Matt's arXiv selection: week ending 1 February 2008.

From: Matthew Davis <>
Date: Mon, 04 Feb 2008 10:45:06 +1000

The following message was sent to the matts_arxiv list by Matthew Davis <>

Hi everyone,

There are 19 new preprints and 12 replacements this week:

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.
\\ ( , 31kb)
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.
\\ ( , 12kb)
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.
\\ ( , 121kb)
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.
\\ ( , 141kb)
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.
\\ ( , 59kb)
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.
\\ ( , 392kb)
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.
\\ ( , 96kb)
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
   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.
\\ ( , 1000kb)
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.
\\ ( , 496kb)
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.
\\ ( , 860kb)
Date: Tue, 29 Jan 2008 10:17:17 GMT (43kb)

Title: Ground-state reference systems for expanding correlated fermions in one
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.
\\ ( , 43kb)
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.
\\ ( , 301kb)
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.
\\ ( , 199kb)
Date: Tue, 29 Jan 2008 22:56:10 GMT (14kb)

Title: The Josephson relation for the superfluid density in the BCS-BEC
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.
\\ ( , 14kb)
Date: Wed, 30 Jan 2008 13:30:17 GMT (508kb)

Title: Spectral weight redistribution in strongly correlated bosons in optical
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.
\\ ( , 508kb)
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.
\\ ( , 103kb)
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.
\\ ( , 312kb)
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.
\\ ( , 61kb)
Date: Thu, 31 Jan 2008 20:14:09 GMT (427kb,D)

Title: Pulsating instability of a Bose-Einstein condensate in an optical
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.
\\ ( , 427kb)
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.
\\ ( , 126kb)
Date: Thu, 31 Jan 2008 01:10:42 GMT (991kb)

Title: Inelastic collisions of ultra-cold heteronuclear molecules in an optical
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.
\\ ( , 991kb)
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
\\ ( , 95kb)

The replacements:

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

Title: Vortex Lattice Locking in Rotating Two-Component Bose-Einstein
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
\\ ( , 33kb)
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
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
\\ ( , 174kb)
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)
\\ ( , 46kb)
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
\\ ( , 42kb)
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
\\ ( , 123kb)
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
\\ ( , 622kb)
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
\\ ( , 785kb)
replaced with revised version Mon, 28 Jan 2008 11:21:44 GMT (50kb)

Title: Mixtures of strongly interacting ultracold bosonic atoms in optical
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
\\ ( , 50kb)
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
\\ ( , 311kb)
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
\\ ( , 298kb)
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
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
\\ ( , 431kb)
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
\\ ( , 179kb)
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
\\ ( , 113kb)
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
\\ ( , 222kb)
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
Categories: physics.atom-ph
Comments: 4 pages, 5 figures
\\ ( , 321kb)

Till next time,

Dr M. J. Davis,               Senior Lecturer in Physics
School of Physical Sciences,  email:
University of Queensland,     ph   : +61 7 334 69824
Brisbane, QLD 4072,           fax  : +61 7 336 51242
Matt's arXiv selection: weekly summary of cold-atom papers from
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