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

Date: Tue, 2 Jan 2007 16:12:24 +1000 (EST)

Date: Tue, 2 Jan 2007 16:12:24 +1000 (EST)

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

Hi everyone,

I had some time off in the last week and so didn't get to the weekly email. To

make up for it, today's email contains two weeks worth of abstracts for your

reading pleasure. A total of 36 new abstracts:

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Paper: cond-mat/0612376

Date: Thu, 14 Dec 2006 21:14:41 GMT (59kb)

Title: Expansion of a mesoscopic Fermi system from a harmonic trap

Authors: Pavel Nagornykh and Victor Galitski

Categories: cond-mat.mes-hall cond-mat.supr-con

Comments: 4 pages, 1 color figure

Subj-class: Mesoscopic Systems and Quantum Hall Effect; Superconductivity

\\

We study quantum dynamics of an atomic Fermi system with a finite number of

particles, N, after it is released from a harmonic trapping potential. We

consider two different initial states: The Fermi sea state and the paired state

described by the projection of the grand-canonical BCS wave function to the

subspace with a fixed number of particles. In the former case, we derive exact

and simple analytic expressions for the dynamics of particle density and

density-density correlation functions, taking into account the level

quantization and possible anisotropy of the trap. In the latter case of a

paired state, we obtain analytic expressions for the density and its

correlators in the leading order with respect to the ratio of the trap

frequency and the superconducting gap (the ratio assumed small). We discuss

several dynamic features, such as time evolution of the peak due to pair

correlations, which may be used to distinguish between the Fermi sea and the

paired state.

\\ ( http://arXiv.org/abs/cond-mat/0612376 , 59kb)

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Paper: cond-mat/0612388

Date: Fri, 15 Dec 2006 10:22:45 GMT (19kb)

Title: BEC in a star-comb graph

Authors: F. P. Mancini, P. Sodano and A. Trombettoni

Categories: cond-mat.stat-mech

Comments: Proceedings of the "Eleventh Training Course in the Physics of

Correlated Electron Systems and High-Tc Superconductors", Vietri sul Mare,

Italy, Oct 2006

Subj-class: Statistical Mechanics

\\

We investigate the properties of free bosons hopping on a star-comb network,

discussing the single-particle spectrum and the main thermodynamic equilibrium

properties: Bose-Einstein critical temperature, fraction of condensate, and

spatial boson distribution. We find an enhancement of the critical temperature

with respect to other inhomogeneous networks.

\\ ( http://arXiv.org/abs/cond-mat/0612388 , 19kb)

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Paper: quant-ph/0612128

Date: Fri, 15 Dec 2006 09:54:06 GMT (83kb)

Title: Entangling two atoms in spatially separated cavities through both photon

emission and absorption processes

Authors: Peng Peng, Fu-li Li

Comments: 12 pages, 4 figures

\\

We consider a system consisting of a $\Lambda$-type atom and a V-type atom,

which are individually trapped in two spatially separated cavities that are

connected by an optical fibre. We show that an extremely entangled state of the

two atoms can be deterministically generated through both photon emission of

the $\Lambda$-type atom and photon absorption of the V-type atom in an ideal

situation. The influence of various decoherence processes such as spontaneous

emission and photon loss on the fidelity of the entangled state is also

investigated. We find that the effect of photon leakage out of the fibre on the

fidelity can be greatly diminished in some special cases. As regards the effect

of spontaneous emission and photon loss from the cavities, we find that the

present scheme with a fidelity higher than 0.98 may be realized under current

experiment conditions.

\\ ( http://arXiv.org/abs/quant-ph/0612128 , 83kb)

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Paper: quant-ph/0612129

Date: Fri, 15 Dec 2006 11:09:36 GMT (111kb)

Title: Two-photon states generated from a continuous wave source

Authors: Anne E. B. Nielsen and Klaus Molmer

Categories: quant-ph

Comments: 10 pages, 9 figures

\\

Conditional preparation of two-photon states from a continuous wave

non-degenerate optical parametric oscillator is investigated. We derive the

phase space Wigner function for the output state conditioned on two nearby

photo detection events, and we maximize its overlap with a two-photon state by

varying the temporal output state mode function. In the low intensity limit, we

generalize to n-photon state production. We find a simple expression for the

conditional output, and from this we determine the optimal output state mode

function and n-photon state fidelity.

\\ ( http://arXiv.org/abs/quant-ph/0612129 , 111kb)

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Paper: cond-mat/0612415

Date: Fri, 15 Dec 2006 21:00:07 GMT (513kb)

Title: Hard-core bosons on optical superlattices: Dynamics and relaxation in

the superfluid and insulating regimes

Authors: Marcos Rigol, Alejandro Muramatsu, Maxim Olshanii

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

Comments: 14 pages, 17 figures, published version

Subj-class: Other; Statistical Mechanics

Journal-ref: Phys. Rev. A 74, 053616 (2006)

DOI: 10.1103/PhysRevA.74.053616

\\

We study the ground-state properties and nonequilibrium dynamics of hard-core

bosons confined in one-dimensional lattices in the presence of an additional

periodic potential (superlattice) and a harmonic trap. The dynamics is analyzed

after a sudden switch-on or switch-off of the superlattice potential, which can

bring the system into insulating or superfluid phases, respectively. A collapse

and revival of the zero-momentum peak can be seen in the first case. We study

in detail the relaxation of these integrable systems towards equilibrium. We

show how after relaxation time averages of physical observables, like the

momentum distribution function, can be predicted by means of a generalization

of the Gibbs distribution.

\\ ( http://arXiv.org/abs/cond-mat/0612415 , 513kb)

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Paper: cond-mat/0612417

Date: Mon, 18 Dec 2006 18:32:59 GMT (17kb)

Title: Dimer states in atomic mixtures

Authors: K. Ziegler

Categories: cond-mat.stat-mech

Comments: 4 pages, 1 figure

Subj-class: Statistical Mechanics

\\

A mixture of heavy atoms in a Mott state and light spin-1/2 fermionic atoms

is studied in an optical lattice. Scattering processes excite the heavy atoms

and generate an attraction between the light atoms. An effective Hamiltonian is

derived that describes tunneling of single fermions, tunneling of fermionic

pairs and an exchange of fermionic spins. An eigenstate of the last two

processes is found in form of an alternating dimer state. This state has a

global symmetry with respect to a discrete rotation of all dimers. Fluctuations

due to rotations of dimer clusters may lead to a transition to a dimer liquid

in frustrated optical lattices.

\\ ( http://arXiv.org/abs/cond-mat/0612417 , 17kb)

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Paper: cond-mat/0612436

Date: Sun, 17 Dec 2006 09:03:36 GMT (15kb)

Title: Complex Envelope Soliton in Bose-Einstein Condensate with Time Dependent

Scattering Length

Authors: Ayan Khan, Rajneesh Atre and Prasanta K. Panigrahi

Categories: cond-mat.other

Comments: 3 pages, 2 eps figures, To appear in the proceedings of Condensed

Matter Days - 2006

Subj-class: Other

\\

We elaborate on a general method to find complex envelope solitons in a cigar

shaped Bose-Einstein condensate in a trap. The procedure incorporates time

dependent scattering length, oscillator frequency and loss/gain. A variety of

time dependencies of the above parameters, akin to the ones occurring in the

experiments can be tackled.

\\ ( http://arXiv.org/abs/cond-mat/0612436 , 15kb)

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Paper: cond-mat/0612460

Date: Mon, 18 Dec 2006 16:20:44 GMT (24kb)

Title: Shear viscosity and damping for a Fermi gas in the unitarity limit

Authors: G. M. Bruun, H. Smith

Categories: cond-mat.stat-mech

Comments: 4 pages, 3 figures

Subj-class: Statistical Mechanics

\\

We calculate the shear viscosity of a two-component Fermi gas in the normal

phase as a universal function of temperature in the unitarity limit. Using a

microscopic Kubo approach, the importance of strong-coupling effects such as

the emergence of the pseudogap is examined. We demonstrate how recent

experimental results on the damping of collective modes in the unitarity limit

can be understood in terms of viscous damping when the gas is in the

collisional hydrodynamic regime.

\\ ( http://arXiv.org/abs/cond-mat/0612460 , 24kb)

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Paper: cond-mat/0612464

Date: Mon, 18 Dec 2006 18:08:32 GMT (12kb)

Title: Two-body correlations and the superfluid fraction for nonuniform systems

Authors: Wayne M. Saslow, Davide E. Galli, and Luciano Reatto

Categories: cond-mat.stat-mech

Comments: 13 pages

Subj-class: Statistical Mechanics

\\

We extend the one-body phase function upper bound on the superfluid fraction

in a periodic solid (a spatially ordered supersolid) to include two-body phase

correlations. The one-body current density is no longer proportional to the

gradient of the one-body phase times the one-body density, but rather it

depends also on two-body correlation functions. The equations that

simultaneously determine the one-body and two-body phase functions require a

knowledge of one-, two-, and three-body correlation functions. The approach can

also be extended to disordered solids. Fluids, with two-body densities and

two-body phase functions that are translationally invariant, cannot take

advantage of this additional degree of freedom to lower their energy.

\\ ( http://arXiv.org/abs/cond-mat/0612464 , 12kb)

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Paper: cond-mat/0612465

Date: Mon, 18 Dec 2006 19:41:04 GMT (133kb)

Title: Reconstruction of the finite size canonical ensemble from incomplete

micro-canonical data

Authors: P. H. Lundow, K. Markstr\"om

Categories: cond-mat.stat-mech

Comments: 19 pages

Subj-class: Statistical Mechanics

\\

In this paper we discuss how partial knowledge of the density of states for a

model can be used to give good approximations of the energy distributions in a

given temperature range. From these distributions one can then obtain the

statistical moments corresponding to eg the internal energy and the specific

heat. These questions have gained interest apropos of several recent methods

for estimating the density of states of spin models. As a worked example we

finally apply these methods to the 3-state Potts model for cubic lattices of

linear order up to 128. We give estimates of eg latent heat and critical

temperature, as well as the microcanonical properties of interest.

\\ ( http://arXiv.org/abs/cond-mat/0612465 , 133kb)

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Paper: quant-ph/0612138

Date: Sat, 16 Dec 2006 03:38:17 GMT (362kb)

Title: An ultrahigh Finesse Fabry-Perot superconducting resonator as a photon

box for cavity-QED experiments

Authors: Stefan Kuhr, S\'{e}bastien Gleyzes (LKB - Lhomond), Christine Guerlin

(LKB - Lhomond), Julien Bernu (LKB - Lhomond), Ulrich Busk Hoff (LKB -

Lhomond), Samuel Del\'{e}glise (LKB - Lhomond), Michel Brune (LKB - Lhomond),

Jean-Michel Raimond (LKB - Lhomond), Serge Haroche (LKB - Lhomond), Stefano

Osnaghi (LKB - Lhomond), E. Jacques (DAPNIA), P. Bosland (DAPNIA), B.

Visentin (DAPNIA)

Categories: quant-ph

Proxy: ccsd hal-00120654

\\

We have built a microwave Fabry-Perot resonator made of diamond-machined

copper mirrors coated with superconducting niobium. Its damping time (Tc = 130

ms at 51 GHz and 0.8 K) corresponds to a finesse of 4.6 e9, the highest ever

reached for a Fabry-Perot in any frequency range. We have tested this resonator

by sending across it two circular Rydberg atoms, the first emitting a photon

and the second absorbing it after a delay of 1/10 s. This long storage time

photon box opens novel perspectives for quantum information. It can be used to

perform sequences of hundreds of gate operations on individual atomic qubits. A

set-up with one or two photon boxes can store mesoscopic fields made of

hundreds of photons for decoherence and non-locality studies.

\\ ( http://arXiv.org/abs/quant-ph/0612138 , 362kb)

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Paper: physics/0612163

Date: Sat, 16 Dec 2006 12:36:49 GMT (501kb)

Title: A supersonic beam of cold lithium hydride molecules

Authors: S. K. Tokunaga, J. O. Stack, J. J. Hudson, B. E. Sauer, E. A. Hinds

and M. R. Tarbutt

Categories: physics.atom-ph

Comments: 8 pages, 6 figures

Subj-class: Atomic Physics

\\

We have developed a source of cold LiH molecules for Stark deceleration and

trapping experiments. Lithium metal is ablated from a solid target into a

supersonically expanding carrier gas. The translational, rotational and

vibrational temperatures are 0.9(0.1) K, 5.9(0.5) K and 468(17) K respectively.

Although they have not reached thermal equilibrium with the carrier gas, we

estimate that 90% of the LiH molecules are in the ground state, X^{1}

\Sigma^{+} (v=0, J=0). With a single 7 ns ablation pulse, the number of

molecules in the ground state is 4.5(1.8)*10^{7} molecules per steradian. A

second, delayed, ablation pulse produces another LiH beam in a different part

of the same gas pulse, thereby almost doubling the signal. A long pulse,

lasting 150 microseconds, can make the beam up to 15 times more intense.

\\ ( http://arXiv.org/abs/physics/0612163 , 501kb)

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Paper: physics/0612162

Date: Sat, 16 Dec 2006 11:36:27 GMT (166kb)

Title: Tasting edge effects

Authors: Lyderic Bocquet

Categories: physics.ed-ph physics.gen-ph

Comments: to appear in American Journal of Physics

Subj-class: Physics Education; General Physics

\\

We show that the baking of potato wedges constitutes a crunchy example of

edge effects, which are usually demonstrated in electrostatics. A simple model

of the diffusive transport of water vapor around the potato wedges shows that

the water vapor flux diverges at the sharp edges in analogy with its

electrostatic counterpart. This increased evaporation at the edges leads to the

crispy taste of these parts of the potatoes.

\\ ( http://arXiv.org/abs/physics/0612162 , 166kb)

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Paper: cond-mat/0612479

Date: Tue, 19 Dec 2006 10:30:46 GMT (116kb)

Title: Fractional Quantum Hall States in Fast Rotating Bose Gases

Authors: A. Lakhoua, T. Masson, J.C. Wallet

Categories: cond-mat.mes-hall

Subj-class: Mesoscopic Systems and Quantum Hall Effect

\\

We use a Chern Simons Landau-Ginzburg (CSLG) framework related to hierarchies

of composite bosons to describe 2D harmonically trapped fast rotating Bose

gases in Fractional Quantum Hall Effect (FQHE) states. The predicted values for

$\nu$ (ratio of particle to vortex numbers) are $\nu$$=$${{p}\over{q}}$ ($p$,

$q$ are any integers) with even product $pq$, including numerically favored

values previously found and predicting a richer set of values. We show that

those values can be understood from a bosonic analog of the law of the

corresponding states relevant to the electronic FQHE. A tentative global phase

diagram for the bosonic system for $\nu$$<$1 is also proposed.

\\ ( http://arXiv.org/abs/cond-mat/0612479 , 116kb)

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Paper: cond-mat/0612496

Date: Tue, 19 Dec 2006 18:10:49 GMT (42kb)

Title: Imbalanced Fermi-Fermi mixtures in optical lattices

Authors: M. Iskin and C. A. R. Sa de Melo

Categories: cond-mat.supr-con cond-mat.other

Comments: 4 pages with 3 figures

Subj-class: Superconductivity; Other

\\

The ground state phase diagram of imbalanced Fermi-Fermi mixtures in optical

lattices is analyzed as a function of interaction strength, population

imbalance, filling fraction and tunneling parameters. It is shown that

population imbalanced Fermi-Fermi mixtures reduce to strongly interacting

Bose-Fermi mixtures in the molecular limit, in sharp contrast with homogenous

systems where the resulting Bose-Fermi mixture is weakly interacting.

Furthermore, insulating phases are found in optical lattices of Fermi-Fermi

mixtures in addition to the standard phase-separated or coexisting

superfluid/excess-fermion phases found in homogeneous systems. The insulating

states can be a molecular Bose-Mott insulator (BMI), a Fermi-Pauli insulator

(FPI), phase-separated BMI/FPI mixture or a Bose-Fermi checkerboard (BFC).

\\ ( http://arXiv.org/abs/cond-mat/0612496 , 42kb)

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Paper: cond-mat/0612498

Date: Tue, 19 Dec 2006 18:53:06 GMT (101kb)

Title: Metastable states of a gas of dipolar bosons in a 2D optical lattice

Authors: C. Menotti, C. Trefzger, and M.Lewenstein

Categories: cond-mat.other cond-mat.dis-nn

Comments: 4 pages, 4 figures

Subj-class: Other; Disordered Systems and Neural Networks

\\

We investigate the physics of dipolar bosons in a two dimensional optical

lattice. It is known that due to the long-range character of dipole-dipole

interaction, the ground state phase diagram of a gas of dipolar bosons in an

optical lattice presents novel quantum phases, like checkerboard and supersolid

phases. In this paper, we consider the properties of the system beyond its

ground state, finding that it is characterised by a multitude of almost

degenerate metastable states, often competing with the ground state. This makes

dipolar bosons in a lattice similar to a disordered system and opens

possibilities of using them for quantum memories.

\\ ( http://arXiv.org/abs/cond-mat/0612498 , 101kb)

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Paper: cond-mat/0612499

Date: Tue, 19 Dec 2006 18:34:06 GMT (254kb)

Title: What makes a crystal supersolid ?

Authors: Nikolay Prokof'ev

Categories: cond-mat.dis-nn cond-mat.stat-mech

Comments: Perspective to appear in Advances in Physics, 25 pages, 7 figures

Subj-class: Disordered Systems and Neural Networks; Statistical Mechanics

\\

For nearly half a century the supersolid phase of matter has remained

mysterious, not only eluding experimental observation, but also generating a

great deal of controversy among theorists. Recent discovery of what is

interpreted as a non-classical moment of inertia at low temperature in solid

He-4 has elicited much excitement as a possible first observation of a

supersolid phase. In the two years following the discovery, however, more

puzzles than answers have been provided to the fundamental issue of whether the

supersolid phase exists, in helium or any other naturally occurring condensed

matter system. Presently, there is no established theoretical framework to

understand the body of experimental data on He-4. Different microscopic

mechanisms that have been suggested to underlie superfluidity in a perfect

quantum crystal do not seem viable for \he4, for which a wealth of experimental

and theoretical evidence points to an insulating crystalline ground state. This

perspective addresses some of the outstanding problems with the interpretation

of recent experimental observations of the apparent superfluid response in He-4

(seen now by several groups) and discusses various scenarios alternative to the

homogeneous supersolid phase, such as superfluidity induced by extended defects

of the crystalline structure which include grain boundaries, dislocations,

anisotropic stresses, etc. Can a metastable superfluid "glassy" phase exist,

and can it be relevant to some of the experimental observations ? One of the

most interesting and unsolved fundamental questions is what interatomic

potentials, given the freedom to design one, can support an ideal supersolid

phase in continuous space, and can they be found in Nature.

\\ ( http://arXiv.org/abs/cond-mat/0612499 , 254kb)

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Paper: physics/0612182

Date: Tue, 19 Dec 2006 09:38:53 GMT (239kb)

Title: Dimension of holes and high-temperature condensate in Bose--Einstein

statistics

Authors: V. P. Maslov

Categories: physics.gen-ph

Comments: 14 pages, 3 figures

Subj-class: General Physics

\\

We introduce the notion of weight for the lattice dimension and the notion of

topological dimension -- hole dimension. The condensate in Bose-holes exists in

the case when temperature in not low.

\\ ( http://arXiv.org/abs/physics/0612182 , 239kb)

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Paper: cond-mat/0612505

Date: Tue, 19 Dec 2006 22:13:17 GMT (921kb)

Title: Supersolidity is Dirty

Authors: Jiansheng Wu and Philip Phillips

Categories: cond-mat.dis-nn cond-mat.supr-con

Comments: 4 pages, 2 .eps figures

Subj-class: Disordered Systems and Neural Networks; Superconductivity

\\

A microscopic model for the supersolid phase in $^4$He is given. On a grain

boundary, atom motion is well described by a disordered Bose-Hubbard model. We

argue that the clean system is a commensurate Mott insulator but in the

presence of disorder, a supersolid state obtains. At work is the

disorder-induced closing of the Mott gap. We find that the transition

temperature to the supersolid state is an increasing function of disorder as is

seen experimentally. We also find that a glassy phase mediated by disorder

possesses a period shift, though it lacks superflow. This latter observation is

relevant to solid hydrogen in which a period shift is observed without

superflow.

\\ ( http://arXiv.org/abs/cond-mat/0612505 , 921kb)

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Paper: cond-mat/0612508

Date: Wed, 20 Dec 2006 01:59:34 GMT (257kb)

Title: Using modified Gaussian distribution to study the physical properties of

one and two-component ultracold atoms

Authors: C. C. Huang and W. C. Wu

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

Comments: 7 pages, 7 figures, accepted for publication in Phys. Rev. A

Subj-class: Other; Statistical Mechanics

\\

Gaussian distribution is commonly used as a good approximation to study the

trapped one-component Bose-condensed atoms with relatively small nonlinear

effect. It is not adequate in dealing with the one-component system of large

nonlinear effect, nor the two-component system where phase separation exists.

We propose a modified Gaussian distribution which is more effective when

dealing with the one-component system with relatively large nonlinear terms as

well as the two-component system. The modified Gaussian is also used to study

the breathing modes of the two-component system, which shows a drastic change

in the mode dispersion at the occurrence of the phase separation. The results

obtained are in agreement with other numerical results.

\\ ( http://arXiv.org/abs/cond-mat/0612508 , 257kb)

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Paper: cond-mat/0612522

Date: Wed, 20 Dec 2006 13:03:54 GMT (24kb)

Title: Mott-insulator phases of non-locally coupled 1D dipolar Bose gases

Authors: A. Arguelles and L. Santos

Categories: cond-mat.other

Comments: 4 pages, 4 eps figures

Subj-class: Other

\\

We analyze the Mott-insulator phases of dipolar bosonic gases placed in

neighboring but unconnected 1D traps. Whereas for short-range interactions the

1D systems are independent, the non-local dipole-dipole interaction induces a

direct Mott-insulator to pair-superfluid transition which significantly

modifies the boundaries of the lowest Mott-insulator phases. The lowest

boundary of the lowest Mott regions becomes progressively constant as a

function of the hopping rate, eventually inverting its slope, leading to a

re-entrant configuration which is retained in 2D. We discuss the consequences

of this effect on the spatial Mott-insulator plateaux in experiments with

additional harmonic confinement, showing that anti-intuitively the plateaux may

become wider for increasing hopping. Our results are also applicable to

non-dipolar boson-boson mixtures.

\\ ( http://arXiv.org/abs/cond-mat/0612522 , 24kb)

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Paper: cond-mat/0612524

Date: Wed, 20 Dec 2006 13:24:00 GMT (70kb)

Title: Confinement effects on the stimulated dissociation of molecular BECs

Authors: I. Tikhonenkov and A. Vardi

Categories: cond-mat.other

Comments: 4 pages, 4 figures

Subj-class: Other

\\

We show that a molecular BEC in a trap is stabilized against stimulated

dissociation if the trap size is smaller than the resonance healing length

$(\hbar^2/2mg\sqrt{n})^{1/2}$. The condensate shape determines the critical

atom-molecule coupling frequency. We discuss an experiment for triggering

dissociation by a sudden change of coupling or trap parameters. This effect

demonstrates one of the unique collective features of 'superchemistry' in that

the yield of a chemical reaction depends critically on the size and shape of

the reaction vessel.

\\ ( http://arXiv.org/abs/cond-mat/0612524 , 70kb)

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Paper (*cross-listing*): nucl-th/0612086

Date: Tue, 19 Dec 2006 14:43:10 GMT (141kb)

Title: Effective Field Theory for Dilute Fermions with Pairing

Authors: R.J. Furnstahl, H.-W. Hammer, S.J. Puglia

Categories: cond-mat.supr-con

Comments: 31 pages, 10 figures

Report-no: HISKP-TH-06-40

Subj-class: Nuclear Theory; Superconductivity

\\

Effective field theory (EFT) methods for a uniform system of fermions with

short-range, natural interactions are extended to include pairing correlations,

as part of a program to develop a systematic Kohn-Sham density functional

theory (DFT) for medium and heavy nuclei. An effective action formalism for

local composite operators leads to a free-energy functional that includes

pairing by applying an inversion method order-by-order in the EFT expansion. A

consistent renormalization scheme is demonstrated for the uniform system

through next-to-leading order, which includes induced-interaction corrections

to pairing.

\\ ( http://arXiv.org/abs/nucl-th/0612086 , 141kb)

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Paper: cond-mat/0612544

Date: Thu, 21 Dec 2006 12:14:42 GMT (166kb)

Title: Ground states of hard-core bosons in one dimensional periodic potentials

Authors: Yuan Lin and Biao Wu

Categories: cond-mat.other

Comments: 5 pages, 5 figures

Subj-class: Other

\\

With Girardeau's Fermi-Bose mapping, we find the exact ground states of

hard-core bosons residing in a one dimensional periodic potential. The analysis

of these ground states shows that when the number of bosons $N$ is commensurate

with the number of wells $M$ in the periodic potential, the boson system is a

Mott insulator whose energy gap, however, is given by the single-particle band

gap of the periodic potential; when $N$ is not commensurate with $M$, the

system is a metal (not a superfluid). The Kronig-Penney potential is used to

illustrate our results.

\\ ( http://arXiv.org/abs/cond-mat/0612544 , 166kb)

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Paper: cond-mat/0612565

Date: Thu, 21 Dec 2006 19:11:01 GMT (155kb)

Title: Novel quantum phases of dipolar Bose gases in optical lattices

Authors: S. Yi, T. Li, C. P. Sun

Categories: cond-mat.other

Comments: 4 pages, 4 figures

Subj-class: Other

\\

We investigate the quantum phases of dipolar Bose gases loaded into a two

dimension square and three dimension cubic optical lattices. We show that the

long-range and anisotropic nature of the dipole-dipole interaction induces a

rich variety of quantum phases, including the supersolid and striped supersolid

phases in 2D lattices, and the layered supersolid phase in 3D lattices.

\\ ( http://arXiv.org/abs/cond-mat/0612565 , 155kb)

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Paper: quant-ph/0612180

Date: Thu, 21 Dec 2006 15:10:30 GMT (891kb)

Title: Designing spin-1 lattice models using polar molecules

Authors: Gavin K. Brennen, Andrea Micheli, and Peter Zoller

Comments: 24 pages, 5 figures

\\

We describe how to design a large class of always on spin-1 interactions

between polar molecules trapped in an optical lattice. The spin degrees of

freedom correspond to the hyperfine levels of a ro-vibrational ground state

molecule. Interactions are induced using a microwave field to mix ground states

in one hyperfine manifold with the spin entangled dipole-dipole coupled excited

states. Using multiple fields anistropic models in one, two, or three

dimensions, can be built with tunable spatial range. An illustrative example in

one dimension is the generalized Haldane model, which at a specific parameter

has a gapped valence bond solid ground state. The interaction strengths are

large compared to decoherence rates and should allow for probing the rich phase

structure of strongly correlated systems, including dimerized and gapped

phases.

\\ ( http://arXiv.org/abs/quant-ph/0612180 , 891kb)

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Paper: cond-mat/0612567

Date: Thu, 21 Dec 2006 21:53:20 GMT (50kb)

Title: Sound propagation in a Fermi gas near a Feshbach resonance

Authors: J. Joseph, B. Clancy, L. Luo, J. Kinast, A. Turlapov, and J. E. Thomas

Categories: cond-mat.other

Comments: 4 pages, 5 figures

Subj-class: Other

\\

Sound waves are observed and studied in an optically trapped degenerate Fermi

gas of spin-up and spin-down atoms with magnetically tunable interactions.

Measurements are made throughout the crossover region, from a

weakly-interacting Fermi gas through the resonant Fermi superfluid regime to a

Bose condensate of dimer molecules. The measured sound velocities test the

equation of state and confirm the universal hypothesis.

\\ ( http://arXiv.org/abs/cond-mat/0612567 , 50kb)

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Paper: cond-mat/0612572

Date: Fri, 22 Dec 2006 15:10:02 GMT (31kb)

Title: Stable and unstable regimes in Bose-Fermi mixture with attraction

between components

Authors: A.M. Belemuk, S.-T. Chui, V. N. Ryzhov

Categories: cond-mat.stat-mech cond-mat.dis-nn

Comments: 7 pages, 5 figures

Subj-class: Statistical Mechanics; Disordered Systems and Neural Networks

\\

A collapse of the trapped boson- fermion mixture with the attraction between

bosons and fermions is investigated in the framework of the effective

Hamiltonian for the Bose system. The properties of the $^{87}$Rb and $^{40}$K

mixture are analyzed quantitatively at $T= 0$. We find numerically solutions of

modified Gross- Pitaevskii equation which continuously go from stable to

unstable branch. We discuss the relation of the onset of collapse with

macroscopic properties of the system. A comparison with the case of a Bose

condensate of atomic $^7Li$ system is given.

\\ ( http://arXiv.org/abs/cond-mat/0612572 , 31kb)

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\\

Paper: cond-mat/0612590

Date: Fri, 22 Dec 2006 14:45:11 GMT (103kb)

Title: Ground-State Fidelity and Bipartite Entanglement in the Bose-Hubbard

Model

Authors: Pierfrancesco Buonsante and Alessandro Vezzani

Categories: cond-mat.other

Comments: 7 pages, 5 figures (endfloats used due to problems with figures and

latex. Sorry about that)

Subj-class: Other

\\

We analyze the quantum phase transition in the Bose-Hubbard model borrowing

two tools from Quantum Information Theory, i.e. the ground-state fidelity and

entanglement measures. We consider systems at unitary filling comprising up to

50 sites and show for the first time that a finite-size scaling analysis in

terms of these quantities provides excellent estimates for the quantum critical

point.

We conclude that fidelity is particularly suited for revealing a quantum

phase transition and pinning down the critical point thereof, while

entanglement measures give a deeper insight into the mechanisms governing the

transition.

\\ ( http://arXiv.org/abs/cond-mat/0612590 , 103kb)

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\\

Paper: cond-mat/0612592

Date: Fri, 22 Dec 2006 15:36:10 GMT (36kb)

Title: Wigner Crystallization in Fast Rotating 2D Dipolar Fermi Gases

Authors: M.A. Baranov, H. Fehrmann, and M. Lewenstein

Categories: cond-mat.mes-hall

Comments: 4 pages, 3 figures

Subj-class: Mesoscopic Systems and Quantum Hall Effect

\\

We study the competition between the Wigner crystal and the Laughlin liquid

states in an ultracold quasi two-dimensional rapidly rotating polarized dipolar

fermionic gas, and find that below a critical filling factor, the Wigner

crystal has a lower energy. We examine the corresponding quantum crystal

melting transition for different confinements of the gas in the third

direction. Our analysis of the phonon spectra of the Wigner crystal with the

account of phonon-phonon interactions also shows the stability of the Wigner

crystal for sufficiently low filling factors (\nu <1/7).

\\ ( http://arXiv.org/abs/cond-mat/0612592 , 36kb)

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\\

Paper: cond-mat/0612601

Date: Fri, 22 Dec 2006 19:57:24 GMT (200kb)

Title: Universality Constraints on Three-Body Recombination for Cold Atoms:

from 4He to 133Cs

Authors: Eric Braaten, Daekyoung Kang, Lucas Platter

Categories: cond-mat.other

Comments: 17 pages, 6 eps figures

Subj-class: Other

\\

For atoms with large scattering length, the dependence of the 3-body

recombination rate on the collision energy is determined by the scattering

length and the Efimov 3-body parameters and can be expressed in terms of

universal functions of a single scaling variable. We use published results on

the 3-body recombination rate for 4He atoms to constrain the universal

functions. We then use those universal functions to calculate the 3-body

recombination rate for other atoms with large scattering length at nonzero

temperature. The constraints from the 4He results are strong if the scattering

length is near the minimum of the 3-body recombination rate at threshold. We

apply our results to 133Cs atoms with a large positive scattering length, and

compare them with experimental results from the Innsbruck group.

\\ ( http://arXiv.org/abs/cond-mat/0612601 , 200kb)

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\\

Paper: quant-ph/0612189

Date: Fri, 22 Dec 2006 01:45:04 GMT (329kb)

Title: Semiclassical limits to the linewidth of an atom laser

Authors: Mattias Johnsson, Simon Haine, Joseph Hope, Nick Robins, Cristina

Figl, Matthew Jeppesen, Julien Dugu\'{e}, John Close

Categories: quant-ph

Comments: 9 Figures

\\

We investigate the linewidth of a quasi-continuous atom laser within a

semiclassical framework. In the high flux regime, the lasing mode can exhibit a

number of undesirable features such as density fluctuations. We show that the

output therefore has a complicated structure that can be somewhat simplified

using Raman outcoupling methods and energy-momentum selection rules. In the

weak outcoupling limit, we find that the linewidth of an atom laser is

instantaneously Fourier limited, but, due to the energy `chirp' associated with

the draining of a condensate, the long-term linewidth of an atom laser is

equivalent to the chemical potential of the condensate source. We show that

correctly sweeping the outcoupling frequency can recover the Fourier-limited

linewidth.

\\ ( http://arXiv.org/abs/quant-ph/0612189 , 329kb)

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\\

Paper: quant-ph/0612191

Date: Fri, 22 Dec 2006 03:21:43 GMT (50kb)

Title: Multimode quantum limits to the linewidth of an atom laser

Authors: Mattias T. Johnsson and Joseph J. Hope

Comments: 8 Figures

\\

The linewidth of an atom laser can be limited by excitation of higher energy

modes in the source Bose-Einstein condensate, energy shifts in that condensate

due to the atomic interactions, or phase diffusion of the lasing mode due to

those interactions. The first two are effects that can be described with a

semiclassical model, and have been studied in detail for both pumped and

unpumped atom lasers. The third is a purely quantum statistical effect, and has

been studied only in zero dimensional models. We examine an unpumped atom laser

in one dimension using a quantum field theory using stochastic methods based on

the truncated Wigner approach. This allows spatial and statistical effects to

be examined simultaneously, and the linewidth limit for unpumped atom lasers is

quantified in various limits.

\\ ( http://arXiv.org/abs/quant-ph/0612191 , 50kb)

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\\

Paper: quant-ph/0612200

Date: Fri, 22 Dec 2006 17:40:50 GMT (254kb)

Title: Coherent optical detection of highly excited Rydberg states using

electromagnetically induced transparency

Authors: A. K. Mohapatra, T. R. Jackson, C. S. Adams

Categories: quant-ph

Comments: Submitted to Physical Review Letters

\\

We observe electromagnetically induced transparency (EIT) on the 5s to 5p

transition in a room temperature rubidium vapour cell by coupling the 5p state

to a Rydberg state (ns or nd with n=26 to 124). We demonstrate that the narrow

line-width of the EIT resonance (2 MHz) allows precise measurement of the d

state fine structure splitting, and together with the sensitivity of the

Rydberg state to electric fields, we are able to detect transient electric

fields produced by the dynamics of charges within the cell. Coherent coupling

of Rydberg states via EIT could also be used for cross-phase modulation and

photon entanglement.

\\ ( http://arXiv.org/abs/quant-ph/0612200 , 254kb)

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\\

Paper: cond-mat/0612613

Date: Sun, 24 Dec 2006 10:13:14 GMT (304kb)

Title: Basic theory tools for degenerate Fermi gases

Authors: Yvan Castin (LKB - Lhomond)

Categories: cond-mat.other

Comments: 60 pages, Proceedings of the Enrico Fermi Varenna School on Fermi

gases (2006)

Proxy: ccsd hal-00122049

Subj-class: Other

\\

This is an introductory lecture to the theory of degenerate Fermi gases, in

the context of present experiments on atomic Fermi gases. In part one, some

properties of the ideal Fermi gas are presented, including a discussion of the

fluctuations of the number of fermions in a given spatial zone in 1D, 2D and

3D. In part two, two-body aspects of the interaction potential are discussed

and several possible models for the interaction are analyzed, including the

two-channel model for the Feshbach resonance. In part three, basic predictions

of zero temperature BCS theory are presented, including a derivation of

superfluid hydrodynamic equations from time dependent BCS theory.

\\ ( http://arXiv.org/abs/cond-mat/0612613 , 304kb)

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\\

Paper: cond-mat/0612616

Date: Sun, 24 Dec 2006 16:52:04 GMT (65kb)

Title: Role of excited states in the splitting dynamics of interacting

Bose-Einstein condensates when rumping-up a barrier

Authors: Alexej I. Streltsov, Ofir E. Alon and Lorenz S. Cederbaum

Categories: cond-mat.other

Comments: 11 pages, 3 figures

Subj-class: Other

\\

An essentially-exact approach to compute the wavefunction in the

time-dependent many-boson Schr\"odinger equation is derived and employed to

study accurately the process of splitting a trapped condensate when rumping-up

a barrier such that a double-well is formed. We follow the role played by

many-body excited states during the splitting process. Among others, a

'counter-intuitive' regime is found in which the evolution of the condensate

when the barrier is rumped-up sufficiently slow {\it is not} to the

ground-state which is a fragmented condensate, but to a low-lying excited-state

which is a coherent condensate. Experimental implications are discussed.

\\ ( http://arXiv.org/abs/cond-mat/0612616 , 65kb)

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\\

Paper: quant-ph/0612201

Date: Sun, 24 Dec 2006 00:10:55 GMT (267kb)

Title: Decoherence-induced geometric phase in a multilevel atomic system

Authors: Shubhrangshu Dasgupta and Daniel A. Lidar (USC)

Categories: quant-ph

Comments: 9 pages, 12 figures

\\

We consider the STIRAP process in a three-level atom. Viewed as a closed

system, no geometric phase is acquired. But in the presence of spontaneous

emission and/or collisional relaxation we show numerically that a

non-vanishing, purely real, geometric phase is acquired during STIRAP, whose

magnitude grows with the decay rates. Rather than viewing this

decoherence-induced geometric phase as a nuisance, it can be considered an

example of "beneficial decoherence": the environment provides a mechanism for

the generation of geometric phases which would otherwise require an extra

experimental control knob.

\\ ( http://arXiv.org/abs/quant-ph/0612201 , 267kb)

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\\

Paper: quant-ph/0612213

Date: Tue, 26 Dec 2006 21:42:12 GMT (889kb)

Title: Control of the geometric phase and pseudo-spin dynamics on coupled

Bose-Einstein condensates

Authors: E.I. Duzzioni, L. Sanz, S.S. Mizrahi and M.H.Y. Moussa

Categories: quant-ph

Comments: 1 tex file and 11 figures in pdf format

\\

We describe the behavior of two coupled Bose-Einstein condensates in

time-dependent (TD) trap potentials and TD Rabi (or tunneling) frequency, using

the two-mode approach. Starting from Bloch states, we succeed to get analytical

solutions for the TD Schroedinger equation and present a detailed analysis of

the relative and geometric phases acquired by the wave function of the

condensates, as well as their population imbalance. We also establish a

connection between the geometric phases and constants of motion which

characterize the dynamic of the system. Besides analyzing the affects of

temporality on condensates that differs by hyperfine degrees of freedom

(internal Josephson effect), we also do present a brief discussion of a one

specie condensate in a double-well potential

(external Josephson effect).

\\ ( http://arXiv.org/abs/quant-ph/0612213 , 889kb)

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\\

Paper: quant-ph/0612214

Date: Wed, 27 Dec 2006 07:35:06 GMT (502kb)

Title: Controllable Majorana transition in spinor Bose-Einstein condensates

Authors: Lin Xia, Xu Xu, Fan Yang, Wei Xiong, Juntao Li, Qianli Ma, Xiaoji

Zhou, Hong Guo and Xuzong Chen

Categories: quant-ph

Comments: 5 pages, 5 figures

\\

Controllable Majorana transition in spinor BEC system has been realized by

altering the rotation frequency of the magnetic fleld's direction. The

population of spinor states can be conveniently manipulated by adjusting the

turn-off time of the trap coils in experiment, which provides a new tool to

manipulate quantum states. Using the Majorana transition process on pulsed atom

laser, multicomponent spinor atom laser is generated. We demonstrate that the

experiment results are agreed with the theoretical predication.

\\ ( http://arXiv.org/abs/quant-ph/0612214 , 502kb)

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\\

Paper: physics/0612233

Date: Sat, 23 Dec 2006 21:26:24 GMT (86kb)

Title: Enhancement of Rydberg atom interactions using ac Stark shifts

Authors: P. Bohlouli-Zanjani, J. A. Petrus, J. D. D. Martin

Categories: physics.atom-ph

Subj-class: Atomic Physics

\\

The ac Stark effect was used to induce resonant energy transfer between

translationally cold Rydberg atoms. The Rb Rydberg atoms were obtained by laser

excitation of cold atoms from a magneto-optical trap. Using two-photon

microwave spectroscopy of the 49s_{1/2}-50s_{1/2} transition, the field

strength of a 28.5 GHz dressing field was calibrated. When this dressing field

was set at specific field strengths, the two-atom dipole-dipole process

43d_{5/2} + 43d_{5/2} -> 45p_{3/2} + 41f was dramatically enhanced, due to

induced degeneracy of the initial and final states. A series of observed

resonant field strengths correspond to different magnetic sublevel

possibilities for the initial and final states. These agree well with

calculated resonance fields based on a perturbative ac Stark shift formula.

This method for enhancing interactions is complementary to dc

electric-field-induced resonant energy transfer, but has more flexibility due

to the possibility of varying the applied frequency.

\\ ( http://arXiv.org/abs/physics/0612233 , 86kb)

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\\

Paper: physics/0612235

Date: Sun, 24 Dec 2006 07:33:33 GMT (84kb)

Title: Rubidium lifetime in a dark magneto-optical trap

Authors: O.I.Permyakova, A.V.Yakovlev, P.L.Chapovsky

Categories: physics.atom-ph

Comments: 12 pages, 4 figures

Subj-class: Atomic Physics

\\

Measurements of rubidium lifetime in a dark magneto-optical trap (DMOT) was

performed at various populations of the bright and dark hyperfine states of the

trapped atoms. The rubidium lifetime in the trap appeared to be shorter if the

atom spent more time in the bright state. A simple explanation of this effect

is based on the increase of the cross-section of rubidium collisions with the

surrounding warm atoms upon rubidium electronic excitation.

\\ ( http://arXiv.org/abs/physics/0612235 , 84kb)

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\\

Paper: cond-mat/0612659

Date: Thu, 28 Dec 2006 07:23:15 GMT (65kb)

Title: Super-shell structure in harmonically trapped fermionic gases and its

semi-classical interpretation

Authors: M. Ogren, Y. Yu, S. Aberg, S. M. Reimann, M. Brack

Categories: cond-mat.other

Comments: Final version of procedings for the 'Nilsson conference'

Subj-class: Other

Journal-ref: Phys. Scr. T125 (2006) 37-40

\\

It was recently shown in self-consistent Hartree-Fock calculations that a

harmonically trapped dilute gas of fermionic atoms with a repulsive two-body

interaction exhibits a pronounced {\it super-shell} structure: the shell

fillings due to the spherical harmonic trapping potential are modulated by a

beat mode. This changes the ``magic numbers'' occurring between the beat nodes

by half a period. The length and amplitude of the beating mode depends on the

strength of the interaction. We give a qualitative interpretation of the beat

structure in terms of a semiclassical trace formula that uniformly describes

the symmetry breaking U(3) $\to$ SO(3) in a 3D harmonic oscillator potential

perturbed by an anharmonic term $\propto r^4$ with arbitrary strength. We show

that at low Fermi energies (or particle numbers), the beating gross-shell

structure of this system is dominated solely by the two-fold degenerate

circular and (diametrically) pendulating orbits.

\\ ( http://arXiv.org/abs/cond-mat/0612659 , 65kb)

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\\

Paper: cond-mat/0612664

Date: Thu, 28 Dec 2006 18:22:12 GMT (70kb)

Title: Vortex quantum creation and winding number scaling in a quenched spinor

Bose gas

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

Categories: cond-mat.other

Comments: 4 pages of RevTex4, 2 figures

Subj-class: Other

\\

Motivated by a recent experiment, we study non-equilibrium quantum phenomena

taking place in the quench of a spinor Bose-Einstein condensate through the

zero-temperature phase transition separating the paramagnetic and ferromagnetic

phases. We derive the typical spin domain structure (correlations of the

effective magnetization) created by the quench arising due to spin-mode

fluctuations, and establish a sample-size scaling law for the creation of spin

vortices, which are topological defects in the transverse magnetization.

\\ ( http://arXiv.org/abs/cond-mat/0612664 , 70kb)

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\\

Paper: cond-mat/0612670

Date: Thu, 28 Dec 2006 19:42:23 GMT (28kb)

Title: Anderson Localization of Expanding Bose-Einstein Condensates in Random

Potentials

Authors: Laurent Sanchez-Palencia (LCFIO), David Cl\'{e}ment (LCFIO), Pierre

Lugan (LCFIO), Philippe Bouyer (LCFIO), Georgy V. Shlyapnikov (LPTMS), Alain

Aspect (LCFIO)

Categories: cond-mat.other

Comments: 4 pages, 2 figures

Proxy: ccsd hal-00122278

Subj-class: Other

\\

We show that the expansion of an initially confined interacting 1D

Bose-Einstein condensate can exhibit Anderson localization in a weak random

potential. For speckle potentials used in quantum gases, the Fourier transform

of the correlation function has a finite support and in 1D there is a mobility

edge $\k_m=1/\sigma_R$, where $\sigma_R$ is the correlation length of the

disorder. Then, for the initial healing length of the expanding condensate

$\xi_{ini}>\sigma_R$ the localization is exponential, and for

$\xi_{ini}<\sigma_R$ it changes to algebraic.

\\ ( http://arXiv.org/abs/cond-mat/0612670 , 28kb)

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\\

Paper (*cross-listing*): gr-qc/0407075

Date: Tue, 20 Jul 2004 00:31:46 GMT (16kb)

Title: Gravitational Vacuum Condensate Stars

Authors: Pawel O. Mazur, Emil Mottola (University of South Carolina, Los Alamos

National Laboratory)

Categories: gr-qc hep-ph hep-th quant-ph

Comments: 17 pages, LaTeX file

Journal-ref: Proc. Nat. Acad. Sci. 101 (2004) 9545-9550

DOI: 10.1073/pnas.0402717101

\\

A new final state of gravitational collapse is proposed. By extending the

concept of Bose-Einstein condensation to gravitational systems, a cold, dark,

compact object with an interior de Sitter condensate $p_{_V} = -\rho_{_V}$ and

an exterior Schwarzschild geometry of arbitrary total mass $M$ is constructed.

These are separated by a shell with a small but finite proper thickness $\ell$

of fluid with equation of state $p=+\rho$, replacing both the Schwarzschild and

de Sitter classical horizons. The new solution has no singularities, no event

horizons, and a global time. Its entropy is maximized under small fluctuations

and is given by the standard hydrodynamic entropy of the thin shell, which is

of order $k_{_B}\ell Mc/\hbar$, instead of the Bekenstein-Hawking entropy

formula, $S_{_{BH}}= 4\pi k_{_B} G M^2/\hbar c$. Hence unlike black holes, the

new solution is thermodynamically stable and has no information paradox.

\\ ( http://arXiv.org/abs/gr-qc/0407075 , 16kb)

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The replacements:

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\\

Paper: quant-ph/0610029

replaced with revised version Thu, 14 Dec 2006 22:55:23 GMT (881kb)

Title: Cavity QED determination of atomic number statistics in optical lattices

Authors: W. Chen, D. Meiser, and P. Meystre

Categories: quant-ph cond-mat.other physics.atom-ph

Comments: 10 pages revtex, 13 figures

Subj-class: Quantum Physics; Other; Atomic Physics

\\ ( http://arXiv.org/abs/quant-ph/0610029 , 881kb)

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\\

Paper: physics/0608021

replaced with revised version Fri, 15 Dec 2006 15:36:01 GMT (231kb)

Title: From Optical Lattice Clocks to the Measurement of Forces in the Casimir

Regime

Authors: Peter Wolf (SYRTE, BIPM), Pierre Lemonde (SYRTE), Astrid Lambrecht

(LKB - Jussieu), Sebastien Bize (SYRTE), Arnaud Landragin (SYRTE), Andre

Clairon (SYRTE)

Categories: physics.atom-ph

Comments: revised and extended version

Proxy: ccsd ccsd-00088469

Subj-class: Atomic Physics

\\ ( http://arXiv.org/abs/physics/0608021 , 231kb)

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\\

Paper: cond-mat/0606706

replaced with revised version Mon, 18 Dec 2006 20:19:21 GMT (229kb)

Title: Superfluidity and excitations at unitarity

Authors: Dean Lee (North Carolina State University)

Categories: cond-mat.stat-mech cond-mat.supr-con

Comments: 40 pages, 19 figures, revised version includes new data on

two-particle density correlations

Subj-class: Statistical Mechanics; Superconductivity

\\ ( http://arXiv.org/abs/cond-mat/0606706 , 229kb)

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\\

Paper: cond-mat/0609390

replaced with revised version Sun, 17 Dec 2006 18:13:10 GMT (85kb)

Title: Precision Measurements of Collective Oscillations in the BEC-BCS

Crossover

Authors: A. Altmeyer, S. Riedl, C. Kohstall, M. Wright, R. Geursen, M.

Bartenstein, C. Chin, J. Hecker Denschlag, R. Grimm

Categories: cond-mat.other cond-mat.supr-con

Comments: improved discussion of small ellipticity and anharmonicity

corrections

Subj-class: Other; Superconductivity

\\ ( http://arXiv.org/abs/cond-mat/0609390 , 85kb)

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\\

Paper: quant-ph/0512149

replaced with revised version Mon, 18 Dec 2006 03:57:15 GMT (18kb)

Title: Quantum state transfer from light to molecules via coherent two-color

photo-association in an atomic Bose-Einstein condensate

Authors: Hui Jing and Ming-Sheng Zhan

Comments: 1 figure, accepted by Eur.Phys.J.D on Dec.15,2006

\\ ( http://arXiv.org/abs/quant-ph/0512149 , 18kb)

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\\

Paper: cond-mat/0608656

replaced with revised version Wed, 20 Dec 2006 01:55:38 GMT (306kb)

Title: Dynamical vortex phases in a Bose-Einstein condensate driven by a

rotating optical lattice

Authors: Kenichi Kasamatsu, Makoto Tsubota

Categories: cond-mat.other

Comments: 4 pages, 3 figures

Subj-class: Other

Journal-ref: Phys. Rev. Lett. 97, 240404 (2006)

\\ ( http://arXiv.org/abs/cond-mat/0608656 , 306kb)

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\\

Paper: cond-mat/0603273

replaced with revised version Thu, 21 Dec 2006 18:38:39 GMT (581kb)

Title: Ultracold atomic Bose and Fermi spinor gases in optical lattices

Authors: K. Eckert, L. Zawitkowski, M.J. Leskinen, A. Sanpera, M.Lewenstein

Categories: cond-mat.other

Comments: 15 pages, 5 figures; a completely new and substantially expanded

version with several errors corrected

Subj-class: Other

\\ ( http://arXiv.org/abs/cond-mat/0603273 , 581kb)

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\\

Paper: quant-ph/0610033

replaced with revised version Thu, 21 Dec 2006 12:57:23 GMT (8kb)

Title: Macroscopic realism, wave-particle duality and the superposition

principle

Authors: N. L. Chuprikov

Comments: Latex, 8 pages; the article is thoroughly rewritten

\\ ( http://arXiv.org/abs/quant-ph/0610033 , 8kb)

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\\

Paper: cond-mat/0606322

replaced with revised version Sat, 23 Dec 2006 06:42:52 GMT (750kb)

Title: Finite Temperature Phase Diagram of a Two-Component Fermi Gas with

Density Imbalance

Authors: Lianyi He, Meng Jin and Pengfei Zhuang

Categories: cond-mat.supr-con cond-mat.other cond-mat.stat-mech physics.atom-ph

Comments: Final published version

Subj-class: Superconductivity; Other; Statistical Mechanics; Atomic Physics

Journal-ref: Phys. Rev. B 74, 214516 (2006)

DOI: 10.1103/PhysRevB.74.214516

\\ ( http://arXiv.org/abs/cond-mat/0606322 , 750kb)

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\\

Paper: cond-mat/0608472

replaced with revised version Sun, 24 Dec 2006 09:47:33 GMT (23kb)

Title: Conserving Gapless Mean-Field Theory of a Multi-Component Bose-Einstein

Condensate

Authors: Yoshiyuki Kondo, Takafumi Kita

Categories: cond-mat.stat-mech

Comments: 8 pages, 7 figures

Subj-class: Statistical Mechanics

\\ ( http://arXiv.org/abs/cond-mat/0608472 , 23kb)

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\\

Paper: physics/0612182

replaced with revised version Fri, 22 Dec 2006 11:16:03 GMT (239kb)

Title: Dimension of holes and high-temperature condensate in Bose--Einstein

statistics

Authors: V. P. Maslov

Categories: physics.gen-ph

Comments: 14 pages, 3 figures; minor correction on p.11

Subj-class: General Physics

\\ ( http://arXiv.org/abs/physics/0612182 , 239kb)

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\\

Paper: cond-mat/0607405

replaced with revised version Thu, 28 Dec 2006 20:54:51 GMT (513kb)

Title: Density fingerprint of giant vortices in Fermi gases near a Feshbach

resonance

Authors: Hui Hu and Xia-Ji Liu

Categories: cond-mat.supr-con cond-mat.str-el

Comments: 4 pages and 5 figures, fig. 5 is changed. Editorially approved for

publication in Physical Review A (as a Rapid Communication)

Subj-class: Superconductivity; Strongly Correlated Electrons

\\ ( http://arXiv.org/abs/cond-mat/0607405 , 513kb)

------------------------------------------------------------------------------

-- ========================================================================= 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 Tue Jan 02 2007 - 16:12:24 EST

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