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

Date: Fri, 16 Mar 2007 16:01:05 +1000 (EST)

Date: Fri, 16 Mar 2007 16:01:05 +1000 (EST)

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

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:

http://www.youtube.com/watch?v=FDHv9W0Awl4

Twenty-three new papers and eighteen replacements this week:

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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

profile.

\\ ( http://arXiv.org/abs/cond-mat/0703044 , 526kb)

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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.

\\ ( http://arXiv.org/abs/cond-mat/0703045 , 557kb)

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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.

\\ ( http://arXiv.org/abs/cond-mat/0703047 , 25kb)

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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

Electrons

\\

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.

\\ ( http://arXiv.org/abs/cond-mat/0703050 , 317kb)

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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.

\\ ( http://arXiv.org/abs/nucl-th/0703007 , 6kb)

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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.

\\ ( http://arXiv.org/abs/cond-mat/0703087 , 337kb)

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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.

\\ ( http://arXiv.org/abs/cond-mat/0703091 , 986kb)

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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.

\\ ( http://arXiv.org/abs/cond-mat/0703092 , 277kb)

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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.

\\ ( http://arXiv.org/abs/cond-mat/0703108 , 358kb)

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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

limit.

\\ ( http://arXiv.org/abs/cond-mat/0703117 , 76kb)

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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.

\\ ( http://arXiv.org/abs/cond-mat/0703123 , 525kb)

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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.

\\ ( http://arXiv.org/abs/quant-ph/0703031 , 728kb)

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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.

\\ ( http://arXiv.org/abs/quant-ph/0703040 , 321kb)

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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

Potential

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.

\\ ( http://arXiv.org/abs/cond-mat/0703160 , 895kb)

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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.

\\ ( http://arXiv.org/abs/cond-mat/0703163 , 333kb)

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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.

\\ ( http://arXiv.org/abs/hep-ph/0703042 , 22kb)

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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

Hamiltonians.

\\ ( http://arXiv.org/abs/quant-ph/0703044 , 2122kb)

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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.

\\ ( http://arXiv.org/abs/physics/0703067 , 20kb)

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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.

\\ ( http://arXiv.org/abs/cond-mat/0703169 , 234kb)

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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

array.

\\ ( http://arXiv.org/abs/cond-mat/0703171 , 300kb)

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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

cavity.

\\ ( http://arXiv.org/abs/quant-ph/0703065 , 825kb)

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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.

\\ ( http://arXiv.org/abs/cond-mat/0703200 , 672kb)

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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.

\\ ( http://arXiv.org/abs/cond-mat/0703205 , 232kb)

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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.

\\ ( http://arXiv.org/abs/cond-mat/0703211 , 5kb)

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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

http://www.theo-phys.uni-essen.de/tp/ags/pelster_dir/

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.

\\ ( http://arXiv.org/abs/cond-mat/0703220 , 307kb)

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The replacements:

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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

\\ ( http://arXiv.org/abs/cond-mat/0606672 , 16kb)

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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

\\ ( http://arXiv.org/abs/cond-mat/0611456 , 508kb)

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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

bosons

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

\\ ( http://arXiv.org/abs/cond-mat/0703011 , 457kb)

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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

\\ ( http://arXiv.org/abs/cond-mat/0610389 , 85kb)

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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

Effect

\\ ( http://arXiv.org/abs/cond-mat/0610402 , 147kb)

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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

\\ ( http://arXiv.org/abs/cond-mat/0611357 , 25kb)

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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

\\ ( http://arXiv.org/abs/cond-mat/0702058 , 51kb)

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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

\\ ( http://arXiv.org/abs/cond-mat/0703003 , 242kb)

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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

\\ ( http://arXiv.org/abs/physics/0701263 , 648kb)

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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

Condensation

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

\\ ( http://arXiv.org/abs/cond-mat/0607102 , 375kb)

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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

trap

Authors: D. Nagy and P. Domokos

Categories: physics.atom-ph physics.optics

Comments: 8 pages, 3 figures

Subj-class: Atomic Physics; Optics

\\ ( http://arXiv.org/abs/physics/0611280 , 68kb)

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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

model

Authors: Norman Oelkers and Jon Links

Categories: cond-mat.stat-mech

Comments: 17 pages, 12 figures, Phys.Rev.B(accepted), minor changes and updated

references

Subj-class: Statistical Mechanics

\\ ( http://arXiv.org/abs/cond-mat/0611510 , 680kb)

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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

clarified

Subj-class: Atomic Physics; Other

\\ ( http://arXiv.org/abs/physics/0612143 , 137kb)

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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

atoms

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)

\\ ( http://arXiv.org/abs/cond-mat/0610162 , 19kb)

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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

\\ ( http://arXiv.org/abs/cond-mat/0610221 , 12kb)

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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 Fri Mar 16 2007 - 16:01:05 EST

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