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

Date: Mon, 04 Feb 2008 10:45:06 +1000

Date: Mon, 04 Feb 2008 10:45:06 +1000

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

Hi everyone,

There are 19 new preprints and 12 replacements this week:

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arXiv:0801.3937

Date: Fri, 25 Jan 2008 12:48:14 GMT (31kb)

Title: Density matrix renormalization group approach of the spin-boson model

Authors: Hang Wong and Zhi-De Chen

Categories: cond-mat.str-el

Comments: 6 pages, 7 figures

\\

We propose a density matrix renormalization group approach to tackle a

two-state system coupled to a bosonic bath with continuous spectrum. In this

approach, the optimized phonon scheme is applied to several hundred phonon

modes which are divided linearly among the spectrum. Although DMRG cannot

resolve very small energy scales, the delocalized-localized transition points

of the two-state system are extracted by the extrapolation of the flow diagram

results. The phase diagram is compared with the numerical renormalization group

results and shows good agreement in both Ohmic and sub-Ohmic case.

\\ ( http://arxiv.org/abs/0801.3937 , 31kb)

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arXiv:0801.3984

Date: Fri, 25 Jan 2008 17:01:10 GMT (12kb)

Title: Effects of fluctuations in the superfluid-supersolid phase transition on

the lattice

Authors: Ralf Sch\"utzhold, Michael Uhlmann, Uwe R. Fischer

Categories: cond-mat.other

Comments: 4 pages of RevTex4

\\

We derive a controlled mean-field expansion for the extended Bose-Hubbard

model, involving interactions with many neighbors on an arbitrary periodic

lattice, and study the superfluid-supersolid phase transition. Near the

critical point, the impact of (thermal and quantum) fluctuations on top of the

mean field grows, which entails several striking effects, such as negative

superfluid densities and thermodynamic instability of the superfluid phase. We

also predict the existence of long-lived ``supercooled'' states with

anomalously large quantum fluctuations.

\\ ( http://arxiv.org/abs/0801.3984 , 12kb)

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arXiv:0801.4011

Date: Fri, 25 Jan 2008 18:44:34 GMT (121kb)

Title: Stability of Inhomogeneous Multi-Component Fermi Gases

Authors: D. Blume, Seth T. Rittenhouse, J. von Stecher, and Chris H. Greene

Categories: cond-mat.other

Comments: 15 pages, 8 figures

\\

Two-component equal-mass Fermi gases, in which unlike atoms interact through

a short-range two-body potential and like atoms do not interact, are stable

even when the interspecies s-wave scattering length becomes infinitely large.

Solving the many-body Schroedinger equation within a hyperspherical framework

and by Monte Carlo techniques, this paper investigates how the properties of

trapped two-component gases change if a third or fourth component are added. If

all interspecies scattering lengths are equal and negative, our calculations

suggest that both three- and four-component Fermi gases become unstable for a

certain critical set of parameters. The relevant length scale associated with

the collapse is set by the interspecies scattering length and we argue that the

collapse is, similar to the collapse of an attractive trapped Bose gas, a

many-body phenomenon. Furthermore, we consider a three-component Fermi gas in

which two interspecies scattering lengths are negative while the other

interspecies scattering length is zero. In this case, the stability of the

Fermi system is predicted to depend appreciably on the range of the underlying

two-body potential. We find parameter combinations for which the system appears

to become unstable for a finite negative scattering length and parameter

combinations for which the system appears to be made up of weakly-bound trimers

that consist of one fermion of each species.

\\ ( http://arxiv.org/abs/0801.4011 , 121kb)

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arXiv:0801.4000

Date: Fri, 25 Jan 2008 18:17:59 GMT (141kb)

Title: Self-trapping of impurities in Bose-Einstein condensates: Arbitrarily

strong attractive and repulsive coupling

Authors: M. Bruderer, W. Bao and D. Jaksch

Categories: quant-ph

Comments: 7 pages, 5 figures

\\

We study the interaction-induced localization, so-called self-trapping, of a

neutral impurity atom immersed in a homogeneous Bose-Einstein condensate (BEC).

Based on the Hartree description of the BEC we show that -- in contrast to

repulsive impurities -- attractive impurities have a singular ground state in

3d and shrink to a point-like state as the coupling approaches a critical value

in 2d. Moreover, we find that the density of the BEC increases markedly in the

vicinity of attractive impurities in 1d and 2d, which strongly enhances

inelastic collisions of the BEC atoms. These collisions result in a loss of BEC

atoms and possibly of the localized impurity itself.

\\ ( http://arxiv.org/abs/0801.4000 , 141kb)

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arXiv:0801.4193

Date: Mon, 28 Jan 2008 05:37:37 GMT (59kb)

Title: p-Wave superfluid and phase separation in atomic Bose-Fermi mixture

Authors: Kazunori Suzuki, Takahiko Miyakawa, and Toru Suzuki

Categories: cond-mat.supr-con

Comments: 7 pages, 6 figurs

\\

We consider a system of repulsively interacting Bose-Fermi mixtures of spin

polarized uniform atomic gases at zero temperature. We examine possible

realization of p-wave superfluidity of fermions due to an effective attractive

interaction via density fluctuations of Bose-Einstein condensate within

mean-field approximation. We find the ground state of the system by direct

energy comparison of p-wave superfluid and phase-separated states, and suggest

an occurrence of the p-wave superfluid for a strong boson-fermion interaction

regime. We study some signatures in the p-wave superfluid phase, such as

anisotropic energy gap and quasi-particle energy in the axial state, that have

not been observed in spin unpolarized superfluid of atomic fermions. We also

show that a Cooper pair is a tightly bound state like a diatomic molecule in

the strong boson-fermion coupling regime and suggest an observable indication

of the p-wave superfluid in the real experiment.

\\ ( http://arxiv.org/abs/0801.4193 , 59kb)

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arXiv:0801.4264

Date: Mon, 28 Jan 2008 13:18:14 GMT (392kb)

Title: Transporting cold atoms in optical lattices with ratchets: Symmetries

and Mechanisms

Authors: S. Denisov, S. Flach, and P. H\"anggi

Categories: cond-mat.stat-mech

Comments: 10 pages, 4 figures

\\

The objective of this work is to provide a general introduction into the

symmetry analysis of the rachet effect using a simple, non-interacting

one-particle dynamics. Despite its simplicity, this model contains all the

basic aspects of classical and quantum ratchet dynamics, and may be used also

as a starting point of incorporating atom-atom interactions.

\\ ( http://arxiv.org/abs/0801.4264 , 392kb)

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arXiv:0801.4302

Date: Mon, 28 Jan 2008 15:05:03 GMT (96kb)

Title: Nonlinear Schroedinger equation for a superfluid Bose gas from weak

coupling to unitarity: Study of vortices

Authors: Sadhan K. Adhikari, Luca Salasnich

Categories: cond-mat.soft

Comments: 10 pages, 15 figures

\\

We introduce a nonlinear Schroedinger equation to describe the dynamics of a

superfluid Bose gas in the crossover from the weak-coupling regime, where $a

n^{1/3}\ll 1$ with $a$ the inter-atomic s-wave scattering length and $n$ the

bosonic density, to the unitarity limit, where $a\to +\infty$. We call this

equation the {unitarity Schroedinger equation} (USE). The zero-temperature bulk

equation of state of this USE is parametrized by the Lee-Yang-Huang low-density

expansion and Jastrow calculations at unitarity. With the help of the USE we

study the profiles of quantized vortices and vortex-core radius in a uniform

Bose gas. We also consider quantized vortices in a Bose gas under

cylindrically-symmetric harmonic confinement and study their profile and

chemical potential using the USE and compare the results with those obtained

from the Gross-Pitaevskii-type equations valid in the weak-coupling limit.

Finally, the USE is applied to calculate the breathing modes of the confined

Bose gas as a function of the scattering length.

\\ ( http://arxiv.org/abs/0801.4302 , 96kb)

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arXiv:0801.4126

Date: Sun, 27 Jan 2008 11:43:57 GMT (1000kb,D)

Title: Non-Destructive Probing of Rabi Oscillations on the Cesium Clock

Transition near the Standard Quantum Limit

Authors: P. J. Windpassinger, D. Oblak, P. G. Petrov, M. Kubasik, M. Saffman,

C. L. Garrido Alzar, J. Appel, J. H. Mueller, N. Kjaergaard, E. S. Polzik

Categories: quant-ph

Comments: 4 pages, 4 figures, accepted for publication in Physical Review

Letters

\\

We report on non-destructive observation of Rabi oscillations on the Cs clock

transition. The internal atomic state evolution of a dipole-trapped ensemble of

cold atoms is inferred from the phase shift of a probe laser beam as measured

using a Mach-Zehnder interferometer. We describe a single color as well as a

two-color probing scheme. Using the latter, measurements of the collective

pseudo-spin projection of atoms in a superposition of the clock states are

performed and the observed spin fluctuations are shown to be close to the

standard quantum limit.

\\ ( http://arxiv.org/abs/0801.4126 , 1000kb)

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arXiv:0801.4042

Date: Fri, 25 Jan 2008 22:41:37 GMT (496kb)

Title: Stopping Supersonic Beams with an Atomic Coilgun

Authors: Edvardas Narevicius, Adam Libson, Christian G. Parthey, Isaac Chavez,

Julia Narevicius, Uzi Even and Mark G. Raizen

Categories: physics.atom-ph

\\

We report the stopping of an atomic beam, using a series of pulsed

electromagnetic coils. We use a supersonic beam of metastable neon created in a

gas discharge as a monochromatic source of paramagnetic atoms. A series of

coils is fired in a timed sequence to bring the atoms to near-rest, where they

are detected on a micro-channel plate. Applications to fundamental problems in

physics and chemistry are discussed.

\\ ( http://arxiv.org/abs/0801.4042 , 496kb)

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arXiv:0801.4344

Date: Mon, 28 Jan 2008 18:09:44 GMT (860kb)

Title: Sr lattice clock at 1x10^{-16} fractional uncertainty by remote optical

evaluation with a Ca clock

Authors: A. D. Ludlow, T. Zelevinsky, G. K. Campbell, S. Blatt, M. M. Boyd, M.

H. G. de Miranda, M. J. Martin, J. W. Thomsen, S. M. Foreman, and Jun Ye T.

M. Fortier, J. E. Stalnaker, S. A. Diddams, Y. Le Coq, Z. W. Barber, N. Poli,

N. D. Lemke, K. M. Beck, and C. W. Oates

Categories: physics.atom-ph physics.gen-ph

Comments: To be published in Science, 2008

\\

Optical atomic clocks promise timekeeping at the highest precision and

accuracy, owing to their high operating frequencies. Rigorous evaluations of

these clocks require direct comparisons between them. We have realized a

high-performance remote comparison of optical clocks over km-scale urban

distances, a key step for development, dissemination, and application of these

optical standards. Through this remote comparison and a proper design of

lattice-confined neutral atoms for clock operation, we evaluate the uncertainty

of a strontium (Sr) optical lattice clock at the 1x10-16 fractional level,

surpassing the best current evaluations of cesium (Cs) primary standards. We

also report on the observation of density-dependent effects in the

spin-polarized fermionic sample and discuss the current limiting effect of

blackbody radiation-induced frequency shifts.

\\ ( http://arxiv.org/abs/0801.4344 , 860kb)

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arXiv:0801.4454

Date: Tue, 29 Jan 2008 10:17:17 GMT (43kb)

Title: Ground-state reference systems for expanding correlated fermions in one

dimension

Authors: F. Heidrich-Meisner, M. Rigol, A. Muramatsu, A.E. Feiguin, E. Dagotto

Categories: cond-mat.str-el

Comments: 4 pages Revtex4, 4 eps-figures

\\

We study the sudden expansion of strongly correlated fermions in a

one-dimensional lattice, utilizing the time-dependent density-matrix

renormalization group method. Our focus is on the behavior of experimental

observables such as the density, the momentum distribution function, and the

density and spin structure factors. As our main result, we show that

correlations in the transient regime can be accurately described by equilibrium

reference systems. In addition, we find that the expansion from a Mott

insulator produces distinctive peaks in the momentum distribution function at

|k| ~ pi/2, accompanied by the onset of power-law correlations.

\\ ( http://arxiv.org/abs/0801.4454 , 43kb)

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arXiv:0801.4466

Date: Tue, 29 Jan 2008 11:39:53 GMT (301kb)

Title: 2PI nonequilibrium versus transport equations for an ultracold Bose gas

Authors: Alexander Bransch\"adel and Thomas Gasenzer

Categories: cond-mat.other

Comments: 24 pages, 7 figures

Report-no: Heidelberg preprint HD-THEP-08-02

\\

The far-from-equilibrium dynamics of an ultracold, one-dimensional Bose gas

is studied. The focus is set on the comparison between the solutions of fully

dynamical evolution equations derived from the 2PI effective action and their

corresponding kinetic approximation in the form of Boltzmann-type transport

equations. It is shown that during the time evolution of the gas a kinetic

description which includes non-Markovian memory effects in a gradient expansion

becomes valid. The time scale at which this occurs is shown to exceed

significantly the time scale at which the system's evolution enters a

near-equilibrium drift period where a fluctuation dissipation relation is found

to hold and which would seem to be predestined for the kinetic approximation.

\\ ( http://arxiv.org/abs/0801.4466 , 301kb)

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arXiv:0801.4490

Date: Tue, 29 Jan 2008 13:15:11 GMT (199kb)

Title: Fidelity decay in trapped Bose-Einstein condensates

Authors: G. Manfredi, P.-A. Hervieux

Categories: quant-ph

Comments: 4 pages, to appear in Physical Review Letters, February 2008

\\

The quantum coherence of a Bose-Einstein condensate is studied using the

concept of quantum fidelity (Loschmidt echo). The condensate is confined in an

elongated anharmonic trap and subjected to a small random potential such as

that created by a laser speckle. Numerical experiments show that the quantum

fidelity stays constant until a critical time, after which it drops abruptly

over a single trap oscillation period. The critical time depends

logarithmically on the number of condensed atoms and on the perturbation

amplitude. This behavior may be observable by measuring the interference

fringes of two condensates evolving in slightly different potentials.

\\ ( http://arxiv.org/abs/0801.4490 , 199kb)

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arXiv:0801.4579

Date: Tue, 29 Jan 2008 22:56:10 GMT (14kb)

Title: The Josephson relation for the superfluid density in the BCS-BEC

crossover

Authors: Edward Taylor

Categories: cond-mat.other

Comments: 8 pages

\\

The Josephson relation for the superfluid density is derived for a Fermi

superfluid in the BCS-BEC crossover. This new identity extends the original

Josephson relation for Bose superfluids. It gives a simple exact relation

between the superfluid density $\rho_s$ and the broken-symmetry Cooper pair

order parameter $\Delta_0$ in terms of the infrared limit of the Cooper pair

propagator. The same expression holds through the entire BCS-BEC crossover,

describing the superfluid density of a weak-coupling BCS superfluid as well as

the superfluid density of a Bose condensate of dimer molecules.

\\ ( http://arxiv.org/abs/0801.4579 , 14kb)

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arXiv:0801.4672

Date: Wed, 30 Jan 2008 13:30:17 GMT (508kb)

Title: Spectral weight redistribution in strongly correlated bosons in optical

lattices

Authors: Chiara Menotti and Nandini Trivedi

Categories: cond-mat.other

Comments: 14 pages, 12 figures

\\

We calculate the single-particle spectral function for the one-band

Bose-Hubbard model within the random phase approximation (RPA). In the strongly

correlated superfluid, in addition to the gapless phonon excitations, we find

extra gapped modes which become particularly relevant near the superfluid-Mott

quantum phase transition (QPT). The strength in one of the gapped modes, a

precursor of the Mott phase, grows as the QPT is approached and evolves into a

hole (particle) excitation in the Mott insulator depending on whether the

chemical potential is above (below) the tip of the lobe. The sound velocity of

the Goldstone modes remains finite when the transition is approached at a

constant density, otherwise, it vanishes at the transition. It agrees well with

Bogoliubov theory except close to the transition. We also calculate the spatial

correlations for bosons in an inhomogeneous trapping potential creating

alternating shells of Mott insulator and superfluid. Finally, we discuss the

capability of the RPA approximation to correctly account for quantum

fluctuations in the vicinity of the QPT.

\\ ( http://arxiv.org/abs/0801.4672 , 508kb)

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arXiv:0801.4856

Date: Thu, 31 Jan 2008 12:38:13 GMT (103kb)

Title: Quantum Hall physics in rotating Bose-Einstein condensates

Authors: Susanne Viefers

Categories: cond-mat.mes-hall

Comments: Topical review; to appear in Journal of Physics: Condensed Matter. 28

pages, 6 figures

Report-no: OSLO-TP 1-08

\\

The close theoretical analogy between the physics of rapidly rotating atomic

Bose condensates and the quantum Hall effect (i.e., a two dimensional electron

gas in a strong magnetic field) was first pointed out ten years ago. As a

consequence of this analogy, a large number of strongly correlated quantum

Hall-type states have been predicted to occur in rotating Bose systems, and

suggestions have been made how to manipulate and observe their fractional

quasiparticle excitations. Due to a very rapid development in experimental

techniques over the past years, experiments on BEC now appear to be close to

reaching the quantum Hall regime. This paper reviews the theoretical and

experimental work done to date in exploring quantum Hall physics in cold

bosonic gases. Future perspectives are discussed briefly, in particular the

idea of exploiting some of these strongly correlated states in the context of

topological quantum computing.

\\ ( http://arxiv.org/abs/0801.4856 , 103kb)

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arXiv:0801.4858

Date: Thu, 31 Jan 2008 12:43:50 GMT (312kb)

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

\\

The phenomenon of random intensity patterns, for waves propagating in the

presence of disorder, is well known in optics and in mesoscopic physics. We

study this phenomenon for cold atomic gases expanding, by a diffusion process,

in a weak random potential. We show that the density-density correlation

function of the expanding gas is strongly affected by disorder and we estimate

the typical size of a speckle spot, i.e., a region of enhanced or depleted

density. Both a Fermi gas and a Bose-Einstein condensate (in a mean field

approach) are considered.

\\ ( http://arxiv.org/abs/0801.4858 , 312kb)

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arXiv:0801.4909

Date: Thu, 31 Jan 2008 16:05:45 GMT (61kb)

Title: Optical Lattices: Theory

Authors: A. Smerzi and A. Trombettoni

Categories: cond-mat.stat-mech

Comments: Chapter 13 in Part VIII: "Optical Lattices" of "Emergent Nonlinear

Phenomena in Bose-Einstein Condensates: Theory and Experiment," edited by P.

G. Kevrekidis, D. J. Frantzeskakis, and R. Carretero-Gonzalez (Springer

Series on Atomic, Optical, and Plasma Physics, 2007) - pages 247-265

\\

This chapter presents an overview of the properties of a Bose-Einstein

condensate (BEC) trapped in a periodic potential. This system has attracted a

wide interest in the last years, and a few excellent reviews of the field have

already appeared in the literature (see, for instance, [1-3] and references

therein). For this reason, and because of the huge amount of published results,

we do not pretend here to be comprehensive, but we will be content to provide a

flavor of the richness of this subject, together with some useful references.

On the other hand, there are good reasons for our effort. Probably, the most

significant is that BEC in periodic potentials is a truly interdisciplinary

problem, with obvious connections with electrons in crystal lattices, polarons

and photons in optical fibers. Moreover, the BEC experimentalists have reached

such a high level of accuracy to create in the lab, so to speak, paradigmatic

Hamiltonians, which were first introduced as idealized theoretical models to

study, among others, dynamical instabilities or quantum phase transitions.

\\ ( http://arxiv.org/abs/0801.4909 , 61kb)

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arXiv:0801.4964

Date: Thu, 31 Jan 2008 20:14:09 GMT (427kb,D)

Title: Pulsating instability of a Bose-Einstein condensate in an optical

lattice

Authors: Uttam Shrestha, Marijan Kostrun, and Juha Javanainen

Categories: cond-mat.other

\\

We find numerically that in the limit of weak atom-atom interactions a

Bose-Einstein condensate in an optical lattice may develop a pulsating

dynamical instability in which the atoms nearly periodically form a peak in the

occupation numbers of the lattice sites, and then return to the unstable

initial state. Multiple peaks behaving similarly may also occur. Simple

arguments show that the pulsating instability is a remnant of integrability,

and give a handle on the relevant physical scales.

\\ ( http://arxiv.org/abs/0801.4964 , 427kb)

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arXiv:0801.4771

Date: Wed, 30 Jan 2008 21:37:41 GMT (126kb,D)

Title: Self-organization of a Bose-Einstein condensate in an optical cavity

Authors: D. Nagy, G. Szirmai, P. Domokos

Categories: quant-ph

Comments: 11 pages

\\

The spatial self-organization of a Bose-Einstein condensate (BEC) in a

high-finesse linear optical cavity is discussed. The condensate atoms are

laser-driven from the side and scatter photons into the cavity. Above a

critical pump intensity the homogeneous condensate evolves into a stable

pattern bound by the cavity field. The transition point is determined

analytically from a mean-field theory. We calculate the lowest lying Bogoliubov

excitations of the coupled BEC-cavity system and the quantum depletion due to

the atom-field coupling.

\\ ( http://arxiv.org/abs/0801.4771 , 126kb)

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arXiv:0801.4804

Date: Thu, 31 Jan 2008 01:10:42 GMT (991kb)

Title: Inelastic collisions of ultra-cold heteronuclear molecules in an optical

trap

Authors: Eric R. Hudson, Nathan B. Gilfoy, Svetlana Kotochigova, Jeremy M.

Sage, and David DeMille

Categories: physics.atom-ph physics.chem-ph

\\

Ultra-cold RbCs molecules in high-lying vibrational levels of the

a$^3\Sigma^+$ ground electronic state are confined in an optical trap.

Inelastic collision rates of these molecules with both Rb and Cs atoms are

determined for individual vibrational levels, across an order of magnitude of

binding energies. A simple model for the collision process is shown to

accurately reproduce the observed scattering rates.

\\ ( http://arxiv.org/abs/0801.4804 , 991kb)

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arXiv:0801.4951

Date: Thu, 31 Jan 2008 18:57:48 GMT (95kb,D)

Title: Recoil Free Scattering From a Free Gas

Authors: Scott N. Sanders (1), Florian Mintert (2 and 3), Eric J. Heller (3)

((1) Massachusetts Institute of Technology, (2) Albert-Ludwigs-Universit\"at

Freiburg, (3) Harvard University)

Categories: physics.atom-ph

Comments: 9 pages, 2 figures

\\

We present a treatment of decoherence in an atom due to scattering from a gas

of free particles. We show that there is a recoil free scattering process that

leaves both the atom and the gas in an unchanged state, but allows for the

acquisition of a phase shift that remains in the free space limit. This is

essential to understanding decoherence in a separated arm atom interferometer,

where a gas of atoms forms a refractive medium for a matter wave. Our work

clarifies the extent to which scattering of a free particle acts as a which-way

measurement.

\\ ( http://arxiv.org/abs/0801.4951 , 95kb)

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The replacements:

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arXiv:0705.2426

replaced with revised version Thu, 24 Jan 2008 22:11:29 GMT (33kb)

Title: Vortex Lattice Locking in Rotating Two-Component Bose-Einstein

Condensates

Authors: Ryan Barnett, Gil Refael, Mason A. Porter, Hans Peter Buchler

Categories: cond-mat.str-el cond-mat.mes-hall nlin.PS physics.atom-ph

Comments: 6 pages, 2 figures

\\ ( http://arxiv.org/abs/0705.2426 , 33kb)

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arXiv:0709.2934

replaced with revised version Fri, 25 Jan 2008 02:32:32 GMT (174kb)

Title: Quantum Hall Transition near a Fermion Feshbach Resonance in a Rotating

Trap

Authors: Kun Yang and Hui Zhai

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

Comments: slightly modified version as appeared in print

Journal-ref: Phys. Rev. Lett. 100, 030404 (2008)

DOI: 10.1103/PhysRevLett.100.030404

\\ ( http://arxiv.org/abs/0709.2934 , 174kb)

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arXiv:cond-mat/0701251

replaced with revised version Fri, 25 Jan 2008 21:19:39 GMT (46kb)

Title: The Shear Viscosity to Entropy Density Ratio of Trapped Fermions in the

Unitarity Limit

Authors: Thomas Schaefer (North Carolina State University)

Categories: cond-mat.other hep-ph nucl-th

Comments: published version

Journal-ref: Phys. Rev. A 76, 063618 (2007)

\\ ( http://arxiv.org/abs/cond-mat/0701251 , 46kb)

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arXiv:0706.1297

replaced with revised version Mon, 28 Jan 2008 09:38:10 GMT (42kb)

Title: Lattice bosons in quartic confinement

Authors: R. Ramakumar and A. N. Das

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

Comments: revised version, 11 pages including figures, accepted in EPJD

\\ ( http://arxiv.org/abs/0706.1297 , 42kb)

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arXiv:0707.2435

replaced with revised version Mon, 28 Jan 2008 19:05:25 GMT (123kb)

Title: Effective mean-field equations for cigar-shaped and disk-shaped

Bose-Einstein condensates

Authors: A. Mu\~noz Mateo and V. Delgado (Univ. de La Laguna)

Categories: cond-mat.other

Comments: 11 pages, 7 figures; Final version published in Phys. Rev. A;

Manuscript put in the archive and submitted to Phys. Rev. A on 17 July 2007

Journal-ref: Phys. Rev. A 77, 013617 (2008)

DOI: 10.1103/PhysRevA.77.013617

\\ ( http://arxiv.org/abs/0707.2435 , 123kb)

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arXiv:0708.2196

replaced with revised version Sun, 27 Jan 2008 18:00:50 GMT (622kb)

Title: Superfluid properties of a Bose-Einstein condensate in an optical

lattice confined in a cavity

Authors: Aranya B. Bhattacherjee

Categories: cond-mat.stat-mech

Comments: 12 pages, 10 figures, Accepted for Publication in Optics

Communication 2008

\\ ( http://arxiv.org/abs/0708.2196 , 622kb)

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arXiv:0712.1445

replaced with revised version Mon, 28 Jan 2008 07:21:30 GMT (785kb,D)

Title: Universal Thermodynamics of a Strongly Interacting Molecular Condensate

Authors: Yasuhisa Inada, Munekazu Horikoshi, Shuta Nakajima, Makoto

Kuwata-Gonokami, Masahito Ueda and Takashi Mukaiyama

Categories: cond-mat.other

\\ ( http://arxiv.org/abs/0712.1445 , 785kb)

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arXiv:0801.3465

replaced with revised version Mon, 28 Jan 2008 11:21:44 GMT (50kb)

Title: Mixtures of strongly interacting ultracold bosonic atoms in optical

lattices

Authors: P. Buonsante, S.M. Giampaolo, F. Illuminati, V. Penna and A. Vezzani

Categories: cond-mat.other quant-ph

Comments: 5 pages, 3 figures; corrected typo in authors' list

\\ ( http://arxiv.org/abs/0801.3465 , 50kb)

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arXiv:0708.1743

replaced with revised version Mon, 28 Jan 2008 15:34:42 GMT (311kb)

Title: Production of long-lived atomic vapor inside high-density buffer gas

Authors: A. O. Sushkov, D. Budker

Categories: physics.atom-ph

Comments: Some minor editorial changes and corrections, added references

\\ ( http://arxiv.org/abs/0708.1743 , 311kb)

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arXiv:0706.2781

replaced with revised version Tue, 29 Jan 2008 13:13:48 GMT (298kb)

Title: Degenerate Bose-Bose mixture in a three-dimensional optical lattice

Authors: J. Catani, L. De Sarlo, G. Barontini, F. Minardi and M. Inguscio

Categories: cond-mat.other

Comments: 5 pages, 4 figures

Journal-ref: Phys. Rev. A 77, 011603(R) (2008)

DOI: 10.1103/PhysRevA.77.011603

\\ ( http://arxiv.org/abs/0706.2781 , 298kb)

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arXiv:0709.3163

replaced with revised version Tue, 29 Jan 2008 16:36:35 GMT (431kb)

Title: Few-boson dynamics in double wells: From single-atom to correlated-pair

tunneling

Authors: Sascha Z\"ollner, Hans-Dieter Meyer and Peter Schmelcher

Categories: cond-mat.other quant-ph

Comments: small revision changes; shortened

Journal-ref: Phys. Rev. Lett. 100, 040401 (2008)

DOI: 10.1103/PhysRevLett.100.040401

\\ ( http://arxiv.org/abs/0709.3163 , 431kb)

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\\

arXiv:0706.1903

replaced with revised version Tue, 29 Jan 2008 17:47:37 GMT (179kb)

Title: Ultra-cold atoms in an optical cavity: two-mode laser locking to the

cavity avoiding radiation pressure

Authors: Simone Bux, Gordon Krenz, Sebastian Slama, Claus Zimmermann, Philippe

W. Courteille

Categories: physics.atom-ph physics.optics

Comments: 7 pages, 7 figures

Journal-ref: Appl. Phys. B 89, 181 (2007), 6 pages

DOI: 10.1007/s00340-007-2793-5

\\ ( http://arxiv.org/abs/0706.1903 , 179kb)

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arXiv:quant-ph/0604165

replaced with revised version Wed, 30 Jan 2008 06:27:56 GMT (113kb)

Title: Entanglement of orbital angular momentum states between an ensemble of

cold atoms and a photon

Authors: R. Inoue, N. Kanai, T. Yonehara, Y. Miyamoto, M. Koashi and M. Kozuma

Categories: quant-ph

Comments: 5 pages, 3 figures

Journal-ref: Phys. Rev. A 74, 053809 (2006)

DOI: 10.1103/PhysRevA.74.053809

\\ ( http://arxiv.org/abs/quant-ph/0604165 , 113kb)

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arXiv:0708.3265

replaced with revised version Thu, 31 Jan 2008 15:52:37 GMT (222kb)

Title: Ground and excited-state fermions in a 1D double-well, exact and

density-functional solutions

Authors: R. J. Magyar

Categories: cond-mat.other cond-mat.mtrl-sci

\\ ( http://arxiv.org/abs/0708.3265 , 222kb)

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arXiv:0711.4321

replaced with revised version Wed, 30 Jan 2008 12:52:24 GMT (321kb)

Title: Rabi oscillations and excitation trapping in the coherent excitation of

a mesoscopic frozen Rydberg gas

Authors: Markus Reetz-Lamour, Thomas Amthor, Johannes Deiglmayr, Matthias

Weidem\"uller

Categories: physics.atom-ph

Comments: 4 pages, 5 figures

\\ ( http://arxiv.org/abs/0711.4321 , 321kb)

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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 Mon Feb 04 2008 - 12:06:21 EST

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