Matt's arXiv selection: week ending 9 March 2007.

From: Matthew Davis <>
Date: Fri, 16 Mar 2007 16:01:05 +1000 (EST)

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

Hi everyone,

I've only just had broadband internet installed at home (yes, I'm slow), and
while mucking around this week I was surprised to find a video about BECs and
atom lasers on YouTube. It features Rob Ballagh and Andrew Wilson from the
University of Otago, and you can watch for yourself at:

Twenty-three new papers and eighteen replacements this week:

Paper: cond-mat/0703044
Date: Thu, 1 Mar 2007 22:41:48 GMT (526kb)

Title: Ground-state structure and stability of dipolar condensates in
   anisotropic traps
Authors: O. Dutta and P. Meystre
Categories: cond-mat.other
Subj-class: Other
   We study the Hartree ground state of a dipolar condensate of atoms or
molecules in an three-dimensional anisotropic geometry and at T=0. We determine
the stability of the condensate as a function of the aspect ratios of the trap
frequencies and of the dipolar strength. We find numerically a rich phase space
structure characterized by various structures of the ground-state density
\\ ( , 526kb)
Paper: cond-mat/0703045
Date: Fri, 2 Mar 2007 00:14:52 GMT (557kb)

Title: Comment on ``Nonlinear band structure in Bose-Einstein condensates:
   Nonlinear Sch\"odinger equation with a Kronig Penney potential"
Authors: Ippei Danshita and Shunji Tsuchiya
Categories: cond-mat.other
Comments: 3 pages, 3 figures
Subj-class: Other
   In their recent paper [Phys. Rev. A 71, 033622], B. T. Seaman et al. studied
Bloch states of the condensate wave function in a Kronig-Penney potential and
calculated the band structure. They argued that the effective mass is always
positive when a swallow-tail energy loop is present in the band structure. In
this comment, we reexamine their argument by actually calculating the effective
mass. It is found that there exists a region where the effective mass is
negative even when a swallow-tail is present. Based on this fact, we discuss
the interpretation of swallow-tails in terms of superfluidity.
\\ ( , 557kb)
Paper: cond-mat/0703047
Date: Fri, 2 Mar 2007 02:00:59 GMT (25kb)

Title: Kolmogorov and Kelvin-Wave Cascades of Superfluid Turbulence at T=0:
   What is in Between?
Authors: Evgeny Kozik and Boris Svistunov
Categories: cond-mat.other
Comments: 4 RevTex pages, 1 figure
Subj-class: Other
   As long as vorticity quantization remains irrelevant for the long-wave
physics, superfluid turbulence supports a regime macroscopically identical to
the Kolmogorov cascade of a normal liquid. At high enough wavenumbers, the
energy flux in the wavelength space is carried by individual Kelvin-wave
cascades on separate vortex lines. We analyze the transformation of the
Kolmogorov cascade into the Kelvin-wave cascade, revealing a chain of three
distinct intermediate cascades, supported by local-induction motion of the
vortex lines, and distinguished by specific reconnection mechanisms. The most
prominent qualitative feature predicted is unavoidable production of vortex
rings of the size of the order of inter-vortex distance.
\\ ( , 25kb)
Paper: cond-mat/0703050
Date: Fri, 2 Mar 2007 08:23:48 GMT (317kb,D)

Title: Localization of particles in harmonic confinement: Effect of the
   interparticle interaction
Authors: J.-P. Nikkarila and M. Manninen
Categories: cond-mat.mes-hall cond-mat.str-el
Comments: 9 pages, 9 figures
Subj-class: Mesoscopic Systems and Quantum Hall Effect; Strongly Correlated
   We study the localization of particles rotating in a two-dimensional harmonic
potential by solving their rotational spectrum using many-particle quantum
mechanics and comparing the result to that obtained with quantizing the rigid
rotation and vibrational modes of localized particles. We show that for a small
number of particles the localization is similar for bosons and fermions.
Moreover, independent of the range of the interaction the quantum mechanical
spectrum at large angular momenta can be understood by vibrational modes of
localized particles.
\\ ( , 317kb)
Paper (*cross-listing*): nucl-th/0703007
Date: Thu, 1 Mar 2007 17:48:57 GMT (6kb)

Title: Exact boson mapping of the reduced BCS pairing Hamiltonian
Authors: Feng Pan and J. P. Draayer
Categories: nucl-th cond-mat.str-el
Comments: 4.3pages LaTeX
Report-no: LSU-LNNU-0705
Subj-class: Nuclear Theory; Strongly Correlated Electrons
   An exact boson mapping of the reduced BCS (equal strength) pairing
Hamiltonian is considered. In the mapping, fermion pair operators are mapped
exactly to the corresponding bosons. The image of the mapping results in a
Bose-Hubbard model with level dependent hopping. Though the resultant
Bose-Hubbard Hamiltonian is non-Hermitian, all eigenvalues are real when Uk/t<
1, where k is the total number of bosons. When U/t=1, a part of spectrum of the
Bose-Hubbard Hamiltonian corresponds exactly to the whole spectrum of the
reduced BCS pairing Hamiltonian.
\\ ( , 6kb)
Paper: cond-mat/0703087
Date: Sat, 3 Mar 2007 01:38:05 GMT (337kb)

Title: p-wave Feshbach molecules
Authors: J. P. Gaebler, J. T. Stewart, J. L. Bohn, D. S. Jin
Categories: cond-mat.other
Subj-class: Other
   We have produced and detected molecules using a p-wave Feshbach resonance
between $^{40}$K atoms. We have measured the binding energy and lifetime for
these molecules and we find that the binding energy scales approximately
linearly with magnetic field near the resonance. The lifetime of bound p-wave
molecules is measured to be $1.0 \pm 0.1$ ms and $2.3 \pm 0.2$ ms for the $m_l
= \pm 1$ and $m_l = 0$ angular momentum projections, respectively. At magnetic
fields above the resonance, we detect quasi-bound molecules whose lifetime is
set by the tunneling rate through the centrifugal barrier.
\\ ( , 337kb)
Paper: cond-mat/0703091
Date: Sat, 3 Mar 2007 14:12:17 GMT (986kb)

Title: Ultracold Fermi gases in the BEC-BCS crossover: a review from the
   Innsbruck perspective
Authors: Rudolf Grimm
Categories: cond-mat.other
Comments: Ultracold Fermi Gases, Proceedings of the International School of
   Physics "Enrico Fermi", Course CLXIV, Varenna, 20 - 30 June 2006, edited by
   M. Inguscio, W. Ketterle, and C. Salomon
Subj-class: Other
   A review of recent BEC-BCS crossover experiments in ultracold Fermi gases is
given with particular emphasis on the work performed with lithium-6 at the
University of Innsbruck.
\\ ( , 986kb)
Paper: cond-mat/0703092
Date: Sat, 3 Mar 2007 16:04:27 GMT (277kb)

Title: Coherent control of solitons in strongly coupled cigar shaped BEC and
   its modulational instability
Authors: Utpal Roy and P. K. Panigrahi
Categories: cond-mat.other
Comments: 7 pages, 8 figures
Subj-class: Other
   Soliton solutions of strongly coupled Bose-Einstein condensate and their
coherent control is demonstrated analytically, in the presence of a harmonic
trap. In particular, a soliton solution with ${\it W}$ type density profile,
well suited for trapping of neutral atoms, is found whose minima locations can
be precisely controlled. Soliton complex, containing a singular soliton
exhibiting matter wave self-focussing, as also bright solitons are obtained as
exact solutions in the attractive regime. We derive the conditions of
modulational instability in the strong interaction regime.
\\ ( , 277kb)
Paper: cond-mat/0703108
Date: Mon, 5 Mar 2007 04:22:03 GMT (358kb)

Title: Noise-resistant entanglement of strongly interacting spin systems
Authors: A. M. Rey, L. Jiang, M. Fleischhauer, E. Demler and M.D. Lukin
Categories: cond-mat.other
Comments: 5 Pages, 3 Figures
Subj-class: Other
   We propose and analyze a scheme that makes use of interactions between spins
to protect certain correlated many-body states from decoherence. The method
exploits the finite energy gap of properly designed Hamiltonians to generate a
manifold insensitive to local noise fluctuations. We apply the scheme to
achieve decoherence-resistant generation of many particle GHZ states and show
that it can improve the sensitivity in precision spectroscopy with trapped
ions. Finally we also show that cold atoms in optical lattices interacting via
short range interactions can be utilized to engineer the required long range
interactions for a robust generation of entangled states.
\\ ( , 358kb)
Paper: cond-mat/0703117
Date: Mon, 5 Mar 2007 11:22:59 GMT (76kb)

Title: Correlation functions of one-dimensional anyonic fluids
Authors: Pasquale Calabrese and Mihail Mintchev
Categories: cond-mat.stat-mech
Comments: 4 pages, 1 figure
Subj-class: Statistical Mechanics
   A universal description of correlation functions of one-dimensional anyonic
gapless systems in the low-momentum regime is presented. We point out a number
of interesting features, including universal oscillating terms with frequency
proportional to the statistical parameter and beating effects close to the
fermion points. The results are applied to the one-dimensional anyonic
Lieb-Liniger model and checked against the exact results in the impenetrable
\\ ( , 76kb)
Paper: cond-mat/0703123
Date: Mon, 5 Mar 2007 15:12:54 GMT (525kb)

Title: Shot noise in carbon nanotube based Fabry-Perot interferometers
Authors: L.G. Herrmann (LPA), T. Delattre (LPA), P. Morfin (LPA), J.-M. Berroir
   (LPA), B. Pla\c{c}ais (LPA), D.C. Glattli (LPA, SPEC), T. Kontos (LPA)
Categories: cond-mat.mes-hall
Proxy: ccsd hal-00134879
Subj-class: Mesoscopic Systems and Quantum Hall Effect
   We report on shot noise measurements in carbon nanotube based Fabry-Perot
electronic interferometers. As a consequence of quantum interferences, the
noise power spectral density oscillates as a function of the voltage applied to
the gate electrode. The quantum shot noise theory accounts for the data
quantitatively. It allows to confirm the existence of two nearly degenerate
orbitals. At resonance, the transmission of the nanotube approaches unity, and
the nanotube becomes noiseless, as observed in quantum point contacts. In this
weak backscattering regime, the dependence of the noise on the backscattering
current is found weaker than expected, pointing either to electron-electron
interactions or to weak decoherence.
\\ ( , 525kb)
Paper: quant-ph/0703031
Date: Sun, 4 Mar 2007 17:16:59 GMT (728kb)

Title: Cold polar molecules in 2D traps: Tailoring interactions with external
   fields for novel quantum phases
Authors: A. Micheli, G. Pupillo, H. P. B\"uchler, and P. Zoller
Categories: quant-ph
Comments: 28 pages, 15 figures
   We discuss techniques to engineer effective long-range interactions between
polar molecules using external static electric and microwave fields. We
consider a setup where molecules are trapped in a two-dimensional pancake
geometry by a far-off-resonance optical trap, which ensures the stability of
the dipolar collisions. We detail how to modify the shape and the strength of
the long-range part of interaction potentials, which can be utilized to realize
interesting quantum phases in the context of cold molecular gases.
\\ ( , 728kb)
Paper: quant-ph/0703040
Date: Mon, 5 Mar 2007 18:53:23 GMT (321kb)

Title: Quantum Light States Engineering via Quantum Feedback Control
Authors: Antonio Negretti, Uffe V. Poulsen, Klaus Molmer
Categories: quant-ph
Comments: RevTex4, 4 pages, 2 figures. Submitted to Phys. Rev. Lett
   We present a protocol for deterministic generation of Fock states and
Schroedinger cat-like states in an optical cavity by quantum non-demolition
photon number measurements and coherent feeding of the cavity. We show how a
careful feedback protocol design helps to achieve high success rates for
generation of states with high fidelity.
\\ ( , 321kb)
Paper: cond-mat/0703160
Date: Tue, 6 Mar 2007 17:35:18 GMT (895kb)

Title: Controllable Josephson-Like Tunneling in Two-Component Bose-Einstein
   Condensates Coupled with Microwave via Feshbach Resonance and Trapping
Authors: Bo Xiong, Weiping Zhang, W. M. Liu
Categories: cond-mat.other
Comments: 4 pages, 5 figures
Subj-class: Other
   We put forward a scheme for controlling Josephson-like tunneling in
two-component Bose-Einstein condensates coupled with microwave field via
Feshbach resonance and tuning aspect ratio of trapping potential. We prove how
to realize a perfect periodic oscillation from a fast damped and irregular
oscillation on relative number of atoms in future experiment. In particular,
intensity of Josephson-like tunneling can be successfully controlled through
controlling speed of recovering the initial value of intra-atomic interaction
and aspect ratio of trapping potential. Interestingly, we find that relative
number of atoms represents two different types of oscillation in respond to
periodic modulation of attractive intra-atomic interaction.
\\ ( , 895kb)
Paper: cond-mat/0703163
Date: Tue, 6 Mar 2007 19:12:47 GMT (333kb)

Title: Quantum versus classical statistical dynamics of an ultracold Bose gas
Authors: J. Berges and T. Gasenzer
Categories: cond-mat.other
Comments: 19 pages, 10 figures
Subj-class: Other
   We investigate the conditions under which quantum fluctuations are relevant
for the quantitative interpretation of experiments with ultracold Bose gases.
This requires to go beyond the description in terms of the Gross-Pitaevskii and
Hartree-Fock-Bogoliubov mean-field theories, which can be obtained as classical
(statistical) field-theory approximations of the quantum many-body problem. We
employ functional-integral techniques based on the two-particle irreducible
(2PI) effective action. The role of quantum fluctuations is studied within the
nonperturbative 2PI 1/N expansion to next-to-leading order. At this accuracy
level memory-integrals enter the dynamic equations, which differ for quantum
and classical statistical descriptions. This can be used to obtain a
'classicality' condition for the many-body dynamics. We exemplify this
condition by studying the nonequilibrium evolution of a 1D Bose gas of sodium
atoms, and discuss some distinctive properties of quantum versus classical
statistical dynamics.
\\ ( , 333kb)
Paper (*cross-listing*): hep-ph/0703042
Date: Mon, 5 Mar 2007 02:50:23 GMT (22kb)

Title: Relativistic BCS-BEC Crossover at Zero Temperature
Authors: Lianyi He and Pengfei Zhuang
Categories: hep-ph cond-mat.supr-con nucl-th
Comments: 8 pages, 3 figures
Subj-class: High Energy Physics - Phenomenology; Superconductivity
   We investigate the BCS-BEC crossover at zero temperature in the frame of a
relativistic model. Due to the nontrivial role of the fermion mass, the
universality of the BCS-BEC crossover for non-relativistic systems breaks down
in relativistic case and the crossover can be induced by changing the density.
When the effective scattering length is much less than the fermion Compton
wavelength, we recover the non-relativistic result if the gas is initially in
non-relativistic state. At ultra-strong coupling where the scattering length is
of the order of the Compton wavelength, a new BEC state appears. In this state
the condensed bosons become nearly massless and anti-fermions are excited. The
behavior of the Goldstone mode and the mixing between the amplitude and phase
modes are significantly different in different condensed regions.
\\ ( , 22kb)
Paper: quant-ph/0703044
Date: Tue, 6 Mar 2007 17:21:43 GMT (2122kb)

Title: Entanglement in Many-Body Systems
Authors: Luigi Amico, Rosario Fazio, Andreas Osterloh, and Vlatko Vedral
Categories: quant-ph
Comments: 66 pages, 31 figures; submitted to Rev. Mod. Phys
   The recent interest in aspects common to quantum information and condensed
matter has prompted a prosperous activity at the border of these disciplines
that were far distant until few years ago. Numerous interesting questions have
been addressed so far. Here we review an important part of this field, the
properties of the entanglement in many-body systems. We discuss the zero and
finite temperature properties of entanglement in interacting spin, fermionic
and bosonic model systems. Both bipartite and multipartite entanglement will be
considered. At equilibrium we emphasize on how entanglement is connected to the
phase diagram of the underlying model. The behavior of entanglement can be
related, via certain witnesses, to thermodynamic quantities thus offering
interesting possibilities for an experimental test. Out of equilibrium we
discuss how to generate and manipulate entangled states by means of many-body
\\ ( , 2122kb)
Paper: physics/0703067
Date: Tue, 6 Mar 2007 20:55:22 GMT (20kb)

Title: Observation of the 1S0 - 3P0 clock transition in 27Al+
Authors: T. Rosenband, P.O. Schmidt, D.B. Hume, W.M. Itano, T.M. Fortier, J.E.
   Stalnaker, S.A. Diddams, J.C.J. Koelemeij, J.C. Bergquist, and D.J. Wineland
Categories: physics.atom-ph physics.gen-ph
Comments: 4 pages, 2 figures
Subj-class: Atomic Physics; General Physics
   We report for the first time, laser spectroscopy of the 1S0 - 3P0 clock
transition in 27Al+. A single aluminum ion and a single beryllium ion are
simultaneously confined in a linear Paul trap, coupled by their mutual Coulomb
repulsion. This coupling allows the beryllium ion to sympathetically cool the
aluminum ion, and also enables transfer of the aluminum's electronic state to
the beryllium's hyperfine state, which can be measured with high fidelity.
These techniques are applied to a measurement of the clock transition
frequency, \nu = 1 121 015 393 207 851(8) Hz. They are also used to measure the
lifetime of the metastable clock state, \tau = 20.6 +/- 1.4 s, the ground state
1S0 g-factor, g_S = -0.00079248(14), and the excited state 3P0 g-factor, g_P =
-0.00197686(21), in units of the Bohr magneton.
\\ ( , 20kb)
Paper: cond-mat/0703169
Date: Wed, 7 Mar 2007 06:43:36 GMT (234kb)

Title: Intrinsic Heating and Cooling in Adiabatic Processes for Bosons in
   Optical Lattices
Authors: Tin-Lun Ho and Qi Zhou
Categories: cond-mat.other
Comments: 4 pages, 3 figures
Subj-class: Other
   We show that by raising the lattice "adiabatically" as in all current optical
lattice experiments on bosons, even though the temperature may decrease
initially, it will eventually rise linearly with lattice height, taking the
system further away from quantum degeneracy. This increase is {\rm intrinsic}
and is caused by the {\em adiabatic compression} during the raising of red
detuned lattices. However, the origin of this heating, which is {\em entirely
different} from that in the bulk, also shows that one can {\em reverse} the
temperature rise to reach quantum degeneracy by {\em adiabatic expansion},
which can be achieved by using blue detuned lasers.
\\ ( , 234kb)
Paper: cond-mat/0703171
Date: Wed, 7 Mar 2007 15:00:09 GMT (300kb)

Title: Matter Wave Scattering and Guiding by Atomic Arrays
Authors: J. Y. Vaishnav, J. D. Walls, M. Apratim, E. J. Heller
Categories: cond-mat.mes-hall cond-mat.other
Comments: Submitted to Phys. Rev. A
Subj-class: Mesoscopic Systems and Quantum Hall Effect; Other
   We investigate the possibility that linear arrays of atoms can guide matter
waves, much as fiber optics guide light. We model the atomic line as a quasi-1D
array of s wave point scatterers embedded in 2D. Our theoretical study reveals
how matter wave guiding arises from the interplay of scattering phenomena with
bands and conduction along the array. We discuss the conditions under which a
straight or curved array of atoms can guide a beam focused at one end of the
\\ ( , 300kb)
Paper: quant-ph/0703065
Date: Wed, 7 Mar 2007 17:05:49 GMT (825kb)

Title: Cavity-enhanced superradiant Rayleigh scattering with ultra-cold and
   Bose-Einstein condensed atoms
Authors: Sebastian Slama, Gordon Krenz, Simone Bux, Claus Zimmermann, and Ph.
   W. Courteille
Categories: quant-ph
Comments: 10 pages, 10 figures
   We report on the observation of collective atomic recoil lasing and
superradiant Rayleigh scattering with ultracold and Bose-Einstein condensed
atoms in an optical ring cavity. Both phenomena are based on instabilities
evoked by the collective interaction of light with cold atomic gases. This
publication clarifies the link between the two effects. The observation of
superradiant behavior with thermal clouds as hot as several tens of
$\mu\textrm{K}$ proves that the phenomena are driven by the cooperative
dynamics of the atoms, which is strongly enhanced by the presence of the ring
\\ ( , 825kb)
Paper: cond-mat/0703200
Date: Thu, 8 Mar 2007 08:53:53 GMT (672kb)

Title: Critical Point of an Interacting Two-Dimensional Atomic Bose Gas
Authors: Peter Kr\"{u}ger (LKB - Lhomond), Zoran Hadzibabic (LKB - Lhomond),
   Jean Dalibard (LKB - Lhomond)
Categories: cond-mat.other
Proxy: ccsd hal-00135497
Subj-class: Other
   We have measured the critical atom number in a harmonically trapped
two-dimensional (2D) Bose gas of rubidium atoms at different temperatures. We
found this number to be about five times higher than predicted by the
semi-classical theory of Bose-Einstein condensation (BEC) in the ideal gas.
This demonstrates that the conventional BEC picture is inapplicable in an
interacting 2D atomic gas, in sharp contrast to the three-dimensional case. A
simple heuristic model based on the Berezinskii-Kosterlitz-Thouless theory of
2D superfluidity and the local density approximation accounts well for our
experimental results.
\\ ( , 672kb)
Paper: cond-mat/0703205
Date: Thu, 8 Mar 2007 10:58:04 GMT (232kb)

Title: Larkin-Ovchinnikov state in resonant Fermi gas
Authors: Nobukatsu Yoshida and S.-K. Yip
Categories: cond-mat.other
Subj-class: Other
   We construct the phase diagram of a homogeneous two component Fermi gas with
population imbalance under a Feshbach resonance. In particular, we study the
physics and stability of the Larkin-Ovchinnikov phase. We show that this phase
is stable over a much larger parameter range than what has been previously
reported by other authors.
\\ ( , 232kb)
Paper: cond-mat/0703211
Date: Thu, 8 Mar 2007 14:07:25 GMT (5kb)

Title: A Proposed Casimir-Like Effect Between Contaminants in Ideal
   Bose-Einstein Condensates
Authors: Alexander Oshmyansky
Categories: cond-mat.other
Comments: 9 pages. Submitted to Physics Review A
Subj-class: Other
   It is hypothesized that, within Bose-Einstein condensates, contaminants will
form a potential that effects the energy state of a condensate. While assuming
a system governed by the Gross-Pitaevskii equation, contaminants are modelled
as boundary conditions for the wave function of the condensate. It is then
found that the energy of the system depends directly upon the distance between
contaminants. Energy is minimized as two particles either come together or move
apart depending on the nature of the condensate. This is due to the presence of
induced standing waves in the condensate between two contaminants, similar to
the attractive effect caused by standing electromagnetic waves in a vacuum, the
Casimir effect. Quantum calculations are also done to determine the expected
strength of the "contaminant in condensate" effect.
\\ ( , 5kb)
Paper: cond-mat/0703220
Date: Thu, 8 Mar 2007 19:05:04 GMT (307kb)

Title: Density and Stability in Ultracold Dilute Boson-Fermion Mixtures
Authors: Steffen Roethel and Axel Pelster
Categories: cond-mat.stat-mech
Comments: Author Information under
Subj-class: Statistical Mechanics
   We analyze in detail recent experiments on ultracold dilute 87Rb-40K mixtures
in Hamburg and in Florence within a mean-field theory. To this end we determine
how the stationary bosonic and fermionic density profiles in this mixture
depend in the Thomas-Fermi limit on the respective particle numbers.
Furthermore, we investigate how the observed stability of the Bose-Fermi
mixture with respect to collapse is crucially related to the value of the
interspecies s-wave scattering length.
\\ ( , 307kb)

The replacements:

Paper: cond-mat/0606672
replaced with revised version Fri, 2 Mar 2007 19:30:10 GMT (16kb)

Title: Shot noise of interference between independent atomic systems
Authors: Anatoli Polkovnikov
Categories: cond-mat.stat-mech cond-mat.dis-nn
Comments: 5 pages, 1 figure, final version, added a simple quantum-mechanical
   argument why two independent condensates with fixed number of particles in
   each must interfere in a generic experimental setup
Subj-class: Statistical Mechanics; Disordered Systems and Neural Networks
\\ ( , 16kb)
Paper: cond-mat/0611456
replaced with revised version Fri, 2 Mar 2007 14:23:24 GMT (508kb)

Title: Mean field theory and fluctuation spectrum of a pumped, decaying
   Bose-Fermi system across the quantum condensation transition
Authors: M. H. Szymanska, J. Keeling, P. B. Littlewood
Categories: cond-mat.other
Comments: 28 pages, 11 figures, revised version
Subj-class: Other
\\ ( , 508kb)
Paper: cond-mat/0703011
replaced with revised version Fri, 2 Mar 2007 20:08:05 GMT (457kb)

Title: Spin dynamics across the superfluid-insulator transition of spinful
Authors: Stephen Powell, Subir Sachdev
Categories: cond-mat.str-el cond-mat.supr-con
Comments: 43 pages (single-column format), 8 figures; v2: corrected discussion
   of fixed points in Section VI
Report-no: NSF-KITP-07-25
Subj-class: Strongly Correlated Electrons; Superconductivity
\\ ( , 457kb)
Paper: cond-mat/0610389
replaced with revised version Mon, 5 Mar 2007 15:39:37 GMT (85kb)

Title: Ultracold Bose Gases in 1D Random Potentials: From Lifshits Glasses to
   Bose-Einstein Condensates
Authors: Pierre Lugan (LCFIO), David Cl\'{e}ment (LCFIO), Philippe Bouyer
   (LCFIO), Alain Aspect (LCFIO), Maciej Lewenstein (ICFO), Laurent
   Sanchez-Palencia (LCFIO)
Categories: cond-mat.other
Comments: 4 pages; 3 figures; Several paragraphs have been reformulated to
   clarify some points without altering the results
Proxy: ccsd ccsd-00106356
Subj-class: Other
\\ ( , 85kb)
Paper: cond-mat/0610402
replaced with revised version Mon, 5 Mar 2007 12:06:12 GMT (147kb)

Title: Entanglement properties and moment distributions of a system of
   hard-core anyons on a ring
Authors: Raoul Santachiara, Franck Stauffer and Daniel Cabra
Categories: cond-mat.str-el cond-mat.mes-hall
Comments: 5 pages, 3 eps figures. v2: Fig 3 changed, Eq 13 changed, minor
   corrections. References added
Subj-class: Strongly Correlated Electrons; Mesoscopic Systems and Quantum Hall
\\ ( , 147kb)
Paper: cond-mat/0611357
replaced with revised version Mon, 5 Mar 2007 11:43:32 GMT (25kb)

Title: Bose-Einstein-condensed systems in random potentials
Authors: V.I. Yukalov and R. Graham
Categories: cond-mat.stat-mech
Comments: Latex file, final published variant
Subj-class: Statistical Mechanics
Journal-ref: Phys. Rev. A 75 (2007) 023619-16
\\ ( , 25kb)
Paper: cond-mat/0702058
replaced with revised version Fri, 2 Mar 2007 23:48:50 GMT (51kb)

Title: Negative sign of the interaction energy between condensed and depleted
   bosons in Bogoliubov's theory
Authors: A.M. Ettouhami (Univ. of Toronto)
Categories: cond-mat.stat-mech cond-mat.other
Comments: minor editorial changes; 5 pages, 1 figure
Subj-class: Statistical Mechanics; Other
\\ ( , 51kb)
Paper: cond-mat/0703003
replaced with revised version Fri, 2 Mar 2007 22:38:30 GMT (242kb)

Title: Bound State of Ultracold Fermions in the Spin Imbalanced Normal State
Authors: F. Fumarola, I.L. Aleiner and B.L. Altshuler
Categories: cond-mat.supr-con cond-mat.stat-mech physics.atom-ph
Comments: 5 pages, 4 figures
Subj-class: Superconductivity; Statistical Mechanics; Atomic Physics
\\ ( , 242kb)
Paper: physics/0701263
replaced with revised version Sat, 3 Mar 2007 03:52:14 GMT (648kb)

Title: Laser-trapping of Ra-225 and Ra-226 with repumping by room temperature
   blackbody radiation
Authors: J. R. Guest, N. D. Scielzo, I. Ahmad, K. Bailey, J. P. Greene, R. J.
   Holt, Z.-T. Lu, T. P. O'Connor, D. H. Potterveld
Categories: physics.atom-ph physics.optics
Comments: 4 pages, 4 figures, to be published in Phys. Rev. Lett; v2: shortened
   slightly; v3: added additional HFS theory numbers and references, final
Subj-class: Atomic Physics; Optics
Journal-ref: Phys. Rev. Lett. 98, 093001 (2007)
DOI: 10.1103/PhysRevLett.98.093001
\\ ( , 648kb)
Paper: cond-mat/0607102
replaced with revised version Tue, 6 Mar 2007 08:53:19 GMT (375kb)

Title: Observing the Formation of Long-range Order during Bose-Einstein
Authors: Stephan Ritter, Anton \"Ottl, Tobias Donner, Thomas Bourdel, Michael
   K\"ohl, Tilman Esslinger
Categories: cond-mat.stat-mech
Comments: 4 pages, 4 figures
Subj-class: Statistical Mechanics
Journal-ref: Phys. Rev. Lett. 98, 090402 (2007)
DOI: 10.1103/PhysRevLett.98.090402
\\ ( , 375kb)
Paper: physics/0611280
replaced with revised version Tue, 6 Mar 2007 09:34:10 GMT (68kb)

Title: Dipole-dipole instability of atom clouds in a far-detuned optical dipole
Authors: D. Nagy and P. Domokos
Categories: physics.atom-ph physics.optics
Comments: 8 pages, 3 figures
Subj-class: Atomic Physics; Optics
\\ ( , 68kb)
Paper: cond-mat/0611510
replaced with revised version Tue, 6 Mar 2007 23:40:29 GMT (680kb)

Title: Ground-state properties of the attractive one-dimensional Bose-Hubbard
Authors: Norman Oelkers and Jon Links
Categories: cond-mat.stat-mech
Comments: 17 pages, 12 figures, Phys.Rev.B(accepted), minor changes and updated
Subj-class: Statistical Mechanics
\\ ( , 680kb)
Paper: physics/0612143
replaced with revised version Wed, 7 Mar 2007 15:47:23 GMT (137kb)

Title: Dynamical interferences to probe short-pulse photoassociation of Rb
   atoms and stabilization of Rb$_2$ dimers
Authors: Jordi Mur-Petit, Eliane Luc-Koenig, Francoise Masnou-Seeuws
Categories: physics.atom-ph cond-mat.other quant-ph
Comments: 4 pages, 5 figures. v2: major changes in introduction, discussion
Subj-class: Atomic Physics; Other
\\ ( , 137kb)
Paper: cond-mat/0610162
replaced with revised version Thu, 8 Mar 2007 18:49:41 GMT (19kb)

Title: Discrete symmetries and 1/3-quantum vortices in condensates of F=2 cold
Authors: Gordon W. Semenoff and Fei Zhou (UBC)
Categories: cond-mat.other hep-th
Comments: 4 pages, 2 figures included; published version
Subj-class: Other
Journal-ref: Phys. Rev. Lett. 98, 100401 (2007)
\\ ( , 19kb)
Paper: cond-mat/0610221
replaced with revised version Thu, 8 Mar 2007 01:03:50 GMT (12kb)

Title: Bose-Einstein Condensation of Confined and Non-interacting Bose
   Particles by the Integral Representation of Bose Functions
Authors: Sang-Hoon Kim
Categories: cond-mat.stat-mech
Comments: 7 pages, 5 figures
Subj-class: Statistical Mechanics
\\ ( , 12kb)

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
views of the sender and not the views of the University of Queensland
Received on Fri Mar 16 2007 - 16:01:05 EST

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