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

Date: Tue, 30 Oct 2007 22:09:26 +1000 (EST)

Date: Tue, 30 Oct 2007 22:09:26 +1000 (EST)

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

Hi all,

In a slightly unusual occurence, this week there is one less preprint (24) and

two fewer replacements (12) than last week. Feynman would fail to be impressed,

and now that I see it written in front of me, so am I.

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arXiv:0710.1090

Date: Thu, 4 Oct 2007 20:11:22 GMT (824kb)

Title: Vortex lattices of bosons in deep rotating lattices

Authors: Dan Goldbaum, Erich Mueller

Categories: cond-mat.other

Comments: 13 Pages, 5 Figures

\\

We study vortex-lattice phases for a Bose gas trapped in a rotating optical

lattice near the Mott-Hubbard transition. We find a series of transitions where

vortices are pinned with their cores on plaquettes/sites. We discuss

connections between these vortex structures and the Hofstadter butterfly

spectrum of free particles on a rotating lattice.

\\ ( http://arxiv.org/abs/0710.1090 , 824kb)

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arXiv:0710.1179

Date: Fri, 5 Oct 2007 10:38:01 GMT (60kb)

Title: Dark matter-wave solitons in the dimensionality crossover

Authors: G. Theocharis, P.G. Kevrekidis, M.K. Oberthaler and D.J. Frantzeskakis

Categories: cond-mat.other

Comments: Phys. Rev. A, in press

\\

We consider the statics and dynamics of dark matter-wave solitons in the

dimensionality crossover regime from 3D to 1D. There, using the nonpolynomial

Schr\"{o}dinger mean-field model, we find that the anomalous mode of the

Bogoliubov spectrum has an eigenfrequency which coincides with the soliton

oscillation frequency obtained by the 3D Gross-Pitaevskii model. We show that

substantial deviations (of order of 10% or more) from the characteristic

frequency $\omega_{z}/\sqrt{2}$ ($\omega_{z}$ being the longitudinal trap

frequency) are possible even in the purely 1D regime.

\\ ( http://arxiv.org/abs/0710.1179 , 60kb)

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arXiv:0710.1213

Date: Fri, 5 Oct 2007 12:52:24 GMT (117kb)

Title: Exploiting soliton decay and phase fluctuations in atom chip

interferometry of Bose-Einstein condensates

Authors: R.G. Scott, T.E. Judd, T.M. Fromhold

Categories: cond-mat.other

Comments: 5 pages, 5 figures

\\

We show that the decay of a soliton into vortices provides a mechanism for

measuring the initial phase difference between two merging Bose-Einstein

condensates. At very low temperatures, the mechanism is resonant, operating

only when the clouds start in anti-phase. But at higher temperatures, phase

fluctuations trigger vortex production over a wide range of initial relative

phase, as observed in recent experiments at MIT. Choosing the merge time to

maximize the number of vortices created makes the interferometer highly

sensitive to spatially varying phase patterns and hence atomic movement.

\\ ( http://arxiv.org/abs/0710.1213 , 117kb)

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arXiv:0710.1236

Date: Fri, 5 Oct 2007 14:24:09 GMT (59kb)

Title: Detection of Spin Correlations in Optical Lattices by Light Scattering

Authors: Ines de Vega, J. Ignacio Cirac, D. Porras

Categories: quant-ph

\\

We show that spin correlations of atoms in an optical lattice can be

reconstructed by coupling the system to the light, and by measuring

correlations between the emitted photons. This principle is the basis for a

method to characterize states in quantum computation and simulation with

optical lattices. As examples, we study the detection of spin correlations in a

quantum magnetic phase, and the characterization of cluster states.

\\ ( http://arxiv.org/abs/0710.1236 , 59kb)

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arXiv:0710.1245

Date: Fri, 5 Oct 2007 14:57:17 GMT (315kb)

Title: Spectroscopy of strontium Rydberg states using electromagnetically

induced transparency

Authors: S. Mauger, J. Millen and M. P. A. Jones

Categories: quant-ph

Comments: 8 pages, 4 figures

\\

We report on the all-optical detection of Rydberg states in a effusive atomic

beam of strontium atoms using electromagnetically induced transparency (EIT).

Using narrow-linewidth CW lasers we obtain an EIT linewidth of 5 MHz. To

illustrate the high spectroscopic resolution offered by this method, we have

measured isotope shifts of the 5s18d ^1D_2 and 5s19s ^1S_0 Rydberg states. This

technique could be applied to high-resolution, non-destructive measurements of

ultra-cold Rydberg gases and plasmas.

\\ ( http://arxiv.org/abs/0710.1245 , 315kb)

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arXiv:0710.1353

Date: Sat, 6 Oct 2007 09:37:26 GMT (27kb)

Title: Exact Numerical Study of Pair Formation with Imbalanced Fermion

Populations

Authors: G. G. Batrouni, M. H. Huntley, V. G. Rousseau and R. T. Scalettar

Categories: cond-mat.str-el

\\

We present an exact Quantum Monte Carlo study of the attractive 1-dimensional

Hubbard model with imbalanced fermion population. The pair-pair correlation

function, which decays monotonically in the absence of polarization P, develops

oscillations when P is nonzero, characteristic of

Fulde-Ferrell-Larkin-Ovchinnikov phase. The pair momentum distribution peaks at

a momentum equal to the difference in the Fermi momenta. At strong coupling,

the minority and majority momentum distributions are shown to be deformed,

reflecting the presence of the other species, and its Fermi surface. The FFLO

oscillations survive the presence of a confining potential, and the local

polarization at the trap center exhibits a marked dip, similar to that observed

experimentally.

\\ ( http://arxiv.org/abs/0710.1353 , 27kb)

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arXiv:0710.1356

Date: Sat, 6 Oct 2007 10:58:32 GMT (104kb)

Title: Quantum Monte Carlo Study of a Dynamic Hubbard Model

Authors: K. Bouadim, M. Enjalran, F. Hebert, G.G. Batrouni, and R.T. Scalettar

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

\\

The `dynamic' Hubbard Hamiltonian describes interacting fermions on a lattice

whose on-site repulsion is modulated by a coupling to a fluctuating bosonic

field. We investigate one such model, introduced by Hirsch, using the

determinant Quantum Monte Carlo method. Our key result is that the extended

s-wave pairing vertex, repulsive in the usual static Hubbard model, becomes

attractive as the coupling to the fluctuating Bose field increases. The sign

problem prevents us from exploring a low enough temperature to see if a

superconducting transition occurs. We also observe a stabilization of

antiferromagnetic correlations and the Mott gap near half-filling, and a near

linear behavior of the energy as a function of particle density which indicates

a tendency toward phase separation.

\\ ( http://arxiv.org/abs/0710.1356 , 104kb)

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arXiv:0710.1376

Date: Sat, 6 Oct 2007 16:45:58 GMT (357kb)

Title: Emergent Symmetry and Dimensional Reduction at a Quantum Critical Point

Authors: J. Schmalian and C. D. Batista

Categories: cond-mat.str-el

\\

We show that the spatial dimensionality of the quantum critical point

associated with Bose--Einstein condensation at T=0 is reduced when the

underlying lattice comprises a set of layers coupled by a frustrating

interaction. For this purpose, we use an heuristic mean field approach that is

complemented and justified by a more rigorous renormalization group analysis.

Due to the presence of an emergent symmetry, i.e. a symmetry of the ground

state that is absent in the underlying Hamiltonian, a three--dimensional

interacting Bose system undergoes a chemical potential tuned quantum phase

transition that is strictly two dimensional. Our theoretical predictions for

the critical temperature as a function of the chemical potential correspond

very well with recent measurements in BaCuSi$_{2}$O$_{6}$.

\\ ( http://arxiv.org/abs/0710.1376 , 357kb)

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arXiv:0710.1549

Date: Mon, 8 Oct 2007 13:34:59 GMT (48kb)

Title: Phase separation in a polarized Fermi gas at zero temperature

Authors: S. Pilati and S. Giorgini (Dipartimento di Fisica, Universit\`a di

Trento and CNR-INFM BEC Center, Povo, Trento, Italy)

Categories: cond-mat.other

Comments: 5 pages, 4 figures

\\

We investigate the phase diagram of asymmetric two-component Fermi gases at

zero temperature as a function of polarization and interaction strength. The

equations of state of the uniform superfluid and normal phase are determined

using quantum Monte Carlo simulations. We find three different mixed states,

where the superfluid and the normal phase coexist in equilibrium, corresponding

to phase separation between: (a) the polarized superfluid and the fully

polarized normal gas, (b) the polarized superfluid and the partially polarized

normal gas and (c) the unpolarized superfluid and the partially polarized

normal gas.

\\ ( http://arxiv.org/abs/0710.1549 , 48kb)

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arXiv:0710.1575

Date: Mon, 8 Oct 2007 15:30:12 GMT (654kb)

Title: Full distribution functions of quantum noise in an interacting many-body

system

Authors: S. Hofferberth, I. Lesanovsky, T. Schumm, J. Schmiedmayer, A.

Imambekov, V. Gritsev, E. Demler

Categories: cond-mat.other

\\

The probabilistic nature of measurements and the resulting intrinsic quantum

noise in observables is one of the fundamental aspects of quantum mechanics

[1]. It is well studied on the single-particle level and for non-interacting

systems [2] but much less understood for interacting many-body systems, where

quantum noise can reveal the non-local correlations and entanglement of the

underlying many-body states [3]. Here, we present the first measurement of the

full distribution functions of quantum noise in an interacting many-body

system. The shot-to-shot statistical properties of interference experiments,

performed with pairs of independent one-dimensional atomic condensates, can be

directly related to the full distribution functions of noise in the system [4].

Probing different system sizes we observe the crossover from quantum noise to

thermal noise, reflected in a characteristic change in the distribution

functions from Gumbel-type to Poissonian, in excellent agreement with

predictions based on the Luttinger liquid formalism [5-7]. Our results

demonstrate the power of quantum noise analysis as a probe of strongly

correlated systems, and the power of simple ultracold atom systems to

illustrate and 'quantum simulate' fundamental quantum processes relevant in

many areas of physics.

\\ ( http://arxiv.org/abs/0710.1575 , 654kb)

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arXiv:0710.0895 (*cross-listing*)

Date: Wed, 3 Oct 2007 22:10:43 GMT (177kb)

Title: Revealing anyonic statistics with multiphoton entanglement

Authors: J. K. Pachos, W. Wieczorek, C. Schmid, N. Kiesel, R. Pohlner, H.

Weinfurter

Categories: quant-ph cond-mat.mes-hall hep-th physics.optics

Comments: 14 pages, 4 figures

\\

The collective statistical behaviour of quantum particles is, according to

Pauli, determined by their spin. In three spatial dimensions, there are only

two possible types of statistics, dividing particles into two groups: bosons

and fermions. However, if one is restricted to two-dimensional systems the

situation changes drastically. There, anyons can appear, which exhibit

fractional statistics ranging continuously from bosonic to fermionic behaviour.

This is manifested by the observation that their quantum state can acquire

"any" phase when one anyon is exchanged with another one, in contrast to the

restricted values +1 for bosons and -1 for fermions. Anyons are responsible for

the fractional quantum Hall effect and should be realized as quasiparticles in

highly entangled many-body systems. The isolation of anyons in these systems

requires cooling to very low temperatures where only the ground and a few

excited states are populated. However, the continuing presence of interactions

makes anyons quite elusive and, despite substantial experimental effort, their

definitive detection remains open. Here, as an alternative approach, we encode

the relevant many-body state of an anyonic model in the multi-partite entangled

state of polarized photons. This quantum system is intrinsically stable against

decoherence. It enables easy manipulation and detection of abelian anyons,

allows for the demonstration of their fusion rules and facilitates the

unambiguous determination of their statistical properties. The experiments

directly demonstrate the presence of fractional statistics in a physical

system.

\\ ( http://arxiv.org/abs/0710.0895 , 177kb)

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arXiv:0710.1339

Date: Sat, 6 Oct 2007 03:19:08 GMT (168kb)

Title: Resonant ratcheting of a Bose-Einstein condensate

Authors: Luis Morales-Molina and Sergej Flach

Categories: quant-ph

\\

We study the rectification process of interacting quantum particles in a

periodic potential exposed to the action of an external ac driving. The

breaking of spatio-temporal symmetries leads to directed motion already in the

absence of interactions. A hallmark of quantum ratcheting is the appearance of

resonant enhancement of the current (Europhys. Lett. 79 (2007) 10007 and Phys.

Rev. A 75 (2007) 063424). Here we study the fate of these resonances within a

Gross-Pitaevskii equation which describes a mean field interaction between many

particles. We find, that the resonance is i) not destroyed by interactions, ii)

shifting its location with increasing interaction strength. We trace the

Floquet states of the linear equations into the nonlinear domain, and show that

the resonance gives rise to an instability and thus to the appearance of new

nonlinear Floquet states, whose transport properties differ strongly as

compared to the case of noninteracting particles.

\\ ( http://arxiv.org/abs/0710.1339 , 168kb)

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arXiv:0710.1702

Date: Tue, 9 Oct 2007 09:16:32 GMT (961kb)

Title: Formation of solitons in atomic Bose-Einstein condensates by dark-state

adiabatic passage

Authors: G. Juzeliunas, J. Ruseckas, P. \"Ohberg, M. Fleischhauer

Categories: cond-mat.soft

Comments: 10 figures

Journal-ref: Lithuanian. J. Phys. 47 (3), 351-360 (2007)

\\

We propose a new method of creating solitons in elongated Bose-Einstein

Condensates (BECs) by sweeping three laser beams through the BEC. If one of the

beams is in the first order (TEM10) Hermite-Gaussian mode, its amplitude has a

transversal phase slip which can be transferred to the atoms creating a

soliton. Using this method it is possible to circumvent the restriction set by

the diffraction limit inherent to conventional methods such as phase

imprinting. The method allows one to create multicomponent (vector) solitons of

the dark-bright form as well as the dark-dark combination. In addition it is

possible to create in a controllable way two or more dark solitons with very

small velocity and close to each other for studying their collisional

properties.

\\ ( http://arxiv.org/abs/0710.1702 , 961kb)

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arXiv:0710.1712

Date: Tue, 9 Oct 2007 10:11:41 GMT (182kb)

Title: Quench dynamics and defect production in the Kitaev model

Authors: K. Sengupta, Diptiman Sen, Shreyoshi Mondal

Categories: cond-mat.stat-mech cond-mat.str-el

Comments: 5 pages including 4 figures

\\

We study quench dynamics and defect production in the Kitaev model where the

quench takes the system across a critical line. We point out that in such a

situation, for a slow quench rate 1/\tau, the defect density n \sim

1/\sqrt{\tau} in contrast to the 1/\tau behavior expected for quench through a

critical point. We show, by an exact computation of some multi-spin correlation

functions, that the defects thus generated are spatially anisotropic. We

discuss the variation of the shape and size of the defects with both the rate

of quench and the model parameters.

\\ ( http://arxiv.org/abs/0710.1712 , 182kb)

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arXiv:0710.1801

Date: Tue, 9 Oct 2007 15:27:12 GMT (661kb)

Title: Absence of fermionic quasi-particles in the BEC regime of the attractive

Fermi gas

Authors: Nils Lerch, Lorenz Bartosch, and Peter Kopietz

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

Comments: 4 RevTex pages, 3 figures

\\

We calculate the effect of order parameter fluctuations on the fermionic

single-particle excitations of the attractive Fermi gas in the BEC regime where

the binding energy of the s-wave bound state is the largest energy scale. We

show that in dimensions D <= 3 the singular interaction between the fermions

mediated by the gapless Bogoliubov-Anderson mode prohibits the existence of

well-defined quasi-particles. We explicitly calculate the single-particle

spectral function in D=3 and show that in this case the quasi-particle residue

and the density of states are logarithmically suppressed.

\\ ( http://arxiv.org/abs/0710.1801 , 661kb)

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arXiv:0710.1801

Date: Tue, 9 Oct 2007 15:27:12 GMT (661kb)

Title: Absence of fermionic quasi-particles in the BEC regime of the attractive

Fermi gas

Authors: Nils Lerch, Lorenz Bartosch, and Peter Kopietz

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

Comments: 4 RevTex pages, 3 figures

\\

We calculate the effect of order parameter fluctuations on the fermionic

single-particle excitations of the attractive Fermi gas in the BEC regime where

the binding energy of the s-wave bound state is the largest energy scale. We

show that in dimensions D <= 3 the singular interaction between the fermions

mediated by the gapless Bogoliubov-Anderson mode prohibits the existence of

well-defined quasi-particles. We explicitly calculate the single-particle

spectral function in D=3 and show that in this case the quasi-particle residue

and the density of states are logarithmically suppressed.

\\ ( http://arxiv.org/abs/0710.1801 , 661kb)

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arXiv:0710.1848

Date: Tue, 9 Oct 2007 18:40:20 GMT (10kb,D)

Title: Long wavelength spin dynamics of ferromagnetic condensates

Authors: Austen Lamacraft

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

\\

We obtain the equations of motion for a ferromagnetic Bose condensate of

arbitrary spin in the long wavelength limit. We find that the magnetization of

the condensate is described by a non-trivial modification of the

Landau-Lifshitz equation, in which the magnetization is advected by the

superfluid velocity. This hydrodynamic description, valid when the condensate

wavefunction varies on scales much longer than either the density or spin

healing lengths, is both physically more transparent and computationally

simpler than the corresponding time-dependent Gross-Pitaevskii equation. We

discuss the conservation laws of the theory and its application to the analysis

of the stability of magnetic helices and Larmor precession. Precessional

instabilities in particular provide a novel physical signature of dipolar

forces.

\\ ( http://arxiv.org/abs/0710.1848 , 10kb)

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arXiv:0710.1853

Date: Tue, 9 Oct 2007 18:42:18 GMT (37kb)

Title: Engineering many-body quantum dynamics by disorder

Authors: Pierfrancesco Buonsante and Sandro Wimberger

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

Comments: 11 pages, 4 figures

\\

Going beyond the currently investigated regimes in experiments on quantum

transport of ultracold atoms in disordered potentials, we predict a crossover

between regular and quantum-chaotic dynamics when varying the strength of

disorder. Our spectral approach is based on the Bose-Hubbard model describing

interacting atoms in deep random potentials. The predicted crossover from

localized to diffusive dynamics depends on the simultaneous presence of

interactions and disorder, and can be verified in the laboratory by monitoring

the evolution of typical experimental initial states.

\\ ( http://arxiv.org/abs/0710.1853 , 37kb)

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rXiv:0710.1737

Date: Tue, 9 Oct 2007 15:11:39 GMT (68kb)

Title: A number filter for matter-waves

Authors: G. Nandi, A. Sizmann, J. Fort\'agh, R. Walser

Categories: quant-ph

Comments: 7 pages Latex, 5 eps color figures

\\

In current Bose-Einstein condensate experiments, the shot-to-shot variation

of atom number fluctuates up to 10%. In here, we present a procedure to

suppress such fluctuations by using a nonlinear p-pi-pbar matter wave

interferometer for a Bose-Einstein condensate with two internal states and a

high beam-splitter asymmetry (p, pbar not-equal 0.5). We analyze the situation

for an inhomogeneous trap within the Gross-Pitaevskii mean-field theory, as

well as a quantum mechanical Josephson model, which addresses complementary

aspects of the problem and agrees well otherwise.

\\ ( http://arxiv.org/abs/0710.1737 , 68kb)

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arXiv:0710.1938

Date: Wed, 10 Oct 2007 06:59:08 GMT (537kb)

Title: Stripe Formation in Fermionic Atoms on 2-D Optical Lattice inside a Box

Trap: DMRG Studies for Repulsive Hubbard Model with Open Boundary Condition

Authors: M. Machida, M. Okumura, S. Yamada

Categories: cond-mat.str-el

\\

We suggest that box shape trap enables to observe intrinsic properties of the

repulsive Hubbard model in a fixed doping in contrast to the harmonic trap

bringing about spatial variations of atom density profiles. In order to predict

atomic density profile under the box trap, we apply the directly-extended

density-matrix renormalization group method to 4-leg repulsive Hubbard model

with the open boundary condition. Consequently, we find that stripe formation

is universal in a low hole doping range and the stripe sensitively changes its

structure with variations of $U/t$ and the doping rate. A remarkable change is

that a stripe formed by a hole pair turns to one by a bi-hole pair when

entering a limited strong $U/t$ range. Furthermore, a systematic calculation

reveals that the Hubbard model shows a change from the stripe to the Friedel

like oscillation with increasing the doping rate.

\\ ( http://arxiv.org/abs/0710.1938 , 537kb)

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arXiv:0710.1984

Date: Wed, 10 Oct 2007 12:14:47 GMT (674kb)

Title: Density Modulations in an Elongated BEC Released from a Disordered

Potential

Authors: David Cl\'ement (LCFIO), Philippe Bouyer (LCFIO), Alain Aspect

(LCFIO), Laurent Sanchez-Palencia (LCFIO)

Categories: cond-mat.other

Proxy: ccsd hal-00178074

\\

We observe large density modulations in time-of-flight images of elongated

Bose-Einstein condensates, initially confined in a harmonic trap and in the

presence of weak disorder. The development of these modulations during the

time-of-flight and their dependence with the disorder are investigated. We

render an account of this effect using numerical and analytical calculations.

Our analysis shows how the observed large modulations originate from the weak

initial density modulations induced by the disorder, and do not require phase

fluctuations (thermal or quantum) in the initial condensate.

\\ ( http://arxiv.org/abs/0710.1984 , 674kb)

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arXiv:0710.2178

Date: Thu, 11 Oct 2007 07:49:17 GMT (421kb)

Title: Zel'dovich-Starobinsky Effect in Atomic Bose-Einstein Condensates:

Analogy to Kerr Black Hole

Authors: Hiromitsu Takeuchi, Makoto Tsubota and Grigory E. Volovik

Categories: cond-mat.other

Comments: 6 pages, 3 figures,submitted to JLTP

\\

We consider circular motion of a heavy object in an atomic Bose-Einstein

condensate (BEC) at $T=0{\rm K}$. Even if the linear velocity of the object is

smaller than the Landau critical velocity, the object may radiate

quasiparticles and thus experience the quantum friction. The radiation process

is similar to Zel'dovich-Starobinskii (ZS) effect -- the radiation by a

rotating black hole. This analogy emerges when one introduces the effective

acoustic metric for quasiparticles. In the rotating frame this metric has an

ergosurface, which is similar to the ergosurface in the metric of a rotating

black hole. In a finite size BEC, the quasiparticle creation takes place when

the ergosurface is within the condensate and occurs via quantum tunneling from

the object into the ergoregion. The dependence of the radiation rate on the

position of the ergosurface is investigated.

\\ ( http://arxiv.org/abs/0710.2178 , 421kb)

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arXiv:0710.2220

Date: Thu, 11 Oct 2007 11:46:24 GMT (69kb)

Title: Quantum phase of mixtures of atoms and molecules on optical lattices

Authors: V.G. Rousseau and P.J.H. Denteneer

Categories: cond-mat.stat-mech

Comments: 7 pages, 10 figures

\\

We investigate the phase diagram of a two-species Bose-Hubbard model

including a conversion term, by which two particles from the first species can

be converted into one particle of the second species, and vice-versa. The model

can be related to ultra-cold atom experiments in which a Feshbach resonance

produces long-lived bound states viewed as diatomic molecules. The model is

solved exactly by means of Quantum Monte Carlo simulations. We show than an

"inversion of population" occurs, depending on the parameters, where the second

species becomes more numerous than the first species. The model also exhibits

an exotic incompressible "Super-Mott" phase where the particles from both

species can flow with signs of superfluidity, but without global supercurrent.

We present two phase diagrams, one in the (chemical potential, conversion)

plane, the other in the (chemical potential, detuning) plane.

\\ ( http://arxiv.org/abs/0710.2220 , 69kb)

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arXiv:0710.2116

Date: Wed, 10 Oct 2007 21:07:30 GMT (108kb)

Title: Atom detection and photon production in a scalable, open, optical

microcavity

Authors: M. Trupke, J. Goldwin, B. Darqui\'e, G. Dutier, S. Eriksson, J.

Ashmore, E. A. Hinds

Categories: quant-ph

Comments: 4 pages, 4 figures. A typographical error in the published paper has

been corrected (equation of the corrected normalized variance, page 3, 2nd

paragraph)

Journal-ref: Phys. Rev. Lett. 99, 063601 (2007)

\\

A microfabricated Fabry-Perot optical resonator has been used for atom

detection and photon production with less than 1 atom on average in the cavity

mode. Our cavity design combines the intrinsic scalability of microfabrication

processes with direct coupling of the cavity field to single-mode optical

waveguides or fibers. The presence of the atom is seen through changes in both

the intensity and the noise characteristics of probe light reflected from the

cavity input mirror. An excitation laser passing transversely through the

cavity triggers photon emission into the cavity mode and hence into the

single-mode fiber. These are first steps towards building an optical

microcavity network on an atom chip for applications in quantum information

processing.

\\ ( http://arxiv.org/abs/0710.2116 , 108kb)

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The replacements:

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arXiv:0707.4066

replaced with revised version Fri, 5 Oct 2007 07:12:26 GMT (707kb)

Title: Fulde-Ferrell-Larkin-Ovchinnikov states in one-dimensional

spin-polarized ultracold atomic Fermi gases

Authors: Xia-Ji Liu, Hui Hu, and Peter D. Drummond

Categories: cond-mat.stat-mech cond-mat.str-el

Comments: 22 papes, 19 figures

Journal-ref: Phys. Rev. A 76, 043605 (2007)

DOI: 10.1103/PhysRevA.76.043605

\\ ( http://arxiv.org/abs/0707.4066 , 707kb)

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arXiv:0704.3868

replaced with revised version Sat, 6 Oct 2007 10:04:44 GMT (20kb)

Title: Bose-Einstein condensation of strongly interacting dipolar gases

Authors: Daw-Wei Wang

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

Comments: Extended verion (8 pages, 1 figure)

\\ ( http://arxiv.org/abs/0704.3868 , 20kb)

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arXiv:0707.4422

replaced with revised version Mon, 8 Oct 2007 19:17:16 GMT (63kb)

Title: Specific heat of a one-dimensional interacting Fermi system: the role of

anomalies

Authors: Andrey V. Chubukov, Dmitrii L. Maslov, and Ronojoy Saha

Categories: cond-mat.str-el cond-mat.mes-hall

Comments: 20 pages, 7 figures; discussion of the two-cutoff model is modified;

a new figure is added

\\ ( http://arxiv.org/abs/0707.4422 , 63kb)

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arXiv:0704.1413

replaced with revised version Tue, 9 Oct 2007 19:15:43 GMT (163kb)

Title: Preparation and detection of magnetic quantum phases in optical

superlattices

Authors: A. M. Rey, V. Gritsev, I. Bloch, E. Demler and M.D. Lukin

Categories: cond-mat.other

Comments: 5 pages, 2 Figures, reference added

Journal-ref: Phys. Rev . Lett 99, 140601 (2007)

\\ ( http://arxiv.org/abs/0704.1413 , 163kb)

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arXiv:0705.4647 (*cross-listing*)

replaced with revised version Tue, 9 Oct 2007 16:06:06 GMT (88kb)

Title: Bell's inequality and universal quantum gates in a cold atom chiral

fermionic p-wave superfluid

Authors: Chuanwei Zhang, Sumanta Tewari, S. Das Sarma

Categories: quant-ph cond-mat.str-el

Comments: 4+ pages, 3 figures, minor corrections, accepted for publication in

PRL

\\ ( http://arxiv.org/abs/0705.4647 , 88kb)

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arXiv:0709.0754

replaced with revised version Sun, 7 Oct 2007 07:06:00 GMT (910kb)

Title: Coherent Control of Trapped Bosons

Authors: Analabha Roy, Linda E. Reichl

Categories: physics.atom-ph

Comments: 17 figures, Figs 15 and 16 modified in version 4 to correct for a

small numerical error observed in version 3

\\ ( http://arxiv.org/abs/0709.0754 , 910kb)

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arXiv:0705.3361

replaced with revised version Wed, 10 Oct 2007 12:11:45 GMT (629kb)

Title: Imbalanced Superfluid Phase of a Trapped Fermi Gas in the BCS-BEC

Crossover Regime

Authors: T. Mizushima, M. Ichioka, K. Machida

Categories: cond-mat.supr-con

Comments: 16 pages, 13 figures, replaced by the version to appear in J. Phys.

Soc. Jpn

Journal-ref: J. Phys. Soc. Jpn. 76, 104006 (2007)

\\ ( http://arxiv.org/abs/0705.3361 , 629kb)

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arXiv:cond-mat/0612278

replaced with revised version Thu, 11 Oct 2007 15:42:21 GMT (201kb)

Title: Camparison of the Hanbury Brown-Twiss effect for bosons and fermions

Authors: Tom Jeltes (LASER Center Vrije), John M. McNamara (LASER Center

Vrije), Wim Hogervorst (LASER Center Vrije), Wim Vassen (LASER Center Vrije),

Valentina Krachmalnicoff (LCFIO), Martijn Schellekens (LCFIO), Aur\'elien

Perrin (LCFIO), Hong Chang (LCFIO), Denis Boiron (LCFIO), Alain Aspect

(LCFIO), Christoph I. Westbrook (LCFIO)

Categories: cond-mat.other

Comments: Nature 445, 402 (2007). V2 includes the supplementary information

Proxy: ccsd hal-00119748

Journal-ref: Nature 445 (2007) 402

DOI: 10.1038/nature05513

\\ ( http://arxiv.org/abs/cond-mat/0612278 , 201kb)

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arXiv:0704.0386 (*cross-listing*)

replaced with revised version Thu, 11 Oct 2007 18:55:20 GMT (17kb)

Title: Quantum non-local effects with Bose-Einstein condensates

Authors: Franck Lalo\"e (LKB - Lhomond), William J. Mullin (UMASS)

Categories: quant-ph cond-mat.other

Comments: version published, with a shorter abstract to fit into the 9 lines of

PRL, one more reference, and minor changes

Journal-ref: Physical Review Letters 99 (2007) 150401

\\ ( http://arxiv.org/abs/0704.0386 , 17kb)

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arXiv:0704.3047 (*cross-listing*)

replaced with revised version Thu, 11 Oct 2007 08:28:37 GMT (734kb)

Title: Observation of atom pairs in spontaneous four wave mixing of two

colliding Bose-Einstein Condensates

Authors: A. Perrin (LCFIO), H. Chang (LCFIO), V. Krachmalnicoff (LCFIO), M.

Schellekens (LCFIO), D. Boiron (LCFIO), A. Aspect (LCFIO), C. I. Westbrook

(LCFIO)

Categories: quant-ph cond-mat.other

Comments: additional file reference 31 could be found in source package

Proxy: ccsd hal-00142991

\\ ( http://arxiv.org/abs/0704.3047 , 734kb)

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arXiv:quant-ph/0611078 (*cross-listing*)

Date: Tue, 7 Nov 2006 17:47:43 GMT (88kb)

Date (revised v2): Wed, 21 Mar 2007 19:13:15 GMT (86kb)

Title: Stability and entanglement in optical-atomic amplification of trapped

atoms: the role of atomic collisions

Authors: V. V. Fran\c{c}a and G. A. Prataviera

Categories: quant-ph physics.atom-ph

Comments: 6 pages, 4 figures, accepted by PRA

Journal-ref: Phys. Rev. A 75, 043604 (2007)

\\

Atomic collisions are included in an interacting system of optical fields and

trapped atoms allowing field amplification. We study the effects of collisions

on the system stability. Also a study of the degree of entanglement between

atomic and optical fields is made. We found that, for an atomic field initially

in a vacuum state and optical field in a coherent state, the degree of

entanglement does not depend on the optical field intensity or phase. We show

that in conditions of exponential instability the system presents at long times

two distinct stationary degree of entanglement with collisions affecting only

one of them.

\\ ( http://arxiv.org/abs/quant-ph/0611078 , 86kb)

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arXiv:0707.2359

replaced with revised version Thu, 11 Oct 2007 14:09:27 GMT (280kb)

Title: Manufacturing a thin wire electrostatic trap (TWIST) for ultracold polar

molecules

Authors: J. Kleinert, C. Haimberger, P. J. Zabawa, and N. P. Bigelow

Categories: physics.atom-ph

Comments: 5 pages, 8 figures, updated content

\\ ( http://arxiv.org/abs/0707.2359 , 280kb)

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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 Tue Oct 30 2007 - 22:09:26 EST

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