From: Matthew Davis <mdavis_at_physics.uq.edu.au>

Date: Fri, 04 Apr 2008 08:57:32 +1000

Date: Fri, 04 Apr 2008 08:57:32 +1000

The following message was sent to the matts_arxiv list by Matthew Davis <mdavis_at_physics.uq.edu.au>

Hi all,

A slightly calmer week with 18 new preprints and 8 replacements. Our mail

server decided to delete all our incoming mail last Friday afternoon rather than

pass it on to the recipients, and so my incoming arXiv emails for that day were

lost. Hence I can to scour that days on the web, hence the different format for

the last four.

It's much more inconvenient that way!

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arXiv:0803.3128

Date: Fri, 21 Mar 2008 09:08:00 GMT (166kb)

Title: Phase diagram and momentum distribution of an interacting Bose gas in a

bichromatic lattice

Authors: Xiaolong Deng (LP2MC, UJF, Grenoble) R. Citro (University of Salerno

and LP2MC) A. Minguzzi (LP2MC) E. Orignac (ENS-Lyon)

Categories: cond-mat.other cond-mat.stat-mech

Comments: 10 pages, RevTeX 4, 9 Encapsulated Postscript figure files

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

\\

We determine the phase diagram and the momentum distribution for a

one-dimensional Bose gas with repulsive short range interactions in the

presence of a two-color lattice potential, with incommensurate ratio among the

respective wave lengths, by using a combined numerical (DMRG) and analytical

(bosonization) analysis. The system displays a delocalized (superfluid) phase

at small values of the intensity of the secondary lattice V2 and a localized

(Bose glass-like) phase at larger intensity V2. We analyze the localization

transition as a function of the height V2 beyond the known limits of free and

hard-core bosons. We find that weak repulsive interactions unfavor the

localized phase i. e. they increase the critical value of V2 at which

localization occurs. In the case of integer filling of the primary lattice, the

phase diagram at fixed density displays, in addition to a transition from a

superfluid to a Bose glass phase, a transition to a Mott-insulating state for

not too large V2 and large repulsion. We also analyze the emergence of a

Bose-glass phase by looking at the evolution of the Mott-insulator lobes when

increasing V2. The Mott lobes shrink and disappear above a critical value of

V2. Finally, we characterize the superfluid phase by the momentum distribution,

and show that it displays a power-law decay at small momenta typical of

Luttinger liquids, with an exponent depending on the combined effect of the

interactions and of the secondary lattice. In addition, we observe two side

peaks which are due to the diffraction of the Bose gas by the second lattice.

This latter feature could be observed in current experiments as characteristics

of pseudo-random Bose systems.

\\ ( http://arxiv.org/abs/0803.3128 , 166kb)

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arXiv:0803.3173

Date: Fri, 21 Mar 2008 15:05:17 GMT (269kb)

Title: Bose Fluids Above Tc

Authors: Philip W Anderson

Categories: cond-mat.stat-mech cond-mat.str-el

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

\\

This paper emphasizes that non-linear rotational or diamagnetic

susceptibility is characteristic of Bose fluids above their superfluid Tcs. For

sufficiently slow rotation or, for superconductors, weak B-fields this amounts

to an incompressible response to vorticity. The cause is that there are terms

missing in the conventionally accepted model Hamiltonian for quantized vortices

in the Bose fluid. The resulting susceptibility can account for recent

observations of Chan et al on solid He, and Ong et al on cuprate

superconductors.

\\ ( http://arxiv.org/abs/0803.3173 , 269kb)

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arXiv:0803.3113

Date: Fri, 21 Mar 2008 05:54:40 GMT (80kb)

Title: Tunneling and energy splitting in an asymmetric double-well potential

Authors: Dae-Yup Song

Categories: quant-ph

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

\\

An asymmetric double-well potential is considered, assuming that the minima

of the wells are quadratic with a frequency $\omega$ and the difference of the

minima is close to a multiple of $\hbar \omega$. A WKB wave function is

constructed on both sides of the local maximum between the wells, by matching

the WKB function to the exact wave functions near the classical turning points.

The continuities of the wave function and its first derivative at the local

maximum then give the energy-level splitting formula, which not only reproduces

the instanton result for a symmetric potential, but also elucidates the

appearance of resonances of tunneling in the asymmetric potential.

\\ ( http://arxiv.org/abs/0803.3113 , 80kb)

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arXiv:0803.3199

Date: Fri, 21 Mar 2008 17:13:23 GMT (50kb)

Date (revised v2): Fri, 21 Mar 2008 21:14:43 GMT (51kb)

Title: A statistical mechanics model for free-for-all airplane passenger

boarding

Authors: Jason H. Steffen (Fermilab Center for Particle Astrophysics)

Categories: physics.soc-ph physics.pop-ph

Comments: 4 pages 2 figures, submitted to AJP

Report-no: FERMILAB-PUB-08-068-A

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

\\

I present and discuss a model for the free-for-all passenger boarding which

is employed by some discount air carriers. The model is based on the principles

of statistical mechanics where each seat in the aircraft has an associated

binding energy which reflects the preferences of the population of air

travelers. As each passenger enters the airplane they select their seats using

Boltzmann statistics, proceed to that location, load their luggage, sit down,

and the partition function seen by remaining passengers is modified to reflect

this fact. I discuss the various model parameters and make qualtitative

comparisons of this passenger boarding model with models which involve assigned

seats. This model may be of value to industry professional as a useful

description of this boarding method. However, it also has significant value as

a pedagogical tool since it is a relatively unusual application of

undergraduate level physics and it describes a situation with which many

students and faculty may be familiar.

\\ ( http://arxiv.org/abs/0803.3199 , 51kb)

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arXiv:0803.3225

Date: Sun, 23 Mar 2008 18:36:56 GMT (2430kb,D)

Title: Turbulent dynamics in rotating helium superfluids

Authors: V.B. Eltsov, R. de Graaf, R. Hanninen, M. Krusius, R.E. Solntsev, V.S.

L'vov, A.I. Golov, and P.M. Walmsley

Categories: cond-mat.other cond-mat.supr-con

Comments: 100 pages 47 figures. Submitted for publication in Progress in Low

Temperature Physics, Vol. XVI

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

\\

New techniques, both for generating and detecting turbulence in the helium

superfluids 3He-B and 4He, have recently given insight in how turbulence is

started, what the dissipation mechanisms are, and how turbulence decays when it

appears as a transient state or when externally applied turbulent pumping is

switched off. Important simplifications are obtained by using 3He-B as working

fluid, where the highly viscous normal component is practically always in a

state of laminar flow, or by cooling 4He to low temperatures where the normal

fraction becomes vanishingly small. We describe recent studies from the low

temperature regime, where mutual friction becomes small or practically

vanishes. This allows us to elucidate the mechanisms at work in quantum

turbulence on approaching the zero temperature limit.

\\ ( http://arxiv.org/abs/0803.3225 , 2430kb)

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arXiv:0803.3238

Date: Fri, 21 Mar 2008 22:08:33 GMT (404kb)

Title: Quantum Monte Carlo Simulations of the BCS-BEC Crossover at Finite

Temperature

Authors: Aurel Bulgac, Joaquin E. Drut, Piotr Magierski

Categories: cond-mat.stat-mech

Comments: 20 pages, 17 figures

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

\\

The Quantum Monte Carlo method for spin 1/2 fermions at finite temperature is

formulated for dilute systems with an s-wave interaction. The motivation and

the formalism are discussed along with descriptions of the algorithm and

various numerical issues. We report on results for the energy, entropy and

chemical potential as a function of temperature. We give upper bounds on the

critical temperature T_c for the onset of superfluidity, obtained by studying

the finite size scaling of the condensate fraction. All of these quantities

were computed for couplings around the unitary regime in the range -0.5 \le

(k_F a)^{-1} \le 0.2, where a is the s-wave scattering length and k_F is the

Fermi momentum of a non-interacting gas at the same density. In all cases our

data is consistent with normal Fermi gas behavior above a characteristic

temperature T_0 > T_c, which depends on the coupling and is obtained by

studying the deviation of the caloric curve from that of a free Fermi gas. For

T_c < T < T_0 we find deviations from normal Fermi gas behavior that can be

attributed to pairing effects. Low temperature results for the energy and the

pairing gap are shown and compared with Green Function Monte Carlo results by

other groups.

\\ ( http://arxiv.org/abs/0803.3238 , 404kb)

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arXiv:0803.3239

Date: Fri, 21 Mar 2008 22:12:53 GMT (742kb)

Title: Theory of Bose-Einstein condensation and superfluidity of

two-dimensional polaritons in an in-plane harmonic potential

Authors: Oleg L. Berman, Yurii E. Lozovik and David W. Snoke

Categories: cond-mat.mes-hall cond-mat.str-el

Comments: 14 pages, 5 figures. Accepted for publication by Physical review B

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

\\

Recent experiments have shown that it is possible to create an in-plane

harmonic potential trap for a two-dimensional (2D) gas of exciton-polaritons in

a microcavity structure, and evidence has been reported of Bose-Einstein

condensation of polaritons accumulated in this type of trap. We present here

the theory of Bose-Einstein condensation (BEC) and superfluidity of the exciton

polaritons in a harmonic potential trap. Along the way, we determine a general

method for defining the superfluid fraction in a 2D trap, in terms of angular

momentum representation. We show that in the continuum limit, as the trap

becomes shallower the superfluid fraction approaches the 2D Kosterlitz-Thouless

limit, while the condensate fraction approaches zero, as expected.

\\ ( http://arxiv.org/abs/0803.3239 , 742kb)

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arXiv:0803.3277

Date: Sat, 22 Mar 2008 14:44:28 GMT (13kb)

Title: Virial theorems for trapped quantum gases

Authors: F\'elix Werner (LKB - Lhomond)

Categories: cond-mat.other

Proxy: ccsd hal-00266437

\\

We present a general virial theorem for quantum particles with arbitrary

zero-range or finite-range interactions in an arbitrary external potential. We

deduce virial theorems for several situations relevant to trapped gases:

zero-range interactions with and without Efimov effect, narrow resonances, and

finite-range interactions of infinite scattering length.

\\ ( http://arxiv.org/abs/0803.3277 , 13kb)

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arXiv:0803.3451

Date: Mon, 24 Mar 2008 20:01:41 GMT (22kb)

Title: Bose-Einstein condensation of indirect excitons in graphene bilayers

Authors: C.-H. Zhang, Yogesh N. Joglekar

Categories: cond-mat.mes-hall cond-mat.str-el

Comments: 4 pages, 3 figures

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

\\

Graphene, a single sheet of graphite with honeycomb lattice structure, has

massless carriers whose density and polarity can be tuned by external gate

voltage. We investigate the ground state phase diagram of graphene bilayers

separated by distance $d$ where the top layer has electrons and the bottom

layer has holes, using mean-field theory. We find that a uniform excitonic

condensate ground state occurs over a large range of carrier densities and is

(relatively) insensitive to the stacking. We obtain the quasiparticle spectrum,

renormalized quasiparticle speed, and calculate the quasiparticle density of

states. We discuss the implications of our results and present arguments which

suggest that the mass of these excitons, with massless particles as

constituents, is proportional to the square-root of the carrier density.

\\ ( http://arxiv.org/abs/0803.3451 , 22kb)

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arXiv:0803.3471

Date: Tue, 25 Mar 2008 19:55:22 GMT (7kb)

Title: Skepsis on the scenario of Biological Evolution provided by stochastic

models

Authors: Thomas Oikonomou

Categories: cond-mat.stat-mech

Comments: 8 pages

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

\\

Stochastic models, based on random processes, may lead to power law

distributions, which provide long range correlations. The observation of power

law behavior and the presence of long range correlations in biological systems

has been demonstrated in various studies. The combination of the two just

mentioned results, theoretical and experimental, supports strongly the scenario

of biological evolution across different organisms. In the current Letter we

explore in a general way, using the algebra of Nonextensive Statistics

introduced by Tsallis and coworkers, if the processes which are described by a

class of stochastic models are really random and discuss the results with

regard to a possible biological evolution.

\\ ( http://arxiv.org/abs/0803.3471 , 7kb)

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arXiv:0803.3588

Date: Tue, 25 Mar 2008 16:16:33 GMT (304kb)

Title: Enhanced phase sensitivity and soliton formation in an integrated BEC

interferometer

Authors: Antonio Negretti and Carsten Henkel

Categories: quant-ph

Comments: 6 pages, 3 figures, Iop LaTex2e

Journal-ref: J. Phys. B: At. Mol. Opt. Phys. 37 No 23 (14 December 2004)

L385-L390

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

\\

We study the dynamics of Bose-Einstein condensates in time-dependent

microtraps for the purpose of understanding the influence of the mean field

interaction on the performance of interferometers. We identify conditions where

the non-linearity due to atom interactions increases the sensitivity of

interferometers to a phase shift. This feature is connected with the adiabatic

generation of a dark soliton. We analyze the robustness of this phenomenon with

respect to thermal fluctuations, due to excited near fields in an

electromagnetic surface trap.

\\ ( http://arxiv.org/abs/0803.3588 , 304kb)

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arXiv:0803.3771

Date: Wed, 26 Mar 2008 17:09:37 GMT (287kb)

Title: Optical lattice quantum Hall effect

Authors: Rebecca N. Palmer, Alexander Klein, Dieter Jaksch

Categories: cond-mat.mes-hall

Comments: 14 pages, 5 figures

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

\\

We explore the behavior of interacting bosonic atoms in an optical lattice

subject to a large artificial magnetic field. We extend earlier investigations

of this system where the number of magnetic flux quanta per unit cell alpha is

close to a simple rational number [Phys. Rev. Lett. 96, 180407 (2006)].

Interesting topological states such as the Laughlin and Read-Rezayi states can

occur even if the atoms experience a weak trapping potential in one direction.

An explicit numerical calculation near alpha = 1/2 shows that the system

exhibits a striped vortex lattice phase of one species, which is analogous to

the behavior of a two-species system for small alpha. We also investigate

methods to probe the encountered states. These include spatial correlation

functions and the measurement of noise correlations in time of flight expanded

atomic clouds. Characteristic differences arise which allow for an

identification of the respective quantum Hall states. We furthermore discuss

that a counterintuitive flow of the Hall current occurs for certain values of

alpha.

\\ ( http://arxiv.org/abs/0803.3771 , 287kb)

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arXiv:0803.3797

Date: Wed, 26 Mar 2008 19:14:58 GMT (221kb)

Title: Condensate fraction in a 2D Bose gas measured across the Mott-insulator

transition

Authors: I. B. Spielman, W. D. Phillips, and J. V. Porto

Categories: cond-mat.other

Comments: 4 pages, 3 figures

Journal-ref: Phys. Rev. Lett., 100, 120402 (2008)

License: http://creativecommons.org/licenses/publicdomain/

\\

We realize a single-band 2D Bose-Hubbard system with Rb atoms in an optical

lattice and measure the condensate fraction as a function of lattice depth,

crossing from the superfluid to the Mott-insulating phase. We quantitatively

identify the location of the superfluid to normal transition by observing when

the condensed fraction vanishes. Our measurement agrees with recent quantum

Monte Carlo calculations for a finite-sized 2D system to within experimental

uncertainty.

\\ ( http://arxiv.org/abs/0803.3797 , 221kb)

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arXiv:0803.3604

Date: Tue, 25 Mar 2008 18:30:23 GMT (325kb)

Title: Was There A Big Bang?

Authors: Robert K. Soberman, Maurice Dubin

Categories: physics.gen-ph

Comments: 9 pages, 4 figures

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

\\

The big bang hypothesis is widely accepted despite numerous physics

conflicts. It rests upon two experimental supports, galactic red shift and the

cosmic microwave background. Both are produced by dark matter, shown here to be

hydrogen dominated aggregates with a few percent of helium nodules. Scattering

from these non-radiating intergalactic masses produce a red shift that normally

correlates with distance. Warmed by our galaxy to an Eigenvalue of 2.735 K,

drawn near the Earth, these bodies, kept cold by ablation, resonance radiate

the Planckian microwave signal. Several tests are proposed that will

distinguish between this model and the big bang.

\\ ( http://arxiv.org/abs/0803.3604 , 325kb)

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Supplementary Information to the paper ``Breakdown of the adiabatic limit in low

dimensional gapless systems''

Authors: A. Polkovnikov, V. Gritsev

(Submitted on 27 Mar 2008)

Abstract: Here we give detailed derivations and provide additional examples

to the main paper: arXiv:0706.0212. In particular, we discuss the scaling

behavior of observables like correlation functions and density of excitations.

We also analyze effects of nonintegrability of the Bose-Hubbard model on the

long-time dynamics of the correlation functions. In addition we explicitly

consider several interacting models, where we are able to analyze slow dynamics

and classify it according to the regimes suggested in the main paper.

Comments: 11 pages, 6 figures. The current version of the main paper

arXiv:0706.0212 is not up to date according to the Nature Physics editorial policy

Subjects: Statistical Mechanics (cond-mat.stat-mech); Mesoscopic Systems and

Quantum Hall Effect (cond-mat.mes-hall); Strongly Correlated Electrons

(cond-mat.str-el)

Cite as: arXiv:0803.3967v1 [cond-mat.stat-mech]

http://au.arxiv.org/abs/0803.3967

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Quantum fluctuations, temperature and detuning effects in solid-light systems

Authors: Markus Aichhorn, Martin Hohenadler, Charles Tahan, Peter B. Littlewood

(Submitted on 27 Mar 2008)

Abstract: The superfluid to Mott insulator transition in cavity polariton

arrays is analyzed using the variational cluster approach, taking into account

quantum fluctuations exactly on finite length scales. Phase diagrams in one and

two dimensions exhibit important non-mean-field features. Single-particle

excitation spectra in the Mott phase are dominated by particle and hole bands

separated by a Mott gap. In contrast to Bose-Hubbard models, detuning allows for

changing the nature of the bosonic particles from quasi-localized excitons to

polaritons to weakly interacting photons. The Mott state with density one exists

up to temperatures $T/g\gtrsim0.03$, implying experimentally accessible

temperatures for realistic cavity couplings $g$.

Comments: 5 pages, 4 figures

Subjects: Other (cond-mat.other)

Cite as: arXiv:0803.3963v1 [cond-mat.other]

http://arxiv.org/abs/0803.3963

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The effects of next to nearest neighbor hopping on Bose-Einstein condensation in

cubic lattices

Authors: G. K. Chaudhary, R. Ramakumar

(Submitted on 27 Mar 2008 (v1), last revised 1 Apr 2008 (this version, v2))

Abstract: In this brief report, we present results of our calculations on

the effects of next to nearest neighbor boson hopping ($t^{\prime}$) energy on

Bose-Einstein condensation in cubic lattices. We consider both non-interacting

and repulsively interacting bosons moving in the lowest Bloch band. The

interacting bosons are studied making use of the Bogoliubov method. We find that

the bose condensation temperature is enhanced with increasing $t^{\prime}$ for

bosons in a simple cubic (sc) lattice and decreases for bosons in body-centered

cubic (bcc) and face-centered cubic (fcc) lattices. We also find that

interaction induced depletion of the condensate is reduced for bosons in a sc

lattice while is enhanced for bosons in bcc and fcc lattices.

Comments: 4 pages including 6 figures, typos corrected

Subjects: Statistical Mechanics (cond-mat.stat-mech); Other (cond-mat.other)

Cite as: arXiv:0803.3888v2 [cond-mat.stat-mech]

http://arxiv.org/abs/0803.3888

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Quantum Control of Ultra-cold Atoms: Uncovering a Novel Connection between Two

Paradigms of Quantum Nonlinear Dynamics

Authors: Jiao Wang, Anders S. Mouritzen, Jiangbin Gong (National. Univ. of

Singapore)

(Submitted on 27 Mar 2008)

Abstract: Controlling the translational motion of cold atoms using optical

lattice potentials is of both theoretical and experimental interest. By

designing two on-resonance time sequences of kicking optical lattice potentials,

a novel connection between two paradigms of nonlinear mapping systems, i.e., the

kicked rotor model and the kicked Harper model, is established. In particular,

it is shown that Hofstadter's butterfly quasi-energy spectrum in periodically

driven quantum systems may soon be realized experimentally, with the effective

Planck constant tunable by varying the time delay between two sequences of

control fields. Extensions of this study are also discussed. The results are

intended to open up a new generation of cold-atom experiments of quantum

nonlinear dynamics

Comments: submitted to the special issue of "Quantum Control of Matter and

Light", Journal of Modern Optics

Subjects: Quantum Physics (quant-ph); Chaotic Dynamics (nlin.CD)

Cite as: arXiv:0803.3859v1 [quant-ph]

http://arxiv.org/abs/0803.3859

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The replacments:

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arXiv:0705.2569

replaced with revised version Mon, 24 Mar 2008 16:22:52 GMT (919kb)

Title: Fully permanent magnet atom chip for Bose-Einstein condensation

Authors: T. Fernholz, R. Gerritsma, S. Whitlock, I. Barb, R. J. C. Spreeuw

Categories: cond-mat.other

Comments: changed title, substantial text modifications, journal reference

added

Journal-ref: Phys. Rev. A 77, 033409 (2008)

DOI: 10.1103/PhysRevA.77.033409

\\ ( http://arxiv.org/abs/0705.2569 , 919kb)

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arXiv:0709.2143

replaced with revised version Mon, 24 Mar 2008 16:52:50 GMT (236kb)

Title: Optimized Double-well quantum interferometry with Gaussian

squeezed-states

Authors: Y. P. Huang and M. G. Moore

Categories: quant-ph

Comments: updated version

\\ ( http://arxiv.org/abs/0709.2143 , 236kb)

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arXiv:0709.2144

replaced with revised version Mon, 24 Mar 2008 16:49:41 GMT (105kb)

Title: On-demand generation of entanglement of atomic qubits via optical

interferometry

Authors: Y. P. Huang and M. G. Moore

Categories: quant-ph

Comments: To be published in PRA

\\ ( http://arxiv.org/abs/0709.2144 , 105kb)

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arXiv:cond-mat/0701502

replaced with revised version Tue, 25 Mar 2008 01:19:05 GMT (169kb)

Title: Quantum dynamics of repulsively bound atom pairs in the Bose-Hubbard

model

Authors: Li Wang, Yajiang Hao, Shu Chen

Categories: cond-mat.other

Comments: 7 pages, 6 figures, significant changes made

\\ ( http://arxiv.org/abs/cond-mat/0701502 , 169kb)

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arXiv:0801.4858

replaced with revised version Tue, 25 Mar 2008 09:51:38 GMT (313kb)

Title: Density Correlations in Cold Atomic Gases: Atomic Speckles in the

Presence of Disorder

Authors: P. Henseler and B. Shapiro

Categories: cond-mat.dis-nn cond-mat.mes-hall

Comments: 8 pages, 2 figures

Journal-ref: Phys. Rev. A 77, 033624 (2008)

\\ ( http://arxiv.org/abs/0801.4858 , 313kb)

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arXiv:cond-mat/0605412

replaced with revised version Wed, 26 Mar 2008 12:46:35 GMT (592kb)

Title: Solitons in coupled atomic-molecular Bose-Einstein condensates in a trap

Authors: B. Oles and K. Sacha

Categories: cond-mat.other cond-mat.stat-mech

Comments: 7 pages, 7 figures, published version

Journal-ref: J. Phys. B: At. Mol. Opt. Phys. 40 (2007) 1103-1116

\\ ( http://arxiv.org/abs/cond-mat/0605412 , 592kb)

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arXiv:cond-mat/0701212

replaced with revised version Wed, 26 Mar 2008 13:01:35 GMT (214kb)

Title: N-conserving Bogoliubov vacuum of a two component Bose-Einstein

condensate: Density fluctuations close to a phase separation condition

Authors: Bartlomiej Oles, Krzysztof Sacha

Categories: cond-mat.other

Comments: 12 pages, 5 figures, published version

Journal-ref: J. Phys. A: Math. Theor. 41 (2008) 145005

\\ ( http://arxiv.org/abs/cond-mat/0701212 , 214kb)

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arXiv:0711.3939 (*cross-listing*)

replaced with revised version Wed, 26 Mar 2008 02:40:32 GMT (539kb)

Title: Proposal of a Cold-atom Realization of Quantum Maps with Hofstadter's

Butterfly Spectrum

Authors: Jiao Wang and Jiangbin Gong (National Univ. of Singapore)

Categories: quant-ph cond-mat.other nlin.CD

Comments: 5 pages, 4 figures, minor changes, to appear in Phys. Rev. A (Rapid

Communication)

\\ ( http://arxiv.org/abs/0711.3939 , 539kb)

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Till next time,

Matt.

-- ========================================================================= Dr M. J. Davis, Senior Lecturer in Physics School of Physical Sciences, email: mdavis_at_physics.uq.edu.au University of Queensland, ph : +61 7 334 69824 Brisbane, QLD 4072, fax : +61 7 336 51242 Australia. http://www.physics.uq.edu.au/people/mdavis/ ========================================================================= Matt's arXiv selection: weekly summary of cold-atom papers from arXiv.org http://www.physics.uq.edu.au/people/mdavis/matts_arXiv/ ========================================================================= Legal stuff: Unless stated otherwise, this e-mail represents only the views of the sender and not the views of the University of Queensland =========================================================================Received on Thu Apr 10 2008 - 09:27:39 EST

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