Matt's arXiv selection: week ending 29 August 2008

From: Matthew Davis <>
Date: Tue, 23 Sep 2008 21:03:28 +1000

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

Hello again,

This week there were 25 new preprints and 17 replacements.

Date: Fri, 22 Aug 2008 14:49:28 GMT (71kb)

Title: Complex Cooperative Behaviour in Range-free Frustrated Many-body Systems
Authors: David Sherrington
Categories: cond-mat.dis-nn
Comments: Submitted for Proceedings of Conference in honour of CN Yang's 85th
   A brief introduction and overview is given of the complexity that is possible
and the challenges its study poses in many-body systems in which spatial
dimension is irrelevant and naively one might have expected trivial behaviour.
\\ ( , 71kb)
Date: Fri, 22 Aug 2008 22:21:48 GMT (138kb)

Title: Can Matter Wave Interferometer Detect Translational Speed?
Authors: Ruyong Wang, Yi Zheng and Aiping Yao
Categories: quant-ph
Comments: 5 pages, 3 figures
   Based only on the Galilean addition of velocities and the de Broglie
relation, it is deduced that in a matter wave interferometer with slow speed
particles, a moving segment of DeltaL with a velocity V contributes DeltaPhi =
(2Pi/vLamda)VdotDeltaL to the total phase difference of the interferometer,
where v is the speed of the particles and Lamda is the wavelength. This
expression is exactly the same as the generalized Sagnac effect for light waves
found by experiments except that v is replaced by c. For a rotational motion,
it leads to the Sagnac effect. More importantly, the scientific value of this
relationship is upon exploring the possibility of detecting translation speeds
by a matter wave interferometer. Two configurations of the experimental setup
have been indicated. If the possibility is confirmed by experiments, the
conclusion will be that there is a preferred reference frame for matter waves.
\\ ( , 138kb)
Date: Mon, 25 Aug 2008 01:34:59 GMT (26kb)

Title: First-order quantum correction to the ground-state energy density of
   two-dimensional hard-sphere Bose atoms
Authors: Sang-Hoon Kim, Mukunda P. Das
Categories: cond-mat.stat-mech
Comments: 9 pages, 3 figures,
   Divergence exponents of the first-order quantum correction of a
two-dimensional hard-sphere Bose atoms are obtained by an effective field
theory method. The first-order correction to the ground-state energy density
with respect to the zeroth-order is given by
   $\cale_1/\cale_0 \sim |D-2|^{-\al}|\ln\gamma|^{-\al'}$, where $D$ is the
spatial dimension, and $\gamma$ is the gas parameter ($\gamma=n a^D$). As $D
\to 2$, $\al =\al'=1$. We show that the first-order quantum correction of the
energy density is not perturbative in low dimensions of $D < 2.2$ regardless of
any gas parameter which is much less that 1.
\\ ( , 26kb)
Date: Mon, 25 Aug 2008 08:31:05 GMT (185kb)

Title: Magnetization of a half-quantum vortex in a spinor Bose-Einstein
Authors: Shoichi Hoshi and Hiroki Saito
Categories: cond-mat.other
Comments: 6 pages, 3 figures
   Magnetization dynamics of a half-quantum vortex in a spin-1 Bose-Einstein
condensate with a ferromagnetic interaction are investigated by mean-field and
Bogoliubov analyses. The transverse magnetization is shown to break the
axisymmetry and form threefold domains. This phenomenon originates from the
topological structure of the half-quantum vortex and spin conservation.
\\ ( , 185kb)
Date: Mon, 25 Aug 2008 09:49:39 GMT (72kb)

Title: Supersolids in one dimensional Bose Fermi mixtures
Authors: Frederic Hebert, George G. Batrouni, Xavier Roy, Valery G. Rousseau
Categories: cond-mat.other cond-mat.stat-mech
   Using quantum Monte Carlo simulations, we study a mixture of bosons and
fermions loaded on an optical lattice. With simple on-site repulsive
interactions, this system can be driven into a solid phase. We dope this phase
and, in analogy with pure bosonic systems, identify the conditions under which
the bosons enter a supersolid phase, i.e., exhibiting at the same time charge
density wave and superfluid order. We perform finite size scaling analysis to
confirm the presence of a supersolid phase and discuss its properties, showing
that it is a collective phase that also involve phase coherence of the
\\ ( , 72kb)
Date: Mon, 25 Aug 2008 16:16:09 GMT (269kb,D)

Title: Space-time sensors using multiple-wave atom interferometry
Authors: F. Impens and Ch. J. Bord\'e
Categories: physics.atom-ph
Comments: 4 pages, 4 figures
   We propose a space-time sensor based on a succession of levitating
Bord\'e-Ramsey interferometers set in a vertical configuration. The sample is
coherently trapped in the longitudinal momentum space thanks to a multiple wave
interference phenomenon. The system constitutes a matter-wave resonator in
momentum space, whose set of resonance conditions yields a promising
sensitivity in both the inertial and the frequency domain.
\\ ( , 269kb)
Date: Mon, 25 Aug 2008 13:49:03 GMT (799kb)

Title: Power-dependent shaping of vortex solitons in optical lattices with
   spatially modulated nonlinear refractive index
Authors: Yaroslav V. Kartashov, Victor A. Vysloukh, Lluis Torner
Categories: physics.optics
Comments: 11 pages, 3 figures, to appear in Optics Letters
   We address vortex solitons supported by optical lattices featuring modulation
of both the linear and nonlinear refractive indices. We find that when the
modulation is out-of-phase the competition between both effects results in
remarkable shape transformations of the solitons which profoundly affect their
properties and stability. Nonlinear refractive index modulation is found to
impose restrictions on the maximal power of off-site solitons, which are shown
to be stable only below a maximum nonlinearity modulation depth.
\\ ( , 799kb)
Date: Tue, 26 Aug 2008 16:55:03 GMT (686kb,D)

Title: Dynamical thermalization and vortex formation in stirred 2D
   Bose-Einstein condensates
Authors: T. M. Wright, R. J. Ballagh, A. S. Bradley, P. B. Blakie, and C. W.
Categories: cond-mat.other
Comments: 22 pages, 15 figures
   We present a quantum mechanical treatment of the mechanical stirring of
Bose-Einstein condensates using classical field techniques. In our approach the
condensate and excited modes are described using a Hamiltonian classical field
method in which the atom number and (rotating frame) energy are strictly
conserved. We simulate a T = 0 quasi-2D condensate perturbed by a rotating
anisotropic trapping potential. Vacuum fluctuations in the initial state
provide an irreducible mechanism for breaking the initial symmetries of the
condensate and seeding the subsequent dynamical instability. Highly turbulent
motion develops and we quantify the emergence of a rotating thermal component
that provides the dissipation necessary for the nucleation and motional-damping
of vortices in the condensate. Vortex lattice formation is not observed, rather
the vortices assemble into a spatially disordered vortex liquid state. We
discuss methods we have developed to identify the condensate in the presence of
an irregular distribution of vortices, determine the thermodynamic parameters
of the thermal component, and extract damping rates from the classical field
\\ ( , 686kb)
Date: Thu, 14 Aug 2008 19:49:15 GMT (151kb)

Title: Quantum computing with alkaline earth atoms
Authors: Andrew J. Daley, Martin M. Boyd, Jun Ye, and Peter Zoller
Categories: quant-ph cond-mat.other physics.atom-ph
Comments: 4 pages, 3 figures, RevTeX 4
   We present a complete scheme for quantum information processing using the
unique features of alkaline earth atoms. We show how two completely independent
lattices can be formed for the $^1$S$_0$ and $^3$P$_0$ states, with one used as
a storage lattice for qubits encoded on the nuclear spin, and the other as a
transport lattice to move qubits and perform gate operations. We discuss how
the $^3$P$_2$ level can be used for addressing of individual qubits, and how
collisional losses from metastable states can be used to perform gates via a
lossy blockade mechanism.
\\ ( , 151kb)
Date: Tue, 26 Aug 2008 02:46:06 GMT (125kb)

Title: Two-photon photoassociative spectroscopy of ultracold 88-Sr
Authors: Y. N. Martinez de Escobar, P. G. Mickelson, P. Pellegrini, S. B.
   Nagel, A. Traverso, M. Yan, R. Cote and T. C. Killian
Categories: physics.atom-ph
Comments: 9 pages, 9 figures
   We present results from two-photon photoassociative spectroscopy of the
least-bound vibrational level of the X$^1\Sigma_g^+$ state of the $^{88}$Sr$_2$
dimer. Measurement of the binding energy allows us to determine the s-wave
scattering length, $a_{88}=-1.4(6) a_0$. For the intermediate state, we use a
bound level on the metastable $^1S_0$-$^3P_1$ potential, which provides large
Franck-Condon transition factors and narrow one-photon photoassociative lines
that are advantageous for observing quantum-optical effects such as
Autler-Townes resonance splittings.
\\ ( , 125kb)
Date: Wed, 27 Aug 2008 11:59:51 GMT (241kb)

Title: Mean-field dynamics of a two-mode Bose-Einstein condensate subject to
   noise and dissipation
Authors: F. Trimborn, D. Witthaut, and S. Wimberger
Categories: cond-mat.other
Comments: 9 pages, 3 figures
Journal-ref: J. Phys. B: At. Mol. Opt. Phys. 41 (2008) 171001
DOI: 10.1088/0953-4075/41/17/171001
   We discuss the dynamics of an open two-mode Bose-Hubbard system subject to
phase noise and particle dissipation. Starting from the full many-body dynamics
described by a master equation the mean-field limit is derived resulting in an
effective non-hermitian (discrete) Gross-Pitaevskii equation which has been
introduced only phenomenologically up to now. The familiar mean-field phase
space structure is substantially altered by the dissipation. Especially the
character of the fixed points shows an abrupt transition from elliptic or
hyperbolic to attractiv or repulsive, respectively. This reflects the
metastable behaviour of the corresponding many-body system which surprisingly
also leads to a significant increase of the purity of the condensate. A
comparison of the mean-field approximation to simulations of the full master
equation using the Monte Carlo wave function method shows an excellent
agreement for wide parameter ranges.
\\ ( , 241kb)
Date: Wed, 27 Aug 2008 15:13:26 GMT (39kb)

Title: Radial quadrupole and scissors modes in trapped Fermi gases across the
   BCS phase transition
Authors: Michael Urban
Categories: cond-mat.other
Comments: 4 pages
   The excitation spectra of the radial quadrupole and scissors modes of
ultracold Fermi gases in elongated traps are studied across the BCS
superfluid-normal phase transition in the framework of a transport theory for
quasiparticles. In the limit of zero temperature, this theory reproduces the
results of superfluid hydrodynamics, while in the opposite limit, above the
critical temperature, it reduces to the collisionless Vlasov equation. In the
intermediate temperature range, the excitation spectra have two or three broad
peaks, respectively, which are roughly situated at hydrodynamic and
collisionless frequencies, and whose strength is shifted from the hydrodynamic
to the collisionless modes with increasing temperature. By fitting the time
dependent quadrupole deformation with a damped oscillation of a single
frequency, we can understand the "jump" of the frequency of the radial
quadrupole mode as a function of interaction strength which has recently been
reported by the Innsbruck group.
\\ ( , 39kb)
Date: Tue, 26 Aug 2008 21:31:32 GMT (69kb)

Title: Magnetic field modification of ultracold molecule-molecule collisions
Authors: T. V. Tscherbul, Yu. V. Suleimanov, V. Aquilanti, R. V. Krems
Categories: physics.atom-ph physics.chem-ph
Comments: 9 pages, 4 figures
   We present quantum mechanical calculations for spin relaxation and elastic
scattering in collisions of ultracold O2(3Sigma_g) molecules in a magnetic
field. Our results show that spin relaxation in molecule-molecule collisions is
very efficient except at magnetic fields below 10 G. The magnetic field
dependence of elastic and inelastic scattering cross sections at ultracold
temperatures is dominated by a dense manifold of Feshbach resonances. The
number and properties of the magnetic Feshbach resonances are dramatically
different for molecules in the absolute ground and excited spin states.
\\ ( , 69kb)
Date: Wed, 27 Aug 2008 02:59:22 GMT (744kb,D)

Title: Observation of Cold Charge-Exchange Collisions between Trapped Ions and
   Trapped Atoms
Authors: Andrew T. Grier, Marko Cetina, Fedja Oru\v{c}evi\'c, Vladan Vuleti\'c
Categories: physics.atom-ph
Comments: 4 pages, 4 figures
   We demonstrate a double-trap system well suited to study cold collisions
between trapped ions and trapped atoms. Using Yb$^+$ ions confined in a Paul
trap and Yb atoms in a magneto-optical trap, we investigate charge-exchange
collisions of several isotopes for collision energies down to 400 neV (5 mK).
The measured rate coefficient of $6 \times 10^{-10}$ cm$^{3} \mathrm{s}^{-1}$,
constant over four orders of magnitude in collision energy, is in good
agreement with that derived from a semiclassical Langevin model for an atomic
polarizability of 143 a.u.
\\ ( , 744kb)
Date: Wed, 27 Aug 2008 20:29:18 GMT (2643kb)

Title: Probing local relaxation of cold atoms in optical superlattices
Authors: A. Flesch, M. Cramer, I.P. McCulloch, U. Schollwoeck, J. Eisert
Categories: cond-mat.stat-mech
Comments: 18 pages RevTex, 20 figures, version to be published in Physical
   Review A
   In the study of relaxation processes in coherent non-equilibrium dynamics of
quenched quantum systems, ultracold atoms in optical superlattices with
periodicity two provide a very fruitful test ground. In this work, we consider
the dynamics of a particular, experimentally accessible initial state prepared
in a superlattice structure evolving under a Bose-Hubbard Hamiltonian in the
entire range of interaction strengths, further investigating the issues raised
in Ref. [Phys. Rev. Lett. 101, 063001 (2008)]. We investigate the relaxation
dynamics analytically in the non interacting and hard core bosonic limits,
deriving explicit expressions for the dynamics of certain correlation
functions, and numerically for finite interaction strengths using the
time-dependent density-matrix renormalization (t-DMRG) approach. We can
identify signatures of local relaxation that can be accessed experimentally
with present technology. While the global system preserves the information
about the initial condition, locally the system relaxes to the state having
maximum entropy respecting the constraints of the initial condition. For finite
interaction strengths and finite times, the relaxation dynamics contains
signatures of the relaxation dynamics of both the non-interacting and hard core
bosonic limits.
\\ ( , 2643kb)
Date: Thu, 28 Aug 2008 04:59:30 GMT (1275kb)

Title: Exact vector-soliton solutions in two-species Bose-Einstein condensates
   with arbitrary scattering lengths
Authors: Xunxu Liu, Han Pu, Bo Xiong, W. M. Liu, Jiangbin Gong
Categories: cond-mat.other
   We investigate the vector-soliton solutions of two-species Bose-Einstein
condensates with arbitrary scattering lengths. The results show that, for
quasi-one-dimension homogeneous systems, exact solutions exist even in the
regime where the nonlinear system is non-integrable. In addition, these vector
solitons can be dynamically stable in the presence of soft trapping potentials.
Different types of vector solitons may be realized and converted to each other
by tuning the inter-species interaction strength.
\\ ( , 1275kb)
Date: Thu, 28 Aug 2008 05:35:22 GMT (61kb)

Title: Ground state energy of unitary Fermi gas from the epsilon expansion
Authors: Yusuke Nishida
Categories: cond-mat.other
Comments: 6 pages, 5 figures
Report-no: INT-PUB 08-43
   We update the ground state energy ratio of unitary Fermi gas to
noninteracting Fermi gas (xi) from the epsilon expansion by including the
next-to-next-to-leading-order (NNLO) term near two spatial dimensions.
Interpolations of the NNLO epsilon expansions around four and two spatial
dimensions with the use of Pade approximants give xi=0.403+/-0.031 in three
dimensions. This value is consistent with the previous interpolations of the
NLO epsilon expansions xi=0.377+/-0.013 in spite of the large NNLO corrections.
\\ ( , 61kb)
Date: Thu, 28 Aug 2008 05:48:54 GMT (242kb)

Title: Controlling soliton interactions in Bose-Einstein condensates by
   synchronizing the Feshbach resonance and harmonic trap
Authors: Xiao-Fei Zhang, Qin Yang, Jie-Fang Zhang, X. Z. Chen, and W. M. Liu
Categories: cond-mat.other
Comments: 7 pages, 7 figures
Journal-ref: Phys. Rev. A. 77, 023613 (2008)
DOI: 10.1103/PhysRevA.77.023613
   We present how to control interactions between solitons, either bright or
dark, in Bose-Einstein condensates by synchronizing Feshbach resonance and
harmonic trap. Our results show that as long as the scattering length is to be
modulated in time via a changing magnetic field near the Feshbach resonance,
and the harmonic trapping frequencies are also modulated in time, exact
solutions of the one-dimensional nonlinear Schr\"{o}dinger equation can be
found in a general closed form, and interactions between two solitons are
modulated in detail in currently experimental conditions. We also propose
experimental protocols to observe the phenomena such as fusion, fission, warp,
oscillation, elastic collision in future experiments.
\\ ( , 242kb)
Date: Thu, 28 Aug 2008 10:28:25 GMT (255kb)

Title: A purely dipolar quantum gas
Authors: T. Lahaye, J. Metz, T. Koch, B. Fr\"ohlich, A. Griesmaier and T. Pfau
Categories: cond-mat.other
Comments: To appear in "ATOMIC PHYSICS 21", proceedings of the XXI
   International Conference on Atomic Physics (ICAP 2008)
   We report on experiments exploring the physics of dipolar quantum gases using
a Chromium Bose-Einstein condensate (BEC). By means of a Feshbach resonance, it
is possible to reduce the effects of short range interactions and reach a
regime where the physics is governed by the long-range, anisotropic
dipole-dipole interaction between the large ($6 \mu_{\rm B}$) magnetic moments
of Chromium atoms. Several dramatic effects of the dipolar interaction are
observed: the usual inversion of ellipticity of the condensate during time-of
flight is inhibited, the stability of the dipolar gas depends strongly on the
trap geometry, and the explosion following the collapse of an unstable dipolar
condensate displays d-wave like features.
\\ ( , 255kb)
Date: Thu, 28 Aug 2008 12:03:08 GMT (672kb)

Title: Coupled two-component atomic gas in an optical lattice
Authors: Jonas Larson, jani-Petri Martikainen
Categories: cond-mat.other
Comments: 9 pages, 7 figures
   We study the ground state of an ideal coupled two-component gas of ultracold
atoms in a one dimensional optical lattice, either bosons or fermions. Due to
the internal two-level structure of the atoms, the Brillouin zone is twice as
large as imposed by the periodicity of the lattice potential. This is reflected
in the Bloch dispersion curves, where the energy bands regularly possess
several local minima. As a consequence, when the system parameters are tuned
across a resonance condition, a non-zero temperature topological first order
phase transition occurs which arises from an interplay between initernal and
kinetic atomic energies. It is shown that these phenomena are also captured for
two and three dimensional optical lattices.
\\ ( , 672kb)
Date: Thu, 28 Aug 2008 18:34:28 GMT (133kb)

Title: Feshbach resonances in an ultracold $^7$Li and $^{87}$Rb mixture
Authors: C. Marzok, B. Deh, C. Zimmermann, Ph. W. Courteille, E. Tiemann, Y. V.
   Vanne, A. Saenz
Categories: cond-mat.other
Comments: 7 pages, 3 figures, 4 tables
   We report on the observation of five Feshbach resonances in collisions
between ultracold $^7$Li and $^{87}$Rb atoms in the absolute ground state
mixture where both species are in their $|f,m_f>=|1,1>$ hyperfine states. The
resonances appear as trap losses for the $^7$Li cloud induced by inelastic
heteronuclear three-body collisions. The magnetic field values where they occur
are important quantities for an accurate determination of the interspecies
interaction potentials. Results of coupled channels calculations based on the
observed resonances are presented and refined potential parameters are given. A
very broad Feshbach resonance centered around 649 G should allow for fine
tuning of the interaction strength in future experiments.
\\ ( , 133kb)
Date: Thu, 28 Aug 2008 13:55:24 GMT (252kb)

Title: Simulability and regularity of complex quantum systems
Authors: Hannah Venzl and Andrew J. Daley and Florian Mintert and Andreas
Categories: quant-ph
   We show that the transition from regular to chaotic spectral statistics in
interacting many-body quantum systems has an unambiguous signature in the
distribution of Schmidt coefficients dynamically generated from a generic
initial state, and thus limits the efficiency of the t-DMRG algorithm.
\\ ( , 252kb)
Date: Thu, 28 Aug 2008 15:24:27 GMT (349kb)

Title: Radio-frequency control of the Lande factor of Bose-condensed chromium
Authors: Q. Beaufils, T. Zanon, R. Chicireanu, B. Laburthe-Tolra, E. Marechal,
   L. Vernac, J.-C. Keller, and O. Gorceix
Categories: quant-ph
Comments: 4 pages, 4 figures
   We study the effect of strong radio-frequency (rf) fields on a chromium
Bose-Einstein condensate, in a regime where the rf frequency is much larger
than the Larmor frequency. We show that the Lande factor of the atoms is
lowered by the presence of the rf, and can be even set to zero for a proper
combination of the rf power and frequency. The trajectories of the atoms under
the influence of magnetic potentials are thus greatly modified. We study the
criteria for adiabaticity of the rf dressing process leading to such a
modification of the atom magnetic susceptibility. We also measure the lifetime
of the rf dressed BECs.
\\ ( , 349kb)
Date: Thu, 28 Aug 2008 15:26:05 GMT (78kb)

Title: Nonlinear transmission through a tapered fiber in rubidium vapor
Authors: S.M. Hendrickson, T.B. Pittman and J.D. Franson
Categories: quant-ph
   Sub-wavelength diameter tapered optical fibers surrounded by rubidium vapor
can undergo a substantial decrease in transmission at high atomic densities due
to the accumulation of rubidium atoms on the surface of the fiber. Here we
demonstrate the ability to control these changes in transmission using light
guided within the taper. We observe transmission through a tapered fiber that
is a nonlinear function of the incident power. This effect can also allow a
strong control beam to change the transmission of a weak probe beam.
\\ ( , 78kb)
Date: Thu, 28 Aug 2008 07:01:10 GMT (275kb)

Title: Accelerometer using atomic waves for space applications
Authors: Arnaud Landragin (SYRTE), Franck Pereira Dos Santos (SYRTE)
Categories: physics.atom-ph
   The techniques of laser cooling combined with atom interferometry make
possible the realization of very sensitive and accurate inertial sensors like
gyroscopes or accelerometers. Besides earth-based developments, the use of
these techniques in space should provide extremely high sensitivity for
research in fundamental physics, Earth's observation and exploration of the
solar system.
\\ ( , 275kb)

The replacements:

replaced with revised version Fri, 22 Aug 2008 09:59:09 GMT (10kb)

Title: On Translational Superfluidity and the Landau Criterion for Trapped Bose
   gases in the Gross-Pitaevski Limit
Authors: Walter F. Wreszinski
Categories: cond-mat.supr-con cond-mat.stat-mech
Comments: 5 pages, no figures
\\ ( , 10kb)
replaced with revised version Fri, 22 Aug 2008 18:32:31 GMT (193kb)

Title: Heteronuclear molecules in an optical dipole trap
Authors: J. J. Zirbel, K.-K. Ni, S. Ospelkaus, T. L. Nicholson, M. L. Olsen, C.
   E. Wieman, J. Ye, D. S. Jin, and P. S. Julienne
Categories: cond-mat.other
Comments: 7 pages, 7 figures
Journal-ref: Phys. Rev. A 78, 013416 (2008)
DOI: 10.1103/PhysRevA.78.013416
\\ ( , 193kb)
replaced with revised version Fri, 22 Aug 2008 09:24:01 GMT (1098kb)

Title: d-wave collapse and explosion of a dipolar Bose-Einstein condensate
Authors: Thierry Lahaye, Jonas Metz, Bernd Froehlich, Tobias Koch, Maximilian
   Meister, Axel Griesmaier, Tilman Pfau, Hiroki Saito, Yuki Kawaguchi and
   Masahito Ueda
Categories: cond-mat.other
Comments: 4 pages, 4 figures
Journal-ref: Phys. Rev. Lett. 101, 080401 (2008)
DOI: 10.1103/PhysRevLett.101.080401
\\ ( , 1098kb)
replaced with revised version Fri, 22 Aug 2008 17:45:49 GMT (547kb)

Title: Radio frequency spectroscopy of a strongly imbalanced Feshbach-resonant
   Fermi gas
Authors: Martin Veillette, Eun Gook Moon, Austen Lamacraft, Leo Radzihovsky,
   Subir Sachdev, and D.E. Sheehy
Categories: cond-mat.str-el cond-mat.supr-con
Comments: 10 pages, 5 figures; (v2) Numerous minor updates
\\ ( , 547kb)
replaced with revised version Thu, 21 Aug 2008 22:19:47 GMT (2811kb)

Title: Quantum Monte Carlo Simulations of the BCS-BEC Crossover at Finite
Authors: Aurel Bulgac, Joaquin E. Drut, Piotr Magierski
Categories: cond-mat.stat-mech
Comments: 24 pages, 20 figures, published version, additional material and
Journal-ref: Phys. Rev. A 78, 023625 (2008)
DOI: 10.1103/PhysRevA.78.023625
\\ ( , 2811kb)
replaced with revised version Fri, 22 Aug 2008 01:54:54 GMT (286kb)

Title: Incommensurate superfluidity of bosons in a double-well optical lattice
Authors: Vladimir M. Stojanovic, Congjun Wu, W. Vincent Liu, S. Das Sarma
Categories: cond-mat.other quant-ph
Comments: 4 pages, 5 figures; to appear in Phys. Rev. Lett
\\ ( , 286kb)
replaced with revised version Fri, 22 Aug 2008 10:42:22 GMT (519kb)

Title: Winding up by a quench: Insulator to superfluid phase transition in a
   ring of BECs
Authors: J. Dziarmaga, J. Meisner, and W.H. Zurek
Categories: cond-mat.stat-mech cond-mat.mes-hall physics.atom-ph quant-ph
Comments: minor typo corrections; version to appear in Phys.Rev.Lett
\\ ( , 519kb)
replaced with revised version Fri, 22 Aug 2008 08:51:43 GMT (26kb)

Title: Geometric potentials in quantum optics: A semi-classical interpretation
Authors: Marc Cheneau (LKB - Lhomond), Steffen Patrick Rath (LKB - Lhomond),
   Tarik Yefsah (LKB - Lhomond), Kenneth John G\"unter (LKB - Lhomond),
   Gediminas Juzeliunas, Jean Dalibard (LKB - Lhomond)
Categories: cond-mat.other quant-ph
Comments: 6 pages, 1 figure, minor typos corrected
Journal-ref: Europhysics Letters (EPL) 83, 6 (2008) 60001
DOI: 10.1209/0295-5075/83/60001
\\ ( , 26kb)
replaced with revised version Fri, 22 Aug 2008 16:03:51 GMT (179kb)

Title: Collective Excitations of Rotating Dipolar Fermi Gases in the Fractional
   Quantum Hall Regime
Authors: Szu-Cheng Cheng
Categories: cond-mat.mes-hall
Comments: 13 pages, 3 figures
\\ ( , 179kb)
replaced with revised version Fri, 22 Aug 2008 19:52:37 GMT (333kb)

Title: Complementarity and uncertainty relations for matter wave interferometry
Authors: K.-P. Marzlin, B. C. Sanders, and P. L. Knight
Categories: quant-ph
Comments: nine pages, five figures
\\ ( , 333kb)
replaced with revised version Mon, 25 Aug 2008 06:36:13 GMT (501kb)

Title: Unitary Fermi gas in the epsilon expansion
Authors: Yusuke Nishida
Categories: cond-mat.other hep-ph nucl-th
Comments: 103 pages, 29 figures; PhD thesis, Univ. of Tokyo, 2007 (supervisor:
   T. Hatsuda and D. T. Son); (v2) Eqs.(6.43)-(6.47) are corrected
\\ ( , 501kb)
replaced with revised version Mon, 25 Aug 2008 01:21:15 GMT (572kb)

Title: Quantized vortices in atomic Bose-Einstein condensates
Authors: Kenichi Kasamatsu, Makoto Tsubota
Categories: cond-mat.other cond-mat.mes-hall
Comments: 51 pages, 12 figures, to be published in Progress in Low Temperature
   Physics, vol. 16
\\ ( , 572kb)
arXiv:0808.2724 (*cross-listing*)
Date: Wed, 20 Aug 2008 10:19:53 GMT (19kb)

Title: Bosons in Rapid Rotation
Authors: Jakob Yngvason
Categories: math-ph cond-mat.other math.MP
Comments: 16 pages, lecture given at a symposium in honor of Michel
   Dubois-Violette, Orsay, April 2008
MSC-class: 35Q55,47J30,76M23
   Some recent progress in the mathematical physics of rapidly rotating, dilute
Bose gases in anharmonic traps is reviewed.
\\ ( , 19kb)
replaced with revised version Tue, 26 Aug 2008 08:06:37 GMT (1269kb)

Title: Quantum fluctuations in the image of a Bose gas
Authors: Antonio Negretti, Carsten Henkel, Klaus Molmer
Categories: quant-ph
Comments: 14 pages, 6 figures
Journal-ref: Phys. Rev. A 78, 023630 (2008)
DOI: 10.1103/PhysRevA.78.023630
\\ ( , 1269kb)
replaced with revised version Wed, 27 Aug 2008 02:44:27 GMT (43kb)

Title: Effects of disorder on atomic density waves and spin-singlet dimers in
   one-dimensional optical lattices
Authors: Gao Xianlong
Categories: cond-mat.str-el
Comments: 6 pages, 5 figures
Journal-ref: Phys. Rev. B 78, 085108 (2008) (6 pages)
\\ ( , 43kb)
replaced with revised version Wed, 27 Aug 2008 10:11:51 GMT (106kb)

Title: Ground-state properties of one-dimensional anyon gases
Authors: Yajiang Hao, Yunbo Zhang, Shu Chen
Categories: cond-mat.str-el cond-mat.stat-mech
Comments: 6 pages, 5 figures, published version in Phys. Rev. A
Journal-ref: Phys. Rev. A 78, 023631 (2008)
DOI: 10.1103/PhysRevA.78.023631
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replaced with revised version Thu, 28 Aug 2008 02:31:42 GMT (572kb)

Title: Quantized vortices in atomic Bose-Einstein condensates
Authors: Kenichi Kasamatsu, Makoto Tsubota
Categories: cond-mat.other cond-mat.mes-hall
Comments: 51 pages, 12 figures, to be published in Progress in Low Temperature
   Physics, vol. 16
\\ ( , 572kb)

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
Legal stuff: Unless stated otherwise, this e-mail represents only the
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Received on Thu Sep 25 2008 - 10:28:28 EST

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