential | 8 pages, LaTeX, to appear in J. Phys. A | J.Phys. A28 (1995) 2359-2368 | 10.1088/0305-4470/28/8/026 | KONS-RGKU-95-2 | quant-ph | null | We consider the problem of self-adjoint extension of Hamilton operators for
charged quantum particles in the pure Aharonov-Bohm potential (infinitely thin
solenoid). We present a pragmatic approach to the problem based on the
orthogonalization of the radial solutions for different quantum numbers. Then
we discuss a model of a scalar particle with a magnetic moment which allows to
explain why the self-adjoint extension contains arbitrary parameters and give a
physical interpretation.
| [
{
"version": "v1",
"created": "Tue, 7 Mar 1995 12:26:33 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Audretsch",
"Juergen",
""
],
[
"Jasper",
"Ulf",
""
],
[
"Skarzhinsky",
"Vladimir D.",
""
]
] |
quant-ph/9503007 | Raymond LaFlamme | I. Chuang, Raymond Laflamme, P. Shor, W. Zurek | Quantum Computers, Factoring, and Decoherence | 7 pages,LaTex + 2 postcript figures in a uuencoded file | null | 10.1126/science.270.5242.1633 | LA-UR-95-241 | quant-ph | null | In a quantum computer any superposition of inputs evolves unitarily into the
corresponding superposition of outputs. It has been recently demonstrated that
such computers can dramatically speed up the task of finding factors of large
numbers -- a problem of great practical significance because of its
cryptographic applications. Instead of the nearly exponential ($\sim \exp
L^{1/3}$, for a number with $L$ digits) time required by the fastest classical
algorithm, the quantum algorithm gives factors in a time polynomial in $L$
($\sim L^2$). This enormous speed-up is possible in principle because quantum
computation can simultaneously follow all of the paths corresponding to the
distinct classical inputs, obtaining the solution as a result of coherent
quantum interference between the alternatives. Hence, a quantum computer is
sophisticated interference device, and it is essential for its quantum state to
remain coherent in the course of the operation. In this report we investigate
the effect of decoherence on the quantum factorization algorithm and establish
an upper bound on a ``quantum factorizable'' $L$ based on the decoherence
suffered per operational step.
| [
{
"version": "v1",
"created": "Wed, 8 Mar 1995 16:39:04 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Chuang",
"I.",
""
],
[
"Laflamme",
"Raymond",
""
],
[
"Shor",
"P.",
""
],
[
"Zurek",
"W.",
""
]
] |
quant-ph/9503008 | Jonathan Halliwell | Jonathan Halliwell and Andreas Zoupas | Quantum State Diffusion, Density Matrix Diagonalization and Decoherent
Histories: A Model | 32 pages, plain Tex. | Phys.Rev.D52:7294-7307,1995 | 10.1103/PhysRevD.52.7294 | Imperial College preprint 94-95/24 | quant-ph gr-qc | null | We analyse the quantum evolution of a particle moving in a potential in
interaction with an environment of harmonic oscillators in a thermal state,
using the quantum state diffusion (QSD) picture of Gisin and Percival, in which
one associates the usual Markovian master equation for the density operator
with a class of stochastic non-linear Schr\"odinger equations. We find
stationary solutions to the Ito equation which are Gaussians, localized around
a point in phase space undergoing classical Brownian motion. We show that every
initial state approaches these stationary solutions in the long time limit. We
recover the density operator corresponding to these solutions, and thus show,
for this particular model, that the QSD picture effectively supplies a
prescription for approximately diagonalizing the density operator in a basis of
phase space localized states. The rate of localization is related to the
decoherence time, and also to the timescale on which thermal and quantum
fluctuations become comparable. We use these results to exemplify the general
connection between the QSD picture and the decoherent histories approach.
| [
{
"version": "v1",
"created": "Wed, 8 Mar 1995 19:56:17 GMT"
}
] | 2011-07-19T00:00:00 | [
[
"Halliwell",
"Jonathan",
""
],
[
"Zoupas",
"Andreas",
""
]
] |
quant-ph/9503009 | Frank Dodd Smith | Frank D. Smith, Jr | Standard Model plus Gravity from Octonion Creators and Annihilators | 21 pages, latex, see http://www.gatech.edu/tsmith/home.html | null | null | THEP-95-2 | quant-ph | null | Octonion creation and annihilation operators are used to construct the
Standard Model plus Gravity. The resulting phenomenological model is the
D4-D5-E6 model described in hep-ph/9501252 .
| [
{
"version": "v1",
"created": "Sun, 12 Mar 1995 17:54:52 GMT"
}
] | 2012-08-27T00:00:00 | [
[
"Smith,",
"Frank D.",
"Jr"
]
] |
quant-ph/9503010 | Svozil Karl | Kurt Krenn and Karl Svozil | Stronger-than-quantum correlations | latex | Found.Phys.28:971-984,1998 | 10.1023/A:1018821314465 | null | quant-ph | null | After an elementary derivation of Bell's inequality, several forms of
expectation functions for two-valued observables are discussed. Special
emphasis is given to hypothetical stronger-than quantum expectation functions
which give rise to a maximal violation of Bell's inequality.
| [
{
"version": "v1",
"created": "Mon, 13 Mar 1995 11:22:25 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Krenn",
"Kurt",
""
],
[
"Svozil",
"Karl",
""
]
] |
quant-ph/9503011 | Default Account | V.P.Karassiov (Lebedev Physical Institute, Moscow) | Polarization Structure of Quantum Light Fields: A New Insight. 2:
Generalized Coherent States, Squeezing and Geometric Phases | 22 pages, LATEX | null | null | FIAN-OD-95-03 | quant-ph | null | Within the new description of the polarization structure of quantum light
(given in Part I) some types of generalized coherent states related to the
polarization SU(2) group are examined. With their help we give a quasiclassical
description of polarization properties of light fields and discuss the concept
of squeezing and uncertainty relations for multimode light in the polarization
quantum optics. As a consequence, a new classification of polarization states
of quantum light is obtained. We also derive geometric phases acquired by
different quantum light beams transmitted through "polarization rotators".
| [
{
"version": "v1",
"created": "Mon, 13 Mar 1995 11:57:40 GMT"
},
{
"version": "v2",
"created": "Tue, 14 Mar 1995 11:04:03 GMT"
},
{
"version": "v3",
"created": "Wed, 15 Mar 1995 14:08:03 GMT"
}
] | 2008-02-03T00:00:00 | [
[
"Karassiov",
"V. P.",
"",
"Lebedev Physical Institute, Moscow"
]
] |
quant-ph/9503012 | Rainer Mueller | Juergen Audretsch, Rainer Mueller, and Markus Holzmann | Relation between energy shifts and relaxation rates for a small system
coupled to a reservoir | 6 pages, Latex, to appear in Phys. Lett. A | null | 10.1016/0375-9601(95)00125-M | KONS-RGKU-95-01 | quant-ph gr-qc hep-th | null | For a small system the coupling to a reservoir causes energy shifts as well
as transitions between the system's energy levels. We show for a general
stationary situation that the energy shifts can essentially be reduced to the
relaxation rates. The effects of reservoir fluctuations and self reaction are
treated separately. We apply the results to a two-level atom coupled to a
reservoir which may be the vacuum of a radiation field.
| [
{
"version": "v1",
"created": "Mon, 13 Mar 1995 15:03:46 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Audretsch",
"Juergen",
""
],
[
"Mueller",
"Rainer",
""
],
[
"Holzmann",
"Markus",
""
]
] |
quant-ph/9503013 | K. Berndl | K. Berndl, D. D\"urr (LMU Munich), S. Goldstein (Rutgers), G. Peruzzi
(Florence), and N. Zangh\`{\i} (Genova) | On the Global Existence of Bohmian Mechanics | 35 pages, LaTex | Commun.Math.Phys. 173 (1995) 647-674 | 10.1007/BF02101660 | gk-mp-9408/8 (To appear in Comm. Math. Phys.) | quant-ph | null | We show that the particle motion in Bohmian mechanics, given by the solution
of an ordinary differential equation, exists globally: For a large class of
potentials the singularities of the velocity field and infinity will not be
reached in finite time for typical initial values. A substantial part of the
analysis is based on the probabilistic significance of the quantum flux. We
elucidate the connection between the conditions necessary for global existence
and the self-adjointness of the Schr\"odinger Hamiltonian.
| [
{
"version": "v1",
"created": "Thu, 9 Mar 1995 17:58:58 GMT"
}
] | 2016-08-15T00:00:00 | [
[
"Berndl",
"K.",
"",
"LMU Munich"
],
[
"Dürr",
"D.",
"",
"LMU Munich"
],
[
"Goldstein",
"S.",
"",
"Rutgers"
],
[
"Peruzzi",
"G.",
"",
"Florence"
],
[
"Zangh\\`ı",
"N.",
"",
"Genova"
]
] |
quant-ph/9503014 | null | Anu Venugopalan and R. Ghosh | Decoherence and the Quantum Zeno Effect | Based on a poster presented at the "Workshop on Advanced Laser
Spectroscopy", I.I.T. Kanpur, India, 25-28 February 1995. RevTeX, one page,
two uunecoded post-script figures appended. | null | 10.1016/0375-9601(95)00443-7 | none | quant-ph | null | The experiment of Etano et al which demonstrated the quantum Zeno effect
(QZE) in an optical experiment was explained by Frerichs and Schenzle without
invoking the wave function collapse. In this report it is proposed that the
collapse does occur, and it can be explained by the `environment induced
decoherence' theory. The environment here consists of the completely quantized
field vacuum modes. The spontaneous emission life time of the atom sets a
fundamental limit on the requirement of `continuous measurements' for QZE. This
limit turns out to be related to the time-energy uncertainty relation discussed
by Ghirardi et al.
| [
{
"version": "v1",
"created": "Tue, 21 Mar 1995 04:51:39 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Venugopalan",
"Anu",
""
],
[
"Ghosh",
"R.",
""
]
] |
quant-ph/9503015 | Frank Dodd Smith | Frank D. Smith, Jr | HyperDiamond Feynman Checkerboard in 4-dimensional Spacetime | 38 pages, latex, see http://www.gatech.edu/tsmith/home.html | null | null | THEP-95-3 | quant-ph | null | A generalized Feynman Checkerboard model is constructed using a 4-dimensional
HyperDiamond lattice. The resulting phenomenological model is the D4-D5-E6
model described in hep-ph/9501252 and quant-ph/9503009.
| [
{
"version": "v1",
"created": "Tue, 21 Mar 1995 15:25:23 GMT"
}
] | 2012-08-27T00:00:00 | [
[
"Smith,",
"Frank D.",
"Jr"
]
] |
quant-ph/9503016 | null | A. Barenco (Oxford), C. H. Bennett (IBM), R. Cleve (Calgary), D. P.
DiVincenzo (IBM), N. Margolus (MIT), P. Shor (AT&T), T. Sleator (NYU), J.
Smolin (UCLA) and H. Weinfurter (Innsbruck) | Elementary gates for quantum computation | 31 pages, plain latex, no separate figures, submitted to Phys. Rev.
A. Related information on http://vesta.physics.ucla.edu:7777/ | Phys.Rev. A52 (1995) 3457 | 10.1103/PhysRevA.52.3457 | null | quant-ph cond-mat hep-th | null | We show that a set of gates that consists of all one-bit quantum gates (U(2))
and the two-bit exclusive-or gate (that maps Boolean values $(x,y)$ to $(x,x
\oplus y)$) is universal in the sense that all unitary operations on
arbitrarily many bits $n$ (U($2^n$)) can be expressed as compositions of these
gates. We investigate the number of the above gates required to implement other
gates, such as generalized Deutsch-Toffoli gates, that apply a specific U(2)
transformation to one input bit if and only if the logical AND of all remaining
input bits is satisfied. These gates play a central role in many proposed
constructions of quantum computational networks. We derive upper and lower
bounds on the exact number of elementary gates required to build up a variety
of two-and three-bit quantum gates, the asymptotic number required for $n$-bit
Deutsch-Toffoli gates, and make some observations about the number required for
arbitrary $n$-bit unitary operations.
| [
{
"version": "v1",
"created": "Thu, 23 Mar 1995 15:16:16 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Barenco",
"A.",
"",
"Oxford"
],
[
"Bennett",
"C. H.",
"",
"IBM"
],
[
"Cleve",
"R.",
"",
"Calgary"
],
[
"DiVincenzo",
"D. P.",
"",
"IBM"
],
[
"Margolus",
"N.",
"",
"MIT"
],
[
"Shor",
"P.",
"",
"AT&T"
],
[
"Sleator",
"T.",
"",
"NYU"
],
[
"Smolin",
"J.",
"",
"UCLA"
],
[
"Weinfurter",
"H.",
"",
"Innsbruck"
]
] |
quant-ph/9503017 | Adriano Barenco | A. Barenco, D. Deutsch, A.Ekert and R. Jozsa | Conditional Quantum Dynamics and Logic Gates | 5 pages, RevTeX, two figures in a uuencoded, compressed file | Phys.Rev.Lett. 74 (1995) 4083-4086 | 10.1103/PhysRevLett.74.4083 | null | quant-ph | null | Quantum logic gates provide fundamental examples of conditional quantum
dynamics. They could form the building blocks of general quantum information
processing systems which have recently been shown to have many interesting
non--classical properties. We describe a simple quantum logic gate, the quantum
controlled--NOT, and analyse some of its applications. We discuss two possible
physical realisations of the gate; one based on Ramsey atomic interferometry
and the other on the selective driving of optical resonances of two subsystems
undergoing a dipole--dipole interaction.
| [
{
"version": "v1",
"created": "Fri, 24 Mar 1995 19:08:17 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Barenco",
"A.",
""
],
[
"Deutsch",
"D.",
""
],
[
"Ekert",
"A.",
""
],
[
"Jozsa",
"R.",
""
]
] |
quant-ph/9503018 | null | B. Kaulakys (Institute of Theoretical Physics and Astronomy,
Lithuania) | ON THE QUANTUM EVOLUTION OF CHAOTIC SYSTEMS AFFECTED BY REPEATED
FREQUENT MEASUREMENT | 4 pages, LaTEX, no figures, to be published in Quantum Communication
and Measurement, Ed. by V. P. Belavkin, et all. Plenum Pbl., 1995, 196-200
The article is replaced because of LaTEX bugs. | null | null | null | quant-ph | null | We investigate the effect of repeated measurement for quantum dynamics of the
suppressed systems which classical counterparts exhibit chaos. The essential
feature of such systems is the quantum localization phenomena strongly limiting
motion in the energy space. Repeated frequent measurement of suppressed systems
results to the delocalization. Time evolution of the observed chaotic systems
becomes close to the classical frequently broken diffusion-like process
described by rate equations for the probabilities rather than for amplitudes.
| [
{
"version": "v1",
"created": "Mon, 27 Mar 1995 12:04:29 GMT"
},
{
"version": "v2",
"created": "Mon, 3 Apr 1995 12:42:17 GMT"
}
] | 2008-02-03T00:00:00 | [
[
"Kaulakys",
"B.",
"",
"Institute of Theoretical Physics and Astronomy,\n Lithuania"
]
] |
quant-ph/9503019 | null | Philip Pearle and Euan Squires | Gravity, energy conservation and parameter values in collapse models | 15 pages, no figs. tex. | null | 10.1007/BF02069474 | null | quant-ph | null | We interpret the probability rule of the CSL collapse theory to mean that the
scalar field which causes collapse is the grvitational curvature scalar with
two sources, the expectation value of the mass density and a white noise
fluctuating source. We examine two models of the fluctuating source, monopole
fluctuations and dipole fluctuations, and show that these correspond to two
well known collapse models. We relate the two GRW parameters of CSL to
fundamental constants, and explain the energy increase as arising from the loss
of vacuum gravitational energy. It is shown how a problem with semi-classical
grvity may be cured when it is combined with a CSL collapse model.
| [
{
"version": "v1",
"created": "Mon, 27 Mar 1995 14:26:34 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Pearle",
"Philip",
""
],
[
"Squires",
"Euan",
""
]
] |
quant-ph/9503020 | Olavo Leopoldino Da Silva Filho | L.S.F. Olavo | Quantum Mechanics as a Classical Theory I: Non-relativistic Theory | Same contents as the previously submitted paper but written in
standard LaTex style. Submitted to Rev. Mod. Phys. 24 pages. | null | null | null | quant-ph | null | The objective of this series of three papers is to axiomatically derive
quantum mechanics from classical mechanics and two other basic axioms. In this
first paper, Schreodinger's equation for the density matrix is fist obtained
and from it Schroedinger's equation for the wave functions is derived. The
momentum and position operators acting upon the density matrix are defined and
it is then demonstrated that they commute. Pauli's equation for the density
matrix is also obtained. A statistical potential formally identical to the
quantum potential of Bohm's hidden variable theory is introduced, and this
quantum potential is reinterpreted through the formalism here proposed. It is
shown that, for dispersion free {\it ensembles% }, Schroedinger's equation for
the density matrix is equivalent to Newton's equations. A general non-ambiguous
procedure for the construction of operators which act upon the density matrix
is presented. It is also shown how these operators can be reduced to those
which act upon the wave functions.
| [
{
"version": "v1",
"created": "Tue, 28 Mar 1995 13:43:47 GMT"
},
{
"version": "v2",
"created": "Fri, 31 Mar 1995 17:32:37 GMT"
},
{
"version": "v3",
"created": "Sat, 1 Apr 1995 20:00:15 GMT"
}
] | 2008-02-03T00:00:00 | [
[
"Olavo",
"L. S. F.",
""
]
] |
quant-ph/9503021 | Olavo Leopoldino Da Silva Filho | L.S.F. Olavo | Quantum Mechanics as a Classical Theory II: Relativistic Theory | Same contents as the previously submitted paper but written in
standard LaTex style. Submitted to Rev. Mod. Phys. 12 pages. | null | null | null | quant-ph | null | In this article, the axioms presented in the first one are reformulated
according to the special theory of relativity. Using these axioms, quantum
mechanic's relativistic equations are obtained in the presence of
electromagnetic fields for both the density function and the probability
amplitude. It is shown that, within the present theory's scope, Dirac's second
order equation should be considered the fundamental one in spite of the first
order equation. A relativistic expression is obtained for the statistical
potential. Axioms are again altered and made compatible with the general theory
of relativity. These postulates, together with the idea of the statistical
potential, allow us to obtain a general relativistic quantum theory for {\it
ensembles} composed of single particle systems.
| [
{
"version": "v1",
"created": "Tue, 28 Mar 1995 13:44:42 GMT"
},
{
"version": "v2",
"created": "Fri, 31 Mar 1995 17:33:13 GMT"
}
] | 2008-02-03T00:00:00 | [
[
"Olavo",
"L. S. F.",
""
]
] |
quant-ph/9503022 | Olavo Leopoldino Da Silva Filho | L.S.F. Olavo | Quantum Mechanics as a Classical Theory III: Epistemology | Same contents as the previously submitted paper but written in
standard LaTex style. Submitted to Rev. Mod. Phys. 16 pages. | null | null | null | quant-ph | null | The two previous papers developed quantum mechanical formalism from classical
mechanics and two additional postulates. In the first paper it was also shown
that the uncertainty relations possess no ontological validity and only reflect
the formalism's limitations. In this paper, a Realist Interpretation of quantum
mechanics based on these results is elaborated and compared to the Copenhagen
Interpretation. We demonstrate that von Neumann's proof of the impossibility of
a hidden variable theory is not correct, independently of Bell's argumentation.
A local hidden variable theory is found for non-relativistic quantum mechanics,
which is nothing else than newtonian mechanics itself. We prove that Bell's
theorem does not imply in a non-locality of quantum mechanics, and also
demonstrate that Bohm's theory cannot be considered a true hidden variable
theory.
| [
{
"version": "v1",
"created": "Tue, 28 Mar 1995 13:45:43 GMT"
},
{
"version": "v2",
"created": "Fri, 31 Mar 1995 17:34:12 GMT"
}
] | 2008-02-03T00:00:00 | [
[
"Olavo",
"L. S. F.",
""
]
] |
quant-ph/9503023 | null | Lajos Diosi | Quantum dynamics with two Planck constants and the semiclassical limit | 9 pages, LaTex | null | null | null | quant-ph | null | The mathematical possibility of coupling two quantum dynamic systems having
two different Planck constants, respectively, is investigated. It turns out
that such canonical dynamics are always irreversible. Semiclassical dynamics is
obtained by letting one of the two Planck constants go to zero. This
semiclassical dynamics will preserve positivity, as expected, so an improvement
of the earlier proposals by Aleksandrov and by Boucher and Traschen is
achieved. Coupling of quantized matter to gravity is illustrated by a
simplistic example.
| [
{
"version": "v1",
"created": "Tue, 28 Mar 1995 15:51:00 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Diosi",
"Lajos",
""
]
] |
quant-ph/9503024 | Olavo Leopoldino Da Silva Filho | L.S.F. Olavo | Quantum Mechanics as a Classical Theory IV: The Negative Mass Conjecture | Same contents as the previously submitted paper byt written in
standard LaTex style. 21 pages. | null | null | null | quant-ph | null | The following two papers form a natural development of a previous series of
three articles on the foundations of quantum mechanics; they are intended to
take the theory there developed to its utmost logical and epistemological
consequences. We show in the first paper that relativistic quantum mechanics
might accommodate without ambiguities the notion of negative masses. To achieve
this, we rewrite all of its formalism for integer and half integer spin
particles and present the world revealed by this conjecture. We also base the
theory on the second order Klein-Gordon's and Dirac's equations and show that
they can be stated with only positive definite energies. In the second paper we
show that the general relativistic quantum mechanics derived in paper II of
this series supports this conjecture.
| [
{
"version": "v1",
"created": "Tue, 28 Mar 1995 14:19:18 GMT"
},
{
"version": "v2",
"created": "Fri, 31 Mar 1995 17:35:08 GMT"
}
] | 2008-02-03T00:00:00 | [
[
"Olavo",
"L. S. F.",
""
]
] |
quant-ph/9503025 | Olavo Leopoldino Da Silva Filho | L.S.F. Olavo | Quantum Mechanics as a Classical Theory V: The Quantum Schwartzchild
Problem | Same contents as the previously submitted paper but written in
standard LaTex style. 14 pages. | null | null | null | quant-ph | null | In this continuation paper, we apply the general relativistic quantum theory
for one particle systems, derived in paper II of this series, to a simple
problem: the quantum Schwartzchild problem, where one particle of mass {\it m%
} gravitates around a massive body. The results thus obtained reveal that, in
the realm of such a theory, the negative mass conjecture we made in paper IV of
this series is, indeed, adequate. It is shown that gravitation is responsible
for the loss of energy quantization. We relate this property with the ideas of
irreversibility and time arrow.
| [
{
"version": "v1",
"created": "Tue, 28 Mar 1995 14:19:41 GMT"
},
{
"version": "v2",
"created": "Fri, 31 Mar 1995 17:35:40 GMT"
}
] | 2008-02-03T00:00:00 | [
[
"Olavo",
"L. S. F.",
""
]
] |
quant-ph/9503026 | null | Salvatore De Martino, Silvio De Siena, and Fabrizio Illuminati | DYNAMICS OF SQUEEZING FROM GEMERALIZED COHERENT STATES | 14 pages, plain LaTeX, no figures | null | null | DFPD 95/TH/11 and DFSA 95/TH/5, March 1995 | quant-ph cond-mat | null | We extend the definition of generalized coherent states to include the case
of time-dependent dispersion. We introduce a suitable operator providing
displacement and dynamical rescaling from an arbitrary ground state. As a
consequence, squeezing is naturally embedded in this framework, and its
dynamics is ruled by the evolution equation for the dispersion. Our
construction provides a displacement-operator method to obtain the squeezed
states of arbitrary systems.
| [
{
"version": "v1",
"created": "Tue, 28 Mar 1995 18:32:24 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"De Martino",
"Salvatore",
""
],
[
"De Siena",
"Silvio",
""
],
[
"Illuminati",
"Fabrizio",
""
]
] |
quant-ph/9503027 | null | Joachim Ankerhold, Hermann Grabert, and Gert-Ludwig Ingold
(Universit"at Freiburg and Universit"at Augsburg, Germany) | Dissipative Quantum Systems with Potential Barrier. General Theory and
Parabolic Barrier | 29 pages + 1 figure as compressed ps-file (uufiles) to appear in
Phys. Rev. E | Phys.Rev. E51 (1995) 4267-4281 | 10.1103/PhysRevE.51.4267 | null | quant-ph cond-mat nucl-th | null | We study the real time dynamics of a quantum system with potential barrier
coupled to a heat-bath environment. Employing the path integral approach an
evolution equation for the time dependent density matrix is derived. The time
evolution is evaluated explicitly near the barrier top in the temperature
region where quantum effects become important. It is shown that there exists a
quasi-stationary state with a constant flux across the potential barrier. This
state generalizes the Kramers flux solution of the classical Fokker-Planck
equation to the quantum regime. In the temperature range explored the quantum
flux state depends only on the parabolic approximation of the anharmonic
barrier potential near the top. The parameter range within which the solution
is valid is investigated in detail. In particular, by matching the flux state
onto the equilibrium state on one side of the barrier we gain a condition on
the minimal damping strength. For very high temperatures this condition reduces
to a known result from classical rate theory. Within the specified parameter
range the decay rate out of a metastable state is calculated from the flux
solution. The rate is shown to coincide with the result of purely thermodynamic
methods. The real time approach presented can be extended to lower temperatures
and smaller damping.
| [
{
"version": "v1",
"created": "Fri, 31 Mar 1995 16:25:34 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Ankerhold",
"Joachim",
"",
"Universit\"at Freiburg and Universit\"at Augsburg, Germany"
],
[
"Grabert",
"Hermann",
"",
"Universit\"at Freiburg and Universit\"at Augsburg, Germany"
],
[
"Ingold",
"Gert-Ludwig",
"",
"Universit\"at Freiburg and Universit\"at Augsburg, Germany"
]
] |
quant-ph/9504001 | null | Victor Tapia | Quantum mechanics of time-dependent systems. Construction of pure states | 13 pages, plain TEX, no figures | null | null | DFUDEC-95-03 | quant-ph | null | For time-dependent systems the wavefunction depends explicitly on time and it
is not a pure state of the Hamiltonian. We construct operators for which the
above wavefunction is a pure state. The method is based on the introduction of
conserved quantities $Q$ and the pure states are defined by ${\hat
Q}\psi=q\psi$. The conserved quantities are constructed using parametrised
mechanics and the Noether theorem.
| [
{
"version": "v1",
"created": "Mon, 3 Apr 1995 14:03:53 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Tapia",
"Victor",
""
]
] |
quant-ph/9504002 | Richard Hughes | Richard J. Hughes, D. M. Alde, P. Dyer, G. G. Luther, G. L. Morgan and
M. Schauer | Quantum Cryptography | 36 pages in compressed PostScript format, 10 PostScript figures
compressed tar file | null | 10.1080/00107519508222149 | LA-UR-95-806 | quant-ph | null | Quantum cryptography is a new method for secret communications offering the
ultimate security assurance of the inviolability of a Law of Nature. In this
paper we shall describe the theory of quantum cryptography, its potential
relevance and the development of a prototype system at Los Alamos, which
utilises the phenomenon of single-photon interference to perform quantum
cryptography over an optical fiber communications link.
| [
{
"version": "v1",
"created": "Tue, 4 Apr 1995 00:01:51 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Hughes",
"Richard J.",
""
],
[
"Alde",
"D. M.",
""
],
[
"Dyer",
"P.",
""
],
[
"Luther",
"G. G.",
""
],
[
"Morgan",
"G. L.",
""
],
[
"Schauer",
"M.",
""
]
] |
quant-ph/9504003 | Luanne Neumann | Henry P. Stapp | Quantum Mechanical Coherence, Resonance, and Mind | 36 pages, no figures, latexed, uses math_macros.tex (can get
math_macros.tex from e-print archive), full postscript available from
http://theor1.lbl.gov/www/theorgroup/papers/36915.ps | null | null | LBL-36815 | quant-ph | null | Norbert Wiener and J.B.S. Haldane suggested during the early thirties that
the profound changes in our conception of matter entailed by quantum theory
opens the way for our thoughts, and other experiential or mind-like qualities,
to play a role in nature that is causally interactive and effective, rather
than purely epiphenomenal, as required by classical mechanics. The mathematical
basis of this suggestion is described here, and it is then shown how, by giving
mind this efficacious role in natural process, the classical character of our
perceptions of the quantum universe can be seen to be a consequence of
evolutionary pressures for the survival of the species.
| [
{
"version": "v1",
"created": "Tue, 4 Apr 1995 16:09:44 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Stapp",
"Henry P.",
""
]
] |
quant-ph/9504004 | Hoi-Kwong Lo | Hoi-Kwong Lo | Quantum Coding Theorem for Mixed States | Overlap with some unpublished work noted. Limitation clarified. 11
pages, REVTEX, amsfonts | null | 10.1016/0030-4018(95)00406-X | IASSNS-HEP-95/23 | quant-ph hep-th | null | We prove a theorem for coding mixed-state quantum signals. For a class of
coding schemes, the von Neumann entropy $S$ of the density operator describing
an ensemble of mixed quantum signal states is shown to be equal to the number
of spin-$1/2$ systems necessary to represent the signal faithfully. This
generalizes previous works on coding pure quantum signal states and is
analogous to the Shannon's noiseless coding theorem of classical information
theory. We also discuss an example of a more general class of coding schemes
which {\em beat} the limit set by our theorem.
| [
{
"version": "v1",
"created": "Tue, 4 Apr 1995 20:40:25 GMT"
},
{
"version": "v2",
"created": "Wed, 19 Apr 1995 00:55:13 GMT"
}
] | 2015-06-26T00:00:00 | [
[
"Lo",
"Hoi-Kwong",
""
]
] |
quant-ph/9504005 | Arkadiusz Jadczyk | Ph. Blanchard and A. Jadczyk | Theory of Events | 12 pages, no figures, latex | null | null | BiBoS 683/4/95 | quant-ph cond-mat gr-qc hep-th | null | We review what we call "event-enhanced formalism" of quantum theory. In this
approach we explicitly assume classical nature of events. Given a quantum
system, that is coupled to a classical one by a suitable coupling, classical
events are being triggered. The trigerring process is partly random and partly
deterministic. Within this new approach one can modelize real experimental
events, including pointer readings of measuring devices. Our theory gives, for
the first time, a unique algorithm that can be used for computer generation of
experimental runs with individual quantum objects.
| [
{
"version": "v1",
"created": "Thu, 6 Apr 1995 10:00:34 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Blanchard",
"Ph.",
""
],
[
"Jadczyk",
"A.",
""
]
] |
quant-ph/9504006 | Asher Peres | Asher Peres | Higher order Schmidt decompositions | LaTeX 3 pages | Phys.Lett. A202 (1995) 16-17 | 10.1016/0375-9601(95)00315-T | null | quant-ph | null | Necessary and sufficient conditions are given for the existence of extended
Schmidt decompositions, with more than two subspaces.
| [
{
"version": "v1",
"created": "Fri, 7 Apr 1995 08:30:18 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Peres",
"Asher",
""
]
] |
quant-ph/9504007 | null | B. Kaulakys and G. Vilutis (Institute of Theoretical Physics and
Astronomy, Vilnius, Lithuania) | Rydberg Atoms Ionisation by Microwave Field and Electromagnetic Pulses | 4 pages, LaTEX, no figures, to be published in Resonance Ionization
Spectroscopy, AIP, 1995 | null | null | null | quant-ph | null | A simple theory of the Rydberg atoms ionisation by electromagnetic pulses and
microwave field is presented. The analysis is based on the scale transformation
which reduces the number of parameters and reveals the functional dependencies
of the processes. It is shown that the observed ionisation of Rydberg atoms by
subpicosecond electromagnetic pulses scale classically. The threshold electric
field required to ionise a Rydberg state may be simply evaluated in the
photonic basis approach for the quantum dynamics or from the multiphoton
ionisation theory.
| [
{
"version": "v1",
"created": "Mon, 10 Apr 1995 14:46:08 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Kaulakys",
"B.",
"",
"Institute of Theoretical Physics and\n Astronomy, Vilnius, Lithuania"
],
[
"Vilutis",
"G.",
"",
"Institute of Theoretical Physics and\n Astronomy, Vilnius, Lithuania"
]
] |
quant-ph/9504008 | Brif Constantin | C. Brif (Technion) | Photon states associated with Holstein-Primakoff realization of SU(1,1)
Lie algebra | 32 pages, no figures, REVTeX with amssymb, to be published in Quantum
and Semiclassical Optics | Quant.Semiclass.Opt.7:803-834,1995 | 10.1088/1355-5111/7/5/004 | null | quant-ph | null | Statistical and phase properties and number-phase uncertainty relations are
systematically investigated for photon states associated with the
Holstein-Primakoff realization of the SU(1,1) Lie algebra. Perelomov's SU(1,1)
coherent states and the eigenstates of the SU(1,1) lowering generator (the
Barut-Girardello states) are discussed. A recently developed formalism, based
on the antinormal ordering of exponential phase operators, is used for studying
phase properties and number-phase uncertainty relations. This study shows
essential differences between properties of the Barut-Girardello states and the
SU(1,1) coherent states. The philophase states, defined as states with simple
phase-state representations, relate the quantum description of the optical
phase to the properties of the SU(1,1) Lie group. A modified Holstein-Primakoff
realization is derived, and eigenstates of the corresponding lowering generator
are discussed. These states are shown to contract, in a proper limit, to the
familiar Glauber coherent states.
| [
{
"version": "v1",
"created": "Tue, 11 Apr 1995 15:03:49 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Brif",
"C.",
"",
"Technion"
]
] |
quant-ph/9504009 | Brif Constantin | Y. Ben-Aryeh and C. Brif (Technion) | Discrete photodetection and Susskind-Glogower ladder operators | 7 pages, no figures, REVTeX | null | null | null | quant-ph | null | We assert that state reduction processes in different types of photodetection
experiments are described by using different kinds of ladder operators. A
special model of discrete photodetection is developed by the use of
superoperators which are based on the Susskind-Glogower raising and lowering
operators.
| [
{
"version": "v1",
"created": "Wed, 12 Apr 1995 12:13:39 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Ben-Aryeh",
"Y.",
"",
"Technion"
],
[
"Brif",
"C.",
"",
"Technion"
]
] |
quant-ph/9504010 | K. Berndl | K. Berndl, M. Daumer, D. D\"urr (LMU Munich), S. Goldstein (Rutgers),
N. Zanghi (Genova) | A Survey on Bohmian Mechanics | 9 pages, Revtex, To appear in Il Nuovo Cimento | NuovoCim.B110:737-750,1995 | 10.1007/BF02741477 | null | quant-ph | null | Bohmian mechanics is the most naively obvious embedding imaginable of
Schr\"odinger's equation into a completely coherent physical theory. It
describes a world in which particles move in a highly non-Newtonian sort of
way, one which may at first appear to have little to do with the spectrum of
predictions of quantum mechanics. It turns out, however, that as a consequence
of the defining dynamical equations of Bohmian mechanics, when a system has
wave function $\psi$ its configuration is typically random, with probability
density $\rho$ given by $|\psi|^2$, the quantum equilibrium distribution. It
also turns out that the entire quantum formalism, operators as observables and
all the rest, is a consequence of Bohmian mechanics.
| [
{
"version": "v1",
"created": "Wed, 12 Apr 1995 11:12:05 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Berndl",
"K.",
"",
"LMU Munich"
],
[
"Daumer",
"M.",
"",
"LMU Munich"
],
[
"Dürr",
"D.",
"",
"LMU Munich"
],
[
"Goldstein",
"S.",
"",
"Rutgers"
],
[
"Zanghi",
"N.",
"",
"Genova"
]
] |
quant-ph/9504011 | Karol Grudzinski | Hubert Grudzinski (Institute of Physics, Nicholas Copernicus
University, Torun, Poland) | The N-representability problem, the pseudo-spectral decomposition of
antisymmetric 1-body operators, and collective behaviour | 28 pages, compressed and uuencoded Postscript, 2 figures | null | 10.1016/0034-4877(96)89765-5 | null | quant-ph supr-con | null | The pseudo--spectral decomposition of an $N$--particle antisymmetric 1--body
positive--semidefinite operator that corresponds to the canonical convex
decomposition into the extreme elements of the dual cone of the set of fermion
$N$--representable $1$--density operators has been derived. An attempt at
constucting a mathematical model for collective behaviour of a system of
$N$--fermions that originates from the pseudo--spectral decomposition is
presented.
| [
{
"version": "v1",
"created": "Sat, 15 Apr 1995 15:13:33 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Grudzinski",
"Hubert",
"",
"Institute of Physics, Nicholas Copernicus\n University, Torun, Poland"
]
] |
quant-ph/9504012 | Oleg Shvedov | O.Yu.Shvedov | LARGE ORDER ASYMPTOTICS OF SEMICLASSICAL EXPANSION: A NEW APPROACH | 24 pages, LaTeX, 4 figures can be obtained from the author, revised
russian version is submitted to Yadernaya Fizika | Yadernaya Fizika 59 (1996) 263-270 | null | null | quant-ph hep-ph hep-th | null | A new approach to the problem of finding the asymptotical behaviour of large
orders of semiclassical expansion is suggested. Asymptotics of high orders not
only for eigenvalues, but also for eigenfunctions, are constructed. Thus, one
can apply not only functional integral technique, which has been used up to
now, but also method of direct analysis of the semiclassical expansion
recursive relations.
| [
{
"version": "v1",
"created": "Mon, 17 Apr 1995 07:03:26 GMT"
}
] | 2009-09-25T00:00:00 | [
[
"Shvedov",
"O. Yu.",
""
]
] |
quant-ph/9504013 | Timo Weidl | Timo Weidl | On the Lieb-Thirring constants L_gamma,1 for gamma geq 1/2 | AMS-LATEX, 15 pages | Commun.Math.Phys. 178 (1996) 135-146 | 10.1007/BF02104912 | null | quant-ph funct-an math.FA | null | Let $E_i(H)$ denote the negative eigenvalues of the one-dimensional
Schr\"odinger operator $Hu:=-u^{\prime\prime}-Vu,\ V\geq 0,$ on $L_2({\Bbb
R})$. We prove the inequality \sum_i|E_i(H)|^\gamma\leq L_{\gamma,1}\int_{\Bbb
R} V^{\gamma+1/2}(x)dx, (1) for the "limit" case $\gamma=1/2.$ This will imply
improved estimates for the best constants $L_{\gamma,1}$ in (1), as
$1/2<\gamma<3/2.
| [
{
"version": "v1",
"created": "Mon, 17 Apr 1995 12:29:16 GMT"
}
] | 2016-09-08T00:00:00 | [
[
"Weidl",
"Timo",
""
]
] |
quant-ph/9504014 | Oleg Shvedov | O.Yu.Shvedov | ON THE LARGE ORDER ASYMPTOTICS OF THE WAVE FUNCTION PERTURBATION THEORY | 9 pages, LaTeX, 1 figure can be obtained from the author | Phys.Lett. B356 (1995) 56-60 | 10.1016/0370-2693(95)00814-2 | null | quant-ph hep-ph hep-th | null | The problem of finding the large order asymptotics for the eigenfunction
perturbation theory in quantum mechanics is studied. The relation between the
wave function argument x and the number of perturbation theory order k that
allows us to construct the asymptotics by saddle-point technique is found:
$x/k^{1/2}=const$, k is large. Classical euclidean solutions starting from the
classical vacuum play an important role in constructing such asymptotics. The
correspondence between the trajectory end and the parameter $x/k^{1/2}$ is
found. The obtained results can be applied to the calculation of the main
values of the observables depending on k in the k-th order of perturbation
theory at larges k and, probably, to the multiparticle production problem.
| [
{
"version": "v1",
"created": "Mon, 17 Apr 1995 12:07:27 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Shvedov",
"O. Yu.",
""
]
] |
quant-ph/9504015 | Markus Thoma | Klaus Schertler, Markus H. Thoma | COMBINATORIAL COMPUTATION OF CLEBSCH-GORDAN COEFFICIENTS | 13 pages, REVTEX | Annalen Phys. 5 (1996) 103 | null | UGI-95-04 | quant-ph | null | The addition of angular momenta can be reduced to elementary coupling
processes of spin-$\frac{1}{2}$-particles. In this way, a method is developed
which allows for a non-recursive, simultaneous computation of all
Clebsch-Gordan coefficients concerning the addition of two angular momenta. The
relevant equations can be interpreted easily, analogously to simple
probabilistic considerations. They provide an improved understanding of the
addition of angular momenta as well as a practicable evaluation of
Clebsch-Gordan coefficients in an easier way than within the well-known
methods.
| [
{
"version": "v1",
"created": "Thu, 20 Apr 1995 11:42:03 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Schertler",
"Klaus",
""
],
[
"Thoma",
"Markus H.",
""
]
] |
quant-ph/9504016 | Reinhard Werner | R.F. Werner | The classical limit of quantum theory | plain TeX, 33 pages, no figures | null | null | RFW/95-cls | quant-ph cond-mat hep-th | null | For a quantum observable $A_\hbar$ depending on a parameter $\hbar$ we define
the notion ``$A_\hbar$ converges in the classical limit''. The limit is a
function on phase space. Convergence is in norm in the sense that $A_\hbar\to0$
is equivalent with $\Vert A_\hbar\Vert\to0$. The $\hbar$-wise product of
convergent observables converges to the product of the limiting phase space
functions. $\hbar^{-1}$ times the commutator of suitable observables converges
to the Poisson bracket of the limits. For a large class of convergent
Hamiltonians the $\hbar$-wise action of the corresponding dynamics converges to
the classical Hamiltonian dynamics. The connections with earlier approaches,
based on the WKB method, or on Wigner distribution functions, or on the limits
of coherent states are reviewed.
| [
{
"version": "v1",
"created": "Mon, 24 Apr 1995 07:11:55 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Werner",
"R. F.",
""
]
] |
quant-ph/9504017 | Haret Rosu | H.C. Rosu, M. Reyes, K.B. Wolf, O. Obreg\'on | Supersymmetry of Demkov-Ostrovsky effective potentials in the R_0=0
sector | 6 pp, LaTex | Phys. Lett. A 208 (1995) 33-39 | 10.1016/0375-9601(95)00760-Z | null | quant-ph | null | We present a supersymmetric analysis of the wave problem with a
Demkov-Ostrovsky spherically symmetric class of focusing potentials at zero
energy. Following a suggestion of L\'evai, we work in the so-called R_0=0
sector in order to obtain the superpartner (fermionic) potentials within
Witten's supersymmetric procedure. General solutions of the superpotential for
the known physical cases are given explicitly.
| [
{
"version": "v1",
"created": "Mon, 24 Apr 1995 18:21:00 GMT"
},
{
"version": "v2",
"created": "Mon, 5 Jun 1995 02:37:00 GMT"
},
{
"version": "v3",
"created": "Mon, 22 Jan 1996 20:24:00 GMT"
},
{
"version": "v4",
"created": "Sun, 25 Jan 1998 03:43:41 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Rosu",
"H. C.",
""
],
[
"Reyes",
"M.",
""
],
[
"Wolf",
"K. B.",
""
],
[
"Obregón",
"O.",
""
]
] |
quant-ph/9504018 | Haret Rosu | H.C. Rosu, M. Reyes, K.B. Wolf, O. Obreg\'on | Supersymmetric features of the Maxwell fish-eye lens | 5 pages in Latex, one figure not included has been published as Fig.
2 in Phys. Lett. A 208 (1995) 33-39 | SPIE Vol. 2730 (1996) 436-439 | 10.1117/12.231113 | IFUG-95/05 r | quant-ph | null | We provide a supersymmetric analysis of the Maxwell fisheye (MF) wave problem
at zero energy. Working in the so-called $R_{0}=0$ sector, we obtain the
corresponding superpartner (fermionic) MF effective potential within Witten's
one-dimensional (radial) supersymmetric procedure.
| [
{
"version": "v1",
"created": "Wed, 26 Apr 1995 03:36:00 GMT"
},
{
"version": "v2",
"created": "Mon, 5 Jun 1995 03:30:00 GMT"
},
{
"version": "v3",
"created": "Wed, 24 Apr 1996 17:03:00 GMT"
}
] | 2015-06-26T00:00:00 | [
[
"Rosu",
"H. C.",
""
],
[
"Reyes",
"M.",
""
],
[
"Wolf",
"K. B.",
""
],
[
"Obregón",
"O.",
""
]
] |
quant-ph/9504019 | Benni Reznik | B. Reznik | Unitary Evolution Between Pure and Mixed States | 13 pages, latex. Revised version. To appear in Phys. Rev. Lett | Phys.Rev.Lett. 76 (1996) 1192-1195 | 10.1103/PhysRevLett.76.1192 | UBC-TP-004-95 | quant-ph gr-qc hep-th | null | We propose an extended quantum mechanical formalism that is based on a wave
operator $\vr$, which is related to the ordinary density matrix via
$\rho=\vr\vr^\dagger$. This formalism allows a (generalized) unitary evolution
between pure and mixed states. It also preserves much of the connection between
symmetries and conservation laws. The new formalism is illustrated for the case
of a two level system.
| [
{
"version": "v1",
"created": "Wed, 26 Apr 1995 23:09:50 GMT"
},
{
"version": "v2",
"created": "Wed, 14 Jun 1995 23:55:55 GMT"
},
{
"version": "v3",
"created": "Tue, 12 Sep 1995 20:17:49 GMT"
},
{
"version": "v4",
"created": "Tue, 19 Dec 1995 00:01:43 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Reznik",
"B.",
""
]
] |
quant-ph/9505001 | null | V.I. Man'ko, G.M. Tino | Experimental limit on the blue shift of the frequency of light implied
by a q-nonlinearity | 7pages,Latex,Napoli University preprint | null | 10.1016/0375-9601(95)00327-Y | DSF-95-13 | quant-ph | null | We discuss the implications of an experiment in which the frequencies of two
laser beams are compared for different intensities in order to search for a
dependence of the frequency of light on its intensity. Since no such dependence
was found it is possible to place bounds on a description of the
electromagnetic field in terms of q-oscillators. We conclude that the value of
the nonlinearity parameter is smaller than $10^{-17}~$.
| [
{
"version": "v1",
"created": "Wed, 3 May 1995 12:46:47 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Man'ko",
"V. I.",
""
],
[
"Tino",
"G. M.",
""
]
] |
quant-ph/9505002 | Zdenek Hradil | Zdenek Hradil | Quantization of electromagnetic field in inhomogeneous dispersive
dielectrics | 15 pages, Revtex,emlines.sty | null | 10.1103/PhysRevA.53.3687 | null | quant-ph | null | Canonical quantization of electromagnetic field inside the time--spatially
dispersive inhomogeneous dielectrics is presented. Interacting electromagnetic
and matter excitation fields create the closed system, Hamiltonian of which may
be diagonalized by generalized polariton transformation. Resulting dispersion
relations coincide with the classical ones obtained by the solution of wave
equation, the corresponding mode decomposition is, however, orthogonal and
complete in the enlarged Hilbert space.
| [
{
"version": "v1",
"created": "Thu, 4 May 1995 10:32:54 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Hradil",
"Zdenek",
""
]
] |
quant-ph/9505003 | Piotr Garbaczewski | P. Garbaczewski, J. R. Klauder, R. Olkiewicz | The Schroedinger Problem, Levy Processes Noise in Relativistic Quantum
Mechanics | Latex file | Phys.Rev. E51 (1995) 4114-4131 | 10.1103/PhysRevE.51.4114 | null | quant-ph chem-ph gr-qc hep-th math.PR | null | The main purpose of the paper is an essentially probabilistic analysis of
relativistic quantum mechanics. It is based on the assumption that whenever
probability distributions arise, there exists a stochastic process that is
either responsible for temporal evolution of a given measure or preserves the
measure in the stationary case. Our departure point is the so-called
Schr\"{o}dinger problem of probabilistic evolution, which provides for a unique
Markov stochastic interpolation between any given pair of boundary probability
densities for a process covering a fixed, finite duration of time, provided we
have decided a priori what kind of primordial dynamical semigroup transition
mechanism is involved. In the nonrelativistic theory, including quantum
mechanics, Feyman-Kac-like kernels are the building blocks for suitable
transition probability densities of the process. In the standard "free" case
(Feynman-Kac potential equal to zero) the familiar Wiener noise is recovered.
In the framework of the Schr\"{o}dinger problem, the "free noise" can also be
extended to any infinitely divisible probability law, as covered by the
L\'{e}vy-Khintchine formula. Since the relativistic Hamiltonians $|\nabla |$
and $\sqrt {-\triangle +m^2}-m$ are known to generate such laws, we focus on
them for the analysis of probabilistic phenomena, which are shown to be
associated with the relativistic wave (D'Alembert) and matter-wave
(Klein-Gordon) equations, respectively. We show that such stochastic processes
exist and are spatial jump processes. In general, in the presence of external
potentials, they do not share the Markov property, except for stationary
situations. A concrete example of the pseudodifferential Cauchy-Schr\"{o}dinger
evolution is analyzed in detail. The relativistic covariance of related wave
| [
{
"version": "v1",
"created": "Tue, 9 May 1995 13:20:58 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Garbaczewski",
"P.",
""
],
[
"Klauder",
"J. R.",
""
],
[
"Olkiewicz",
"R.",
""
]
] |
quant-ph/9505004 | Reidun Twarock | C. Schulte, R. Twarock, A. Bohm | The Rigged Hilbert Space Formulation of Quantum Mechanics and its
Implications for Irreversibility | 18 pages, latex | null | null | ASI-TPA/6/95 | quant-ph | null | Quantum mechanics in the Rigged Hilbert Space formulation describes
quasistationary phenomena mathematically rigorously in terms of Gamow vectors.
We show that these vectors exhibit microphysical irreversibility, related to an
intrinsic quantum mechanical arrow of time, which states that preparation of a
state has to precede the registration of an observable in this state. Moreover,
the Rigged Hilbert Space formalism allows the derivation of an exact golden
rule describing the transition of a pure Gamow state into a mixture of
interaction-free decay products.
| [
{
"version": "v1",
"created": "Fri, 12 May 1995 10:49:48 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Schulte",
"C.",
""
],
[
"Twarock",
"R.",
""
],
[
"Bohm",
"A.",
""
]
] |
quant-ph/9505005 | null | Carlo Presilla and Ubaldo Tambini | A Selective Relaxation Method for Numerical Solution of Schr\"odinger
Problems | 4 pages with figures, uuencoded Z-compressed ps file | Phys.Rev. E52 (1995) 4495-4498 | 10.1103/PhysRevE.52.4495 | null | quant-ph comp-gas cond-mat hep-lat nlin.CG | null | We propose a numerical method for evaluating eigenvalues and eigenfunctions
of Schr\"odinger operators with general confining potentials. The method is
selective in the sense that only the eigenvalue closest to a chosen input
energy is found through an absolutely-stable relaxation algorithm which has
rate of convergence infinite. In the case of bistable potentials the method
allows one to evaluate the fundamental energy splitting for a wide range of
tunneling rates.
| [
{
"version": "v1",
"created": "Fri, 12 May 1995 14:26:06 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Presilla",
"Carlo",
""
],
[
"Tambini",
"Ubaldo",
""
]
] |
quant-ph/9505006 | Haret Rosu | Haret C. Rosu, M. Reyes, K.B. Wolf, and O. Obreg\'on | Second solution of Demkov-Ostrovsky superpotentials | Several changes in the text in order to make it more precise and
correct, one more reference, mathematical results not affected | null | null | IFUG-95/08 r | quant-ph | null | We work out the second solution of the DO superpotentials in the $R_0=0$
sector.
| [
{
"version": "v1",
"created": "Tue, 16 May 1995 03:24:00 GMT"
},
{
"version": "v2",
"created": "Sun, 4 Jun 1995 22:37:00 GMT"
}
] | 2008-02-03T00:00:00 | [
[
"Rosu",
"Haret C.",
""
],
[
"Reyes",
"M.",
""
],
[
"Wolf",
"K. B.",
""
],
[
"Obregón",
"O.",
""
]
] |
quant-ph/9505007 | null | Laura M. Morato and Lorenza Viola | MARKOV DIFFUSIONS IN COMOVING COORDINATES AND STOCHASTIC QUANTIZATION OF
THE FREE RELATIVISTIC SPINLESS PARTICLE | 31 pages + 1 figure available upon request; Plain REVTeX | J.Math.Phys. 36 (1995) 4691-4710; Erratum-ibid. 37 (1996) 4769 | 10.1063/1.531333 | DFPD 95/TH/19, April 1995 | quant-ph | null | We revisit the classical approach of comoving coordinates in relativistic
hydrodynamics and we give a constructive proof for their global existence under
suitable conditions which is proper for stochastic quantization. We show that
it is possible to assign stochastic kinematics for the free relativistic
spinless particle as a Markov diffusion globally defined on ${\sf M}^4$. Then
introducing dynamics by means of a stochastic variational principle with
Einstein's action, we are lead to positive-energy solutions of Klein-Gordon
equation. The procedure exhibits relativistic covariance properties.
| [
{
"version": "v1",
"created": "Tue, 16 May 1995 14:48:40 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Morato",
"Laura M.",
""
],
[
"Viola",
"Lorenza",
""
]
] |
quant-ph/9505008 | Robert B. Griffiths | Robert B. Griffiths (Carnegie-Mellon) | Review of R. Omnes, THE INTERPRETATION OF QUANTUM MECHANICS | Plain Tex, 5 pages, no figures | null | null | null | quant-ph | null | Omnes' interpretation of quantum mechanics is summarized, and compared with
other consistent-history approaches by Gell-Mann and Hartle, and by Griffiths.
| [
{
"version": "v1",
"created": "Tue, 16 May 1995 15:23:31 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Griffiths",
"Robert B.",
"",
"Carnegie-Mellon"
]
] |
quant-ph/9505009 | Robert B. Griffiths | Robert B. Griffiths (Carnegie-Mellon) | Consistent Quantum Reasoning | Latex, 28 pages. One page of figures | null | null | null | quant-ph | null | Precise rules are developed in order to formalize the reasoning processes
involved in standard non-relativistic quantum mechanics, with the help of
analogies from classical physics. A classical or quantum description of a
mechanical system involves a {\it framework}, often chosen implicitly, and a
{\it statement} or assertion about the system which is either true or false
within the framework with which it is associated. Quantum descriptions are no
less ``objective'' than their classical counterparts, but differ from the
latter in the following respects: (i) The framework employs a Hilbert space
rather than a classical phase space. (ii) The rules for constructing meaningful
statements require that the associated projectors commute with each other and,
in the case of time-dependent quantum histories, that consistency conditions be
satisfied. (iii) There are incompatible frameworks which cannot be combined,
either in constructing descriptions or in making logical inferences about them,
even though any one of these frameworks may be used separately for describing a
particular physical system.
A new type of ``generalized history'' is introduced which extends previous
proposals by Omn\`es, and Gell-Mann and Hartle, and a corresponding consistency
condition which does not involve density matrices or single out a direction of
time. Applications which illustrate the formalism include: measurements of
spin, two-slit diffraction, and the emergence of the classical world from a
fully quantum description.
| [
{
"version": "v1",
"created": "Wed, 17 May 1995 22:13:20 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Griffiths",
"Robert B.",
"",
"Carnegie-Mellon"
]
] |
quant-ph/9505010 | Oleg Shvedov | O.Yu.Shvedov | HIGH ORDER BEHAVIOUR OF PERTURBATION RECURSIVE RELATIONS | 30 pages, LaTeX, 6 figures can be obtained from the author | null | null | null | quant-ph hep-ph hep-th | null | The problem of large order behaviour of perturbation theory for quantum
mechanical systems is considered. A new approach to it is developed. An
explicit mechanism showing the connection between large order recursive
relations and classical euclidean equations of motion is found. Large order
asymptotics of the solution to the recursive relations is constructed. The
developed method is applicable to the excited states, as well as to the ground
state. Singular points of the obtained asymptotics of the perturbation series
for eigenfunctions and density matrices are investigated and formulas being
valid near such points are obtained.
| [
{
"version": "v1",
"created": "Thu, 18 May 1995 10:46:20 GMT"
}
] | 2009-09-25T00:00:00 | [
[
"Shvedov",
"O. Yu.",
""
]
] |
quant-ph/9505011 | Isaac Chuang | I. L. Chuang and Y. Yamamoto | A Simple Quantum Computer | 8 pages RevTeX + 6 figures in postscript | null | 10.1103/PhysRevA.52.3489 | null | quant-ph | null | We propose an implementation of a quantum computer to solve Deutsch's
problem, which requires exponential time on a classical computer but only
linear time with quantum parallelism. By using a dual-rail qubit representation
as a simple form of error correction, our machine can tolerate some amount of
decoherence and still give the correct result with high probability. The design
which we employ also demonstrates a signature for quantum parallelism which
unambiguously delineates the desired quantum behavior from the merely
classical. The experimental demonstration of our proposal using quantum optical
components calls for the development of several key technologies common to
single photonics.
| [
{
"version": "v1",
"created": "Mon, 22 May 1995 21:20:00 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Chuang",
"I. L.",
""
],
[
"Yamamoto",
"Y.",
""
]
] |
quant-ph/9505012 | Piotr Garbaczewski | Piotr Garbaczewski and Robert Olkiewicz | Feynman-Kac Kernels in Markovian Representations of the Schroedinger
Interpolating Dynamics | Latex file, J. Math. Phys., accepted for publication | J.Math.Phys. 37 (1996) 732-751 | 10.1063/1.531412 | null | quant-ph adap-org chao-dyn chem-ph hep-th math.PR nlin.AO nlin.CD | null | Probabilistic solutions of the so called Schr\"{o}dinger boundary data
problem provide for a unique Markovian interpolation between any two strictly
positive probability densities designed to form the input-output statistics
data for the process taking place in a finite-time interval. The key issue is
to select the jointly continuous in all variables positive Feynman-Kac kernel,
appropriate for the phenomenological (physical) situation. We extend the
existing formulations of the problem to cases when the kernel is \it not \rm a
fundamental solution of a parabolic equation, and prove the existence of a
continuous Markov interpolation in this case. Next, we analyze the
compatibility of this stochastic evolution with the original parabolic
dynamics, while assumed to be governed by the temporally adjoint pair of
(parabolic) partial differential equations, and prove that the pertinent random
motion is a diffusion process. In particular, in conjunction with Born's
statistical interpretation postulate in quantum theory, we consider stochastic
processes which are compatible with the Schr\"{o}dinger picture quantum
evolution.
| [
{
"version": "v1",
"created": "Tue, 23 May 1995 08:31:07 GMT"
},
{
"version": "v2",
"created": "Tue, 16 Jan 1996 12:24:24 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Garbaczewski",
"Piotr",
""
],
[
"Olkiewicz",
"Robert",
""
]
] |
quant-ph/9505013 | B. M. Birla Science Centre | M.V.Altaiski (Centre for Applicable Mathematics and Computer Sciences,
B.M. Birla Science Centre) | Wavelet basis for the Schr\"{o}dinger equation | LaTeX 4 pages, 7Kb | null | null | BSC-CAMCS-95-05-04 | quant-ph | null | The self-similar representation for the Schr\"{o}dinger equation is derived.
| [
{
"version": "v1",
"created": "Tue, 16 May 1995 16:19:16 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Altaiski",
"M. V.",
"",
"Centre for Applicable Mathematics and Computer Sciences,\n B.M. Birla Science Centre"
]
] |
quant-ph/9505014 | John Costella | John P. Costella (School of Physics, The University of Melbourne) | [p,q] does not equal (i h-bar) | Standard LaTeX, 6 pages | null | null | UM-P-95/51 | quant-ph | null | In this short note, I point out that [p,q] does not equal (i h-bar), contrary
to the original claims of Born and Jordan, and Dirac. Rather, [p,q] is equal to
something that is *infinitesimally different* from (i h-bar). While this
difference is usually harmless, it does provide the solution of the Born-Jordan
"trace paradox" of [p,q]. More recently, subtleties of a very similar form have
been found to be of fundamental importance in quantum field theory.
| [
{
"version": "v1",
"created": "Wed, 24 May 1995 05:40:43 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Costella",
"John P.",
"",
"School of Physics, The University of Melbourne"
]
] |
quant-ph/9505015 | Mohammad Ardehali | M. Ardehali | Quantum oblivious transfer protocols based on EPR states | The EPR states that Alice sends to Bob are no longer orthogonal. Thus
the modified protocol is secure even if Bob has the technology to determine
which state was sent to him. The new protocol is efficient, feasible with
present technology, and is secure against general attacks as long as Bob can
not store the bit for an arbitrarily long period of time | null | null | null | quant-ph | null | We describe efficient protocols for quantum oblivious transfer and for
one-out-of-two quantum oblivious transfer. These protocols, which can be
implemented with present technology, are secure against general attacks as long
as the cheater can not store the bit for an arbitrarily long period of time.
| [
{
"version": "v1",
"created": "Wed, 24 May 1995 07:29:31 GMT"
},
{
"version": "v2",
"created": "Sat, 17 Jun 1995 06:10:13 GMT"
}
] | 2008-02-03T00:00:00 | [
[
"Ardehali",
"M.",
""
]
] |
quant-ph/9505016 | Quantum Computation | A. Barenco | A Universal Two--Bit Gate for Quantum Computation | 3 pages, RevTeX, two figures in a uuencoded file | null | 10.1098/rspa.1995.0066 | null | quant-ph | null | We prove the existence of a class of two--input, two--output gates any one of
which is universal for quantum computation. This is done by explicitly
constructing the three--bit gate introduced by Deutsch [Proc.~R.~Soc.~London.~A
{\bf 425}, 73 (1989)] as a network consisting of replicas of a single two--bit
gate.
| [
{
"version": "v1",
"created": "Wed, 24 May 1995 13:38:19 GMT"
}
] | 2015-06-26T00:00:00 | [
[
"Barenco",
"A.",
""
]
] |
quant-ph/9505017 | B. M. Blasi | Benedikt Bl\"asi, Lucien Hardy | Realism and Time Symmetry in Quantum Mechanics | 14 pages, LaTeX, one section (sec. 4) added, to be published in Phys.
Lett. A | Phys. Lett. A 207, 119 - 125 (1995) | 10.1016/0375-9601(95)00682-S | DTP/95/25 | quant-ph | null | We describe a gedanken experiment with an interferometer in the case of pre-
and postselection in two different time symmetric ways: We apply the ABL
formalism and the de Broglie--Bohm model. Interpreting these descriptions
ontologically, we get two very different concepts of reality. Finally, we
discuss some problems implied by these concepts.
| [
{
"version": "v1",
"created": "Wed, 24 May 1995 14:41:08 GMT"
},
{
"version": "v2",
"created": "Wed, 6 Sep 1995 16:17:40 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Bläsi",
"Benedikt",
""
],
[
"Hardy",
"Lucien",
""
]
] |
quant-ph/9505018 | Quantum Computation | D. Deutsch, A. Barenco and A. Ekert | Universality in Quantum Computation | 11 pages, LaTeX | null | 10.1098/rspa.1995.0065 | null | quant-ph | null | We show that in quantum computation almost every gate that operates on two or
more bits is a universal gate. We discuss various physical considerations
bearing on the proper definition of universality for computational components
such as logic gates.
| [
{
"version": "v1",
"created": "Wed, 24 May 1995 16:27:15 GMT"
}
] | 2015-06-26T00:00:00 | [
[
"Deutsch",
"D.",
""
],
[
"Barenco",
"A.",
""
],
[
"Ekert",
"A.",
""
]
] |
quant-ph/9505019 | Mohammad Ardehali | M. Ardehali | A Quantum Bit Commitment Protocol Based on EPR States | LaTeX file, 10 pages, no figures. It is shown how a cheating sender
who has the technology to store an EPR particle for an arbitrarily long
period of time can break the proposed protocol. Some recent references have
been added | null | null | null | quant-ph | null | A protocol for quantum bit commitment is proposed. The protocol is feasible
with present technology and is secure against cheaters with unlimited computing
power as long as the sender does not have the technology to store an EPR
particle for an arbitrarily long period of time. The protocol is very
efficient, requiring only tens of particles.
| [
{
"version": "v1",
"created": "Fri, 26 May 1995 11:58:35 GMT"
},
{
"version": "v2",
"created": "Tue, 6 Jun 1995 08:59:21 GMT"
},
{
"version": "v3",
"created": "Mon, 11 Dec 1995 09:35:26 GMT"
},
{
"version": "v4",
"created": "Mon, 20 May 1996 05:34:11 GMT"
},
{
"version": "v5",
"created": "Thu, 13 Jun 1996 04:16:55 GMT"
}
] | 2008-02-03T00:00:00 | [
[
"Ardehali",
"M.",
""
]
] |
quant-ph/9505020 | Krzysztof Wodkiewicz | K. Wodkiewicz | Randomness, Nonlocality and information in entagled correlations | 19 pages, REVTEX, 8 figures included in the uuencoded postscript file | null | 10.1103/PhysRevA.52.3503 | null | quant-ph | null | It is shown that the Einstein, Podolsky and Rosen (EPR) correlations for
arbitrary spin-s and the Greenberger, Horne and Zeilinger (GHZ) correlations
for three particles can be described by nonlocal joint and conditional quantum
probabilities. The nonlocality of these probabilities makes the Bell's
inequalities void. A description that exhibits the relation between the
randomness and the nonlocality of entangled correlations is introduced.
Entangled EPR and GHZ correlations are studied using the Gibbs-Shannon entropy.
The nonlocal character of the EPR correlations is tested using the information
Bell's inequalities. Relations between the randomness, the nonlocality and the
entropic information for the EPR and the GHZ correlations are established and
discussed.
| [
{
"version": "v1",
"created": "Fri, 26 May 1995 14:56:12 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Wodkiewicz",
"K.",
""
]
] |
quant-ph/9505021 | Piotr Rozmej | P.Rozmej (University MCS, Lublin, Poland) and R.Arvieu (ISN, Grenoble,
France) | Spin-Orbit Pendulum: the Microscopic Stern-Gerlach Effect | 4 pages, LaTeX (precisely RevTeX), attached 4 complicated Postscript
figures , Paper submitted to Phys.Rev.A | null | 10.1088/0953-4075/29/7/015 | null | quant-ph | null | The motion of a particle with a spin in spherical harmonic oscillator
potential with spin-orbit interaction is studied. We have focus our attention
on spatial motion of wave packets, giving a description complementary to motion
of spin discussed already in [1]. The particular initial conditions studied
here lead to the most transparent formulas and can be treated analytically. A
strong analogy with the Stern-Gerlach experiment is suggested. [1] R.Arvieu and
P.Rozmej, Phys.Rev.A50 (1994) 4376.
| [
{
"version": "v1",
"created": "Tue, 30 May 1995 17:26:21 GMT"
},
{
"version": "v2",
"created": "Wed, 31 May 1995 19:40:18 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Rozmej",
"P.",
"",
"University MCS, Lublin, Poland"
],
[
"Arvieu",
"R.",
"",
"ISN, Grenoble,\n France"
]
] |
quant-ph/9505022 | Wolfgang Luecke | W. Luecke | Nonlinear Schroedinger Dynamics and Nonlinear Observables | 15 pages, LaTeX file, 1 figure in PicTeX | null | null | null | quant-ph | null | It is is explained why physical consistency requires substituting linear
observables by nonlinear ones for quantum systems with nonlinear time evolution
of pure states. The exact meaning and the concrete physical interpretation are
described in full detail for a special case of the nonlinear Doebner-Goldin
equation.
| [
{
"version": "v1",
"created": "Tue, 30 May 1995 09:40:33 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Luecke",
"W.",
""
]
] |
quant-ph/9505023 | Luanne Neumann | Henry P. Stapp | The Hard Problem: A Quantum Approach | 28 pages, no figures, latexed, uses math_macros.tex that can be found
on Archive, this paper was submitted in 5/95 and this is a revised version
full postscript available from
http://theor1.lbl.gov/www/theorygroup/papers/37163rev.ps | null | null | 37163rev | quant-ph | null | Contents:
1. Introduction: Philosophical Setting
2. Quantum Model of the Mind/Brain
3. Person and Self
4. Meeting Baars's Criteria for Consciousness
5. Qualia
6. Free-Will
| [
{
"version": "v1",
"created": "Tue, 30 May 1995 17:09:47 GMT"
},
{
"version": "v2",
"created": "Tue, 21 Nov 1995 21:41:53 GMT"
}
] | 2008-02-03T00:00:00 | [
[
"Stapp",
"Henry P.",
""
]
] |
quant-ph/9505024 | null | M. Kitano | Geometry of One-Dimensional Wave Propagation | RevTeX, 16 pages, 6 postscript figures | Phys.Rev.A51:4427-4432,1995 | 10.1103/PhysRevA.51.4427 | null | quant-ph | null | We investigate the geometrical features of one-dimensional wave propagation,
whose dynamics is described by the (2+1)-dimensional Lorentz group. We find
many interesting geometrical ingredients such as spinorlike behavior of wave
amplitudes, gauge transformations, Bloch-type equations, and Lorentz-group
Berry phases. We also propose an optical experiment to verify these effects.
| [
{
"version": "v1",
"created": "Wed, 31 May 1995 06:18:38 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Kitano",
"M.",
""
]
] |
quant-ph/9505025 | Tim Palmer | T.N.Palmer (ECMWF, UK) | A Local Deterministic Model of Quantum Spin Measurement | This paper has been accepted for publication in the Proceedings of
the Royal Society of London (Proc.Roy.Soc.A) I will mail the paper's figures
on request (write to [email protected]) | null | null | null | quant-ph chao-dyn gr-qc nlin.CD | null | The conventional view, that Einstein was wrong to believe that quantum
physics is local and deterministic, is challenged. A parametrised model, Q, for
the state vector evolution of spin 1/2 particles during measurement is
developed. Q draws on recent work on so-called riddled basins in dynamical
systems theory, and is local, deterministic, nonlinear and time asymmetric.
Moreover the evolution of the state vector to one of two chaotic attractors
(taken to represent observed spin states) is effectively uncomputable.
Motivation for this model arises from Penrose's speculations about the nature
and role of quantum gravity. Although the evolution of Q's state vector is
uncomputable, the probability that the system will evolve to one of the two
attractors is computable. These probabilities correspond quantitatively to the
statistics of spin 1/2 particles. In an ensemble sense the evolution of the
state vector towards an attractor can be described by a diffusive random walk.
Bell's theorem and a version of the Bell-Kochen_specker quantum entanglement
paradox are discussed. It is shown that proving an inconsistency with locality
demands the existence of definite truth values to certain counterfactual
propositions. In Q these deterministic propositions are physically uncomputable
and no non-algorithmic solution is either known or suspected. Adapting the
mathematical formalist approach, the non-existence of definite truth values to
such counterfactual propositions is posited. No inconsistency with experiment
is found. Hence Q is not necessarily constrained by Bell's inequality.
| [
{
"version": "v1",
"created": "Wed, 31 May 1995 15:06:41 GMT"
}
] | 2008-02-03T00:00:00 | [
[
"Palmer",
"T. N.",
"",
"ECMWF, UK"
]
] |
quant-ph/9506001 | Zdenek Hradil | Zden\v{e}k Hradil, Robert My\v{s}ka, Tom\'a\v{s} Opatrn\'y, and
Ji\v{r}\'i Bajer (Department of Optics, Palacky Uni., Olomouc) | Entropy of phase measurement: Quantum phase via quadrature measurement | 4 pages, Revtex, 2 figures .pcx uuencode | null | 10.1103/PhysRevA.53.3738 | null | quant-ph | null | The content of phase information of an arbitrary phase--sensitive measurement
is evaluated using the maximum likelihood estimation. The phase distribution is
characterized by the relative entropy--a nonlinear functional of input quantum
state. As an explicit example the multiple measurement of quadrature operator
is interpreted as quantum phase detection achieving the ultimate resolution
predicted by the Fisher information.
| [
{
"version": "v1",
"created": "Fri, 2 Jun 1995 13:19:05 GMT"
}
] | 2016-08-15T00:00:00 | [
[
"Hradil",
"Zdeněk",
"",
"Department of Optics, Palacky Uni., Olomouc"
],
[
"Myška",
"Robert",
"",
"Department of Optics, Palacky Uni., Olomouc"
],
[
"Opatrný",
"Tomáš",
"",
"Department of Optics, Palacky Uni., Olomouc"
],
[
"Bajer",
"Jiří",
"",
"Department of Optics, Palacky Uni., Olomouc"
]
] |
quant-ph/9506002 | B. M. Birla Science Centre | B.G. Sidharth (Centre for Applicable Mathematics and Computer
Sciences, B.M. Birla Science Centre) | A NOTE ON DEGENERATE AND ANAMOLOUS BOSONS | LaTeX 4 pages | null | null | BSC-CAMCS-95-05-2 | quant-ph | null | In this note it is shown that for a mono-energetic collection of Bosons, at a
certain (non-zero) momentum or temperature, there is condensation while there
is another momentum or temperature at which there is infinite dilution and
below which the gas exhibits anomalous Fermionic behaviour.
| [
{
"version": "v1",
"created": "Sun, 4 Jun 1995 13:34:11 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Sidharth",
"B. G.",
"",
"Centre for Applicable Mathematics and Computer\n Sciences, B.M. Birla Science Centre"
]
] |
quant-ph/9506003 | Yannick Meurice | B. Bacus, Y. Meurice, and A. Soemadi (Univ. of Iowa, Iowa City) | Precise Determination of the Energy Levels of the Anharmonic Oscillator
from the Quantization of the Angle Variable | 7 pages, Latex , uses revtex | J.Phys. A28 (1995) L381-L386 | 10.1088/0305-4470/28/14/002 | U. of Iowa 94-17 | quant-ph hep-th | null | Using an ansatz motivated by the classical form of $e^{i\phi}$, where $\phi$
is the angle variable, we construct operators which satisfy the commutation
relations of the creation-annihilation operators for the anharmonic oscillator.
The matrix elements of these operators can be expressed in terms of {\it
entire} functions in the position complex plane. These functions provide
solutions of the Ricatti equation associated with the time-independent
Schr\"odinger equation. We relate the normalizability of the eigenstates to the
global properties of the flows of this equation. These exact results yield
approximations which complement the WKB approximation and allow an arbitrarily
precise determination of the energy levels. We give numerical results for the
first 10 levels with 30 digits. We address the question of the quantum
integrability of the system.
| [
{
"version": "v1",
"created": "Mon, 5 Jun 1995 17:07:45 GMT"
}
] | 2009-10-28T00:00:00 | [
[
"Bacus",
"B.",
"",
"Univ. of Iowa, Iowa City"
],
[
"Meurice",
"Y.",
"",
"Univ. of Iowa, Iowa City"
],
[
"Soemadi",
"A.",
"",
"Univ. of Iowa, Iowa City"
]
] |
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