The following message was sent to the matts_arxiv list by Matthew Davis <mdavis_at_physics.uq.edu.au>
Dear all,
This week there were 25 new preprints and 15 replacements this week:
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arXiv:0805.2512
Date: Fri, 16 May 2008 12:28:20 GMT (73kb)
Title: Interface Tension of Bose-Einstein Condensates
Authors: Bert Van Schaeybroeck
Categories: cond-mat.stat-mech
Comments: 10 pages, 4 figures
\\
Motivated by recent observations of phase-segregated binary Bose-Einstein
condensates, we propose a method to calculate the excess energy due to the
interface tension of a trapped configuration. By this method one should be able
to numerically reproduce the experimental data by means of a simple
Thomas-Fermi approximation, combined with interface excess terms and the
Laplace equation. Using the Gross-Pitaevskii theory, we find expressions for
the interface excesses which are accurate in a very broad range of the
interspecies and intraspecies interaction parameters. We also present
finite-temperature corrections to the interface tension which, aside from the
regime of weak segregation, turn out to be small.
\\ ( http://arxiv.org/abs/0805.2512 , 73kb)
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arXiv:0805.2571
Date: Fri, 16 May 2008 18:05:30 GMT (740kb)
Title: Superfluid Bose gas in two dimensions
Authors: S. Floerchinger and C. Wetterich
Categories: cond-mat.supr-con
Comments: 10 pages, 12 figures
\\
We investigate Bose-Einstein condensation for ultracold bosonic atoms in
two-dimensional systems. The functional renormalization group for the average
action allows us to follow the effective interactions from molecular scales
(microphysics) to the characteristic extension of the probe $l$ (macrophysics).
In two dimensions the scale dependence of the dimensionless interaction
strength $\lambda$ is logarithmic. Furthermore, for large $l$ the frequency
dependence of the inverse propagator becomes quadratic. We find an upper bound
for $\lambda$, and for large $\lambda$ substantial deviations from the
Bogoliubov results for the condensate depletion, the dispersion relation and
the sound velocity. The melting of the condensate above the critical
temperature $T_c$ is associated to a phase transition of the
Kosterlitz-Thouless type. The critical temperature in units of the density,
$T_c/n$, vanishes for $l\to\infty$ logarithmically.
\\ ( http://arxiv.org/abs/0805.2571 , 740kb)
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arXiv:0805.2539
Date: Fri, 16 May 2008 14:00:33 GMT (647kb)
Title: A method for the quantitative study of atomic transitions in a magnetic
field based on an atomic vapor cell with L=lambda
Authors: Armen Sargsyan, Grant Hakhumyan, Aram Papoyan, David Sarkisyan, Aigars
Atvars, and Marcis Auzinsh
Categories: physics.atom-ph
\\
We describe the so-called "Lambda-Zeeman method" to investigate individual
hyperfine transitions between Zeeman sublevels of atoms in an external magnetic
field of 0.1 mT - 0.25 T. Atoms are confined in a nanocell with thickness L =
Lambda, where Lambda is the resonant wavelength (794 nm or 780 nm for D1 or D2
line of Rb). Narrow resonances in the transmission spectrum of the nanocell are
split into several components in a magnetic field; their frequency positions
and probabilities depend on the B-field. Possible applications are described,
such as magnetometers with nanometric spatial resolution and tunable atomic
frequency references.
\\ ( http://arxiv.org/abs/0805.2539 , 647kb)
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arXiv:0805.2719
Date: Mon, 19 May 2008 15:43:21 GMT (126kb)
Title: Magnetism of Cold Fermionic Atoms on p-Band of an Optical Lattice
Authors: Lei Wang, Xi Dai, Shu Chen, and X. C. Xie
Categories: cond-mat.str-el cond-mat.other
Comments: 5 pages, 4 figures
\\
We carry out \textit{ab initio} study of ground state phase diagram of
spin-1/2 cold fermionic atoms within two-fold degenerate $p$-band of an
anisotropic optical lattice. Using the Gutzwiller variational approach, we show
that a robust ferromagnetic phase exists for a vast range of band fillings and
interacting strengths. The ground state crosses over from spin density wave
state to spin-1 Neel state at half filling. Additional harmonic trap will
induce spatial separation of varies phases. We also discuss several relevant
observable consequences and detection methods. Experimental test of the results
reported here may shed some light on the long-standing issue of itinerant
ferromagnetism.
\\ ( http://arxiv.org/abs/0805.2719 , 126kb)
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arXiv:0805.2726
Date: Sun, 18 May 2008 13:05:17 GMT (372kb)
Title: Superfluidity at the BEC-BCS crossover in two-dimensional Fermi gases
with population and mass imbalance
Authors: G. J. Conduit, P. H. Conlon, B. D. Simons
Categories: cond-mat.str-el cond-mat.other
Comments: 11 pages, 6 figures. Accepted by Phys. Rev. A
\\
We explore the zero temperature phase behavior of a two-dimensional
two-component atomic Fermi gas with population and mass imbalance in the regime
of the BEC-BCS crossover. Working in the mean-field approximation, we show that
the normal and homogeneous balanced superfluid phases are separated by an
inhomogeneous superfluid phase of Fulde-Ferrel-Larkin-Ovchinnikov (FFLO) type.
We obtain an analytical expression for the line of continuous transitions
separating the normal and inhomogeneous FFLO phases. We further show that the
transition from the FFLO phase to the homogeneous balanced superfluid is
discontinuous leading to phase separation. If the species have different
masses, the superfluid phase is favored when the lighter species is in excess.
We explore the implications of these findings for the properties of the
two-component Fermi gas in the atomic trap geometry. Finally, we compare and
contrast our findings with the predicted phase behavior of the electron-hole
bilayer system.
\\ ( http://arxiv.org/abs/0805.2726 , 372kb)
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arXiv:0805.2748
Date: Sun, 18 May 2008 19:17:42 GMT (384kb)
Title: Instability of condensation in the zero-range process with random
interaction
Authors: Stefan Grosskinsky, Paul Chleboun and Gunter M. Sch\"utz
Categories: cond-mat.stat-mech
Comments: 4 pages, 4 figures
\\
The zero-range process is a stochastic interacting particle system that is
known to exhibit a condensation transition analogous to Bose-Einstein
condensation. We present a detailed analysis of the condensation transition in
the presence of quenched disorder in the particle interactions. Using rigorous
probabilistic arguments we show that disorder changes the critical exponent in
the interaction strength below which a condensation transition may occur in a
finite system. Moreover, for some natural assumptions on the disorder
distribution the critical density is shown to diverge with system size. In the
thermodynamic limit the condensation transition is then unstable with respect
to interaction disorder.
\\ ( http://arxiv.org/abs/0805.2748 , 384kb)
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arXiv:0805.2798
Date: Mon, 19 May 2008 19:07:09 GMT (233kb)
Title: Cooper pair turbulence in atomic Fermi gases
Authors: M. Dzero, E. A. Yuzbashyan, B. L. Altshuler
Categories: cond-mat.supr-con cond-mat.other
Comments: 4 pages, 2 figures
\\
We investigate the stability of spatially uniform solutions for the
collisionless dynamics of a fermionic superfluid. We demonstrate that, if the
system size is larger than the superfluid coherence length, the solution
characterized by a periodic in time order parameter is unstable with respect to
spatial fluctuations. The instability is due to the parametric excitations of
pairing modes with opposite momenta. The growth of spatial modulations is
suppressed by nonlinear effects resulting in a state characterized by a random
superposition of wave packets of the superfluid order parameter. We suggest
that this state can be probed by spectroscopic noise measurements.
\\ ( http://arxiv.org/abs/0805.2798 , 233kb)
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arXiv:0805.2613
Date: Fri, 16 May 2008 20:07:26 GMT (7678kb)
Title: Microscopic atom optics: from wires to an atom chip
Authors: R. Folman, P. Kruger, J. Schmiedmayer, J. Denschlag, C. Henkel
Categories: quant-ph
Comments: published version can be downloaded at: http://www.atomchip.org ->
Review Articles
Journal-ref: Adv. in At. Mol. and Opt. Physics 48, 263-356 (2002)
\\
We give a comprehensive overview of the development of micro traps, from the
first experiments on guiding atoms using current carrying wires in the early
1990's to the creation of a BEC on an atom chip.
\\ ( http://arxiv.org/abs/0805.2613 , 7678kb)
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arXiv:0805.2708
Date: Mon, 19 May 2008 11:39:19 GMT (368kb,D)
Title: Modulation transfer spectroscopy in atomic rubidium
Authors: D. J. McCarron, S. A. King and S. L. Cornish
Categories: physics.atom-ph
Comments: 13 pages, 7 figures
\\
We report modulation transfer spectroscopy on the D2 transitions in 85Rb and
87Rb using a simple home-built electro-optic modulator (EOM). We show that both
the gradient and amplitude of modulation transfer spectroscopy signals, for the
87Rb F=2 to F'=3 and the 85Rb F=3 to F'=4 transitions, can be significantly
enhanced by expanding the beams, improving the signals for laser frequency
stabilization. The signal gradient for these transitions is increased by a
factor of 3 and the peak to peak amplitude was increased by a factor of 2. The
modulation transfer signal for the 85Rb F=2 to F' transitions is also presented
to highlight how this technique can generate a single, clear line for laser
frequency stabilization even in cases where there are a number of closely
spaced hyperfine transitions.
\\ ( http://arxiv.org/abs/0805.2708 , 368kb)
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arXiv:0805.3031
Date: Tue, 20 May 2008 19:02:34 GMT (88kb)
Title: Proposed realization of itinerant ferromagnetism in optical lattices
Authors: Shizhong Zhang and Congjun Wu
Categories: cond-mat.str-el cond-mat.mtrl-sci
\\
We propose to realize the itinerant ferromagnetism of two-component cold
fermionic atoms in the $p$-orbital bands in optical lattices. The band flatness
in the two-dimensional honeycomb lattice dramatically amplifies the interaction
effect driving the ferromagnetic transitions even with a weak repulsive
interaction. This has the advantage to maintain the system stability without
decaying to the dimer-molecule state which occurs as approaching the Feshbach
resonance from the side with the positive scattering length. Experimental
signatures and detections are also discussed.
\\ ( http://arxiv.org/abs/0805.3031 , 88kb)
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arXiv:0805.3047
Date: Tue, 20 May 2008 10:54:25 GMT (177kb)
Title: Critical Temperature Curve in the BEC-BCS Crossover
Authors: Evgeni Burovski, Evgeny Kozik, Nikolay Prokof'ev, Boris Svistunov,
Matthias Troyer
Categories: cond-mat.str-el cond-mat.supr-con
Comments: revtex, 4 pages, 3 figures
\\
The strongly-correlated regime of the BCS-BEC crossover can be realized by
diluting a system of two-component fermions with a short-range attractive
interaction. We investigate this system via a novel continuous-space-time
diagrammatic determinant Monte Carlo method and determine the universal curve
$T_c/\epsilon_F$ for the transition temperature between the normal and the
superfluid states as a function of the scattering length with the maximum on
the BEC side. At unitarity, we confirm that $T_c/\epsilon_F = 0.152(7)$.
\\ ( http://arxiv.org/abs/0805.3047 , 177kb)
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arXiv:0805.2990
Date: Tue, 20 May 2008 01:56:48 GMT (39kb,D)
Title: Motion of quantum particle in delute Bose-Einstein condensate at zero
temperature
Authors: Alexey Novikov and Mikhail Ovchinnikov
Categories: quant-ph
\\
The motion of single quantum particle through Bose-Einstein condensate (BEC)
is considered within perturbation theory with respect to the particle-BEC
interaction. The Hamiltonian of BEC is diagonalized by means of Bogoliubov's
method. The process of dissipation due to the creation of excitation in BEC is
analyzed and the dissipation rate is calculated in the lowest order of
perturbation theory. The Landau's criterion for energy dissipation in BEC is
then recovered. The energy spectrum of the impurity particle due to the
interaction with BEC and its effective mass are evaluated.
\\ ( http://arxiv.org/abs/0805.2990 , 39kb)
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arXiv:0805.3060
Date: Tue, 20 May 2008 19:57:29 GMT (76kb)
Title: On the problem of detection of genuine multipartite correlations
Authors: Andrzej Grudka, Michal Horodecki, Pawel Horodecki, Ryszard Horodecki
Categories: quant-ph
Comments: Comments welcome
\\
We propose two postulates which each measure or indicator of genuine
multipartite correlations should satisfy. We show that covariance does not
satisfy any of these postulates. Hence it cannot be used as an indicator of
genuine multipartite classical correlations. We also propose possible
definition of genuine multipartite classical correlations.
\\ ( http://arxiv.org/abs/0805.3060 , 76kb)
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arXiv:0805.3069
Date: Tue, 20 May 2008 12:47:34 GMT (17kb)
Title: Mott Plateau in Trapped Bose-Fermi Mixture
Authors: Akiko Masaki, Sota Tsukada, and Hiroyuki Mori
Categories: quant-ph
Comments: 8 pages, 2 figures
Journal-ref: Journal of the Physical Society of Japan, vol 77, No.5, May, 2008,
054301
DOI: 10.1143/JPSJ.77.054301
\\
Boson-Fermion mixture confined on an optical lattice is numerically studied.
Mott-plateau like behavior is observed under certain conditions in the density
profile of the bosons and fermions as one sees in bosonic atoms in a trap
potential. In the Mott plateau area, the total number of the bosons and
fermions at each site is kept to an integer value but both local density of the
bosons and that of the fermions take some intermediate values. Unlike bosonic
or fermionic Mott insulators, the bosons and fermions can move even in the Mott
plateau area by exchanging their positions. With Monte Carlo simulations we
demonstrate the formation of the Mott plateau, examine the property of the
bosons and fermions by measuring the densities and local density fluctuations,
and give discussion on this rather new state.
\\ ( http://arxiv.org/abs/0805.3069 , 17kb)
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arXiv:0805.3083
Date: Tue, 20 May 2008 14:00:29 GMT (83kb)
Title: Generation of nonground-state Bose-Einstein condensates by modulating
atomic interactions
Authors: E. R. F. Ramos, E. A. L. Henn, J. A. Seman, M. A. Caracanhas, K. M. F.
Magalh\~aes, V. I. Yukalov, V. S. Bagnato
Categories: quant-ph
Comments: 4 pages, 3 figures, 1 table, submitted to PRL
\\
A new technique is proposed for creating nonground-state Bose-Einstein
condensates in a trapping potential by means of the temporal modulation of
atomic interactions. Applying a time-dependent spatially homogeneous magnetic
field modifies the atomic scattering length. An alternating modulation of the
scattering length excites the condensate, which, under special conditions, can
be transferred to an excited nonlinear coherent mode. It is shown that there
occurs a phase-transition-like behavior in the time-averaged population
imbalance between the ground and excited states. The application of the
suggested technique to realistic experimental conditions is analyzed and it is
shown that the considered effect can be realized for experimentally available
condensates.
\\ ( http://arxiv.org/abs/0805.3083 , 83kb)
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arXiv:0805.2937
Date: Mon, 19 May 2008 20:45:31 GMT (196kb)
Title: Achieving very long lifetimes in optical lattices with pulsed cooling
Authors: Michael J. Gibbons, Soo Y. Kim, Kevin M. Fortier, Peyman Ahmadi, and
Michael S. Chapman
Categories: physics.atom-ph
Comments: 4 pages, 5 figures
\\
We have realized a one dimensional optical lattice for individual atoms with
a lifetime >300 s, which is 5 times longer than previously reported. In order
to achieve this long lifetime, it is necessary to laser cool the at-oms briefly
every 20 s to overcome heating due to technical fluctuations in the trapping
potential. Without cooling, we observe negligible atom loss within the first 20
s followed by an exponential decay with a 62 s time constant. We obtain
quantitative agreement with the measured fluctuations of the trapping potential
and the corresponding theoretical heating rates.
\\ ( http://arxiv.org/abs/0805.2937 , 196kb)
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arXiv:0805.2993
Date: Tue, 20 May 2008 02:13:30 GMT (363kb)
Title: Anomalous dispersion and negative group velocity in a coherence-free
cold atomic medium
Authors: William G.A. Brown, Russell McLean, Andrei Sidorov, Peter Hannaford
and Alexander Akulshin
Categories: physics.optics physics.atom-ph
Comments: 15 pages, 5 figures
\\
We have observed the propagation of an approximately 35 ns long light pulse
with a negative group velocity through a laser-cooled 85Rb atomic medium. The
anomalous dispersion results from linear atom-light interaction, and is
unrelated to long-lived ground state coherences often associated with fast
light in atomic media. The observed negative group velocity (-c/360) in the Rb
magneto-optical trap for a pulse attenuated by less than 50% is in good
agreement with the value of dispersion measured independently by an RF
heterodyne method. The spectral region of anomalous dispersion is between 15
and 40 MHz, which is an order of magnitude wider than that typically associated
with ground-state coherences.
\\ ( http://arxiv.org/abs/0805.2993 , 363kb)
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arXiv:0805.3226
Date: Wed, 21 May 2008 08:36:59 GMT (461kb)
Title: Thermodynamics of a trapped unitary Fermi gas
Authors: R. Haussmann and W. Zwerger
Categories: cond-mat.stat-mech
Comments: 9 pages, 5 figures
Report-no: KN-08-05
\\
Thermodynamic properties of an ultracold Fermi gas in a harmonic trap are
calculated within a local density approximation, using a conserving many-body
formalism for the BCS to BEC crossover problem, which has been developed by
Haussmann et al. [Phys. Rev. A 75, 023610 (2007)]. We focus on the unitary
regime near a Feshbach resonance and determine the local density and entropy
profiles and the global entropy S(E) as a function of the total energy E. Our
results are in good agreement with both experimental data and previous
analytical and numerical results for the thermodynamics of the unitary Fermi
gas. The value of the Bertsch parameter at T=0 and the superfluid transition
temperature, however, differ appreciably. We show that, well in the superfluid
regime, removal of atoms near the cloud edge enables cooling far below
temperatures that have been reached so far.
\\ ( http://arxiv.org/abs/0805.3226 , 461kb)
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arXiv:0805.3263
Date: Wed, 21 May 2008 12:04:46 GMT (481kb)
Title: Density engineering of an oscillating soliton/vortex ring in a
Bose-Einstein condensate
Authors: Itay Shomroni, Elias Lahoud, Shahar Levy, and Jeff Steinhauer
Categories: cond-mat.other
\\
When two Bose-Einstein condensates (BEC's) collide with high collisional
energy, the celebrated matter wave interference pattern results. For lower
collisional energies the repulsive interaction energy becomes significant, and
the interference pattern evolves into an array of grey solitons. The lowest
collisional energy, producing a single pair of solitons, has not been probed.
We use density engineering on the healing length scale to produce such a pair
of solitons. These solitons then evolve periodically between vortex rings and
solitons, which we image in-situ on the healing length scale. The stable,
periodic evolution is in sharp contrast to the behavior of previous
experiments, in which the solitons decay irreversibly into vortex rings via the
snake instability. The evolution can be understood in terms of conservation of
mass and energy in a narrow condensate. The periodic oscillation between two
qualitatively different forms seems to be a rare phenomenon in nature.
\\ ( http://arxiv.org/abs/0805.3263 , 481kb)
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arXiv:0805.3315
Date: Wed, 21 May 2008 17:18:38 GMT (120kb)
Title: Exploring the order parameter symmetry of p-wave Fermi condensates
Authors: Wei Zhang and C.A.R. Sa de Melo
Categories: cond-mat.str-el cond-mat.supr-con
Comments: 4+pages, 2 figures
\\
We discuss the time-of-flight expansion of dilute p-wave Fermi condensates on
the BEC side of Feshbach resonances, as a way to extract information about the
order parameter symmetry for superfluidity. We show that the cloud profile is
in general sensitive to the interaction strength between fermions, the
magnitude and direction of external magnetic fields, and to the angular
momentum projection of the order parameter. In particular, due to the
anisotropic nature of p-wave interactions we show that the time-of-flight
expansion of a p-wave superfluid is anisotropic even if the superfluid is
confined to a completely isotropic trap, unlike the case of Bose or s-wave
Fermi condensates, which under the same circumstances expand isotropically.
Furthermore, we demonstrate that expanding p-wave superfluids released from
axially symmetric traps experience anisotropy inversions, where the aspect
ratio between the axial and radial directions change during expansion, while
the axial symmetry can also be lost reflecting the spatial anisotropy of the
underlying interaction.
\\ ( http://arxiv.org/abs/0805.3315 , 120kb)
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arXiv:0805.3180
Date: Wed, 21 May 2008 07:10:17 GMT (36kb)
Title: GHZ Entanglement Witnesses for Non-interacting Fermi Systems
Authors: H. Habibian, J. W. Clark, K. Hingerl, N. Behbood
Categories: quant-ph
Comments: 11 pages, 1 figure
\\
In this paper we investigate GHZ\W entanglement for indistinguishable
systems. For this, we introduce new classes of parameterized GHZ entanglement
witnesses to identify two different classes of genuine entangled states for
tripartite non-interacting Fermionic systems which lead to two different
boundary conditions. Contrary to Hahn-Banach theorem, which requires convexity,
by choosing proper operators the problem of finding GHZ entanglement witnesses
can be reduced to linear programming problem. We see that a spin chain with
periodic boundary conditions is a good model system to introduce new class of
parameterized witnesses. Also, one can find the proper entanglement witness by
generalizing entangled densities, here, using the mixed entangled density of a
non-interacting Fermi gas leads to a proper GHZ witness. It is shown for three
non-interacting Fermions that all types of entanglement as well as biseparable
states exist. We also show PPT entangled states in non-interacting Fermi gas
which can be detected by our optimal Non-decomposable GHZ witness. Finally we
confirm that pure Bell states, i.e., three party entanglement without any
biseparable mixture, do not exist in a non-interacting Fermi gas.
\\ ( http://arxiv.org/abs/0805.3180 , 36kb)
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arXiv:0805.3239
Date: Wed, 21 May 2008 09:44:51 GMT (16kb)
Title: A robust system for Quantum Computation using Coherent Population Trap
states of neutral atoms
Authors: Ashok Vudayagiri
Categories: quant-ph
Comments: 10 pages, 3 figures, submitted to PRA rapid comm
\\
A robust system for use of Quantum Computation using neutral atoms is
presented in this communication. This scheme exploits a multilevel atomic
system interacting with two lasers in such a way that it leads to formation of
two Coherent Population Trap (CPT) states. The atomic population can be pumped
alternatively between these two CPT states or any desired superposition of the
two can also be formed. These two CPT states can then be mapped to two Qubits
for Quantum Computation. Preparation of any desired state and formation of CNOT
gates are explained below. A scheme for preparing 1-D lattice of mutually
interacting spin systems, which mimic behaviour of magnetic spin systems is
also shown. Atoms in CPT states do not interact with the lasers that prepare it
and hence are free of perturbation. The states involved here are also made up
of only ground states of bare atoms and hence are free of decoherence due to
spontaneous emission. Thus, the configuration studied here is a good example of
a very robust system.
\\ ( http://arxiv.org/abs/0805.3239 , 16kb)
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arXiv:0805.3388
Date: Thu, 22 May 2008 18:59:32 GMT (45kb)
Title: Threshold for Chaos and Thermalization in One-Dimensional Mean-Field
Bose-Hubbard Model
Authors: Amy C. Cassidy, Douglas Mason, Vanja Dunjko, Maxim Olshanii
Categories: cond-mat.other cond-mat.stat-mech
Comments: 5 pages, 3 figures
\\
We study the threshold for chaos and its relation to thermalization in the 1D
mean-field Bose-Hubbard model, which in particular describes atoms in optical
lattices. We identify the threshold for chaos and show that it is indeed a
precursor of thermalization. Far above the threshold, the state of the system
after relaxation is governed by the usual laws of statistical mechanics.
\\ ( http://arxiv.org/abs/0805.3388 , 45kb)
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arXiv:0805.3348
Date: Wed, 21 May 2008 20:03:50 GMT (625kb)
Title: Optimal light storage in atomic vapor
Authors: Nathaniel B. Phillips, Alexey V. Gorshkov, and Irina Novikova
Categories: quant-ph
Comments: 10 pages, 9 figures
\\
We study procedures for the optimization of efficiency of light storage and
retrieval based on the dynamic form of electromagnetically induced transparency
(EIT) in warm Rb vapor. We present a detailed analysis of two recently
demonstrated optimization protocols: a time-reversal-based iteration procedure,
which finds the optimal input signal pulse shape for any given control field,
and a procedure based on the calculation of an optimal control field for any
given signal pulse shape. We verify that the two procedures are consistent with
each other, and that they both independently achieve the maximum memory
efficiency for any given optical depth. We observe good agreement with
theoretical predictions for moderate optical depths (<25), while at higher
optical depths the experimental efficiency falls below the theoretically
predicted values. We identify possible effects responsible for this reduction
in memory efficiency.
\\ ( http://arxiv.org/abs/0805.3348 , 625kb)
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arXiv:0805.3510
Date: Thu, 22 May 2008 17:41:07 GMT (538kb)
Title: Energy distribution and cooling of a single atom in an optical tweezer
Authors: C. Tuchendler, A. M. Lance, A. Browaeys, Y. R. P. Sortais and P.
Grangier
Categories: quant-ph
Comments: 10 pages, 6 figures, submitted to PRA
\\
We investigate experimentally the energy distribution of a single rubidium
atom trapped in a strongly focused dipole trap under various cooling regimes.
Using two different methods to measure the mean energy of the atom, we show
that the energy distribution of the radiatively cooled atom is close to
thermal. We then demonstrate how to reduce the energy of the single atom, first
by adiabatic cooling, and then by truncating the Boltzmann distribution of the
single atom. This provides a non-deterministic way to prepare the atom at low
microKelvin temperatures, close to the ground state of the trapping potential.
\\ ( http://arxiv.org/abs/0805.3510 , 538kb)
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arXiv:0710.5812
replaced with revised version Fri, 16 May 2008 06:08:09 GMT (94kb)
Title: Spatial nonlocal pair correlations in a repulsive 1D Bose gas
Authors: A. G. Sykes, D. M. Gangardt, M. J. Davis, K. Viering, M. G. Raizen,
and K. V. Kheruntsyan
Categories: cond-mat.other cond-mat.stat-mech
Comments: Final published version, modified title
Journal-ref: Phys. Rev. Lett. 100, 160406 (2008)
\\ ( http://arxiv.org/abs/0710.5812 , 94kb)
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arXiv:0712.0376
replaced with revised version Fri, 16 May 2008 18:34:12 GMT (11kb)
Title: Analog cosmology with spinor Bose-Einstein condensates
Authors: E. Calzetta
Categories: cond-mat.other
Comments: 8 pages. Fixed typos and updated references
\\ ( http://arxiv.org/abs/0712.0376 , 11kb)
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arXiv:0804.1220
replaced with revised version Fri, 16 May 2008 10:02:50 GMT (4kb)
Title: The model charged spinless nonideal Bose gas within finite temperatures
Authors: V. N. Minasyan
Categories: cond-mat.supr-con
Comments: 8 pages
\\ ( http://arxiv.org/abs/0804.1220 , 4kb)
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arXiv:0805.0847
replaced with revised version Fri, 16 May 2008 13:35:25 GMT (840kb)
Title: Properties of rotating two-component Bose-Einstein Condensates
Authors: I. Corro, R.G. Scott and A.M. Martin
Categories: cond-mat.other quant-ph
Comments: 5 pages, 3 figures; corrected typos in equations, added references,
some rewording
\\ ( http://arxiv.org/abs/0805.0847 , 840kb)
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arXiv:0802.2902
replaced with revised version Thu, 15 May 2008 14:19:57 GMT (896kb)
Title: Reflection of OH molecules from magnetic mirrors
Authors: Markus Metsala, Joop J. Gilijamse, Steven Hoekstra, Sebastiaan Y. T.
van de Meerakker, and Gerard Meijer
Categories: physics.chem-ph physics.atom-ph
Comments: 10 pages, 5 figures
Journal-ref: New Journal of Physics 10 (2008) 053018
DOI: 10.1088/1367-2630/10/5/053018
\\ ( http://arxiv.org/abs/0802.2902 , 896kb)
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arXiv:0711.4065
replaced with revised version Mon, 19 May 2008 08:24:12 GMT (613kb)
Title: FFLO state in 1, 2, and 3 dimensional optical lattices combined with a
non-uniform background potential
Authors: T.K. Koponen, T. Paananen, J.-P. Martikainen, M.R. Bakhtiari, and P.
Torma
Categories: cond-mat.supr-con cond-mat.str-el
Comments: 18 pages, 10 figures, journal version
Journal-ref: New Journal of Physics 10 (2008) 045104
\\ ( http://arxiv.org/abs/0711.4065 , 613kb)
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arXiv:0801.3127
replaced with revised version Sun, 18 May 2008 11:10:02 GMT (43kb)
Title: Phase Diagram of Cold Polarized Fermi Gas in Two Dimensions
Authors: Lianyi He and Pengfei Zhuang
Categories: cond-mat.supr-con cond-mat.other cond-mat.str-el physics.atom-ph
Comments: V3: extended version according to referee's comment. 12 pages, 6
figures. Analytical results of density profile in trapped system are reported
\\ ( http://arxiv.org/abs/0801.3127 , 43kb)
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arXiv:0804.4861
replaced with revised version Tue, 20 May 2008 10:22:27 GMT (74kb)
Title: Interfacing light and single atoms with a lens
Authors: Meng Khoon Tey, Syed Abdullah Aljunid, Florian Huber, Brenda Chng,
Zilong Chen, Gleb Maslennikov and Christian Kurtsiefer
Categories: quant-ph
Comments: 18 pages, 8 figures; typos corrected
\\ ( http://arxiv.org/abs/0804.4861 , 74kb)
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arXiv:0704.3275
replaced with revised version Wed, 21 May 2008 16:52:05 GMT (187kb)
Title: Matter-wave interference in s-wave and p-wave Fermi condensates
Authors: Wei Zhang and C. A. R. Sa de Melo
Categories: cond-mat.str-el cond-mat.supr-con
Comments: 8 pages, 5 figures; Phys. Rev. A 76, 013627 (2007)
Journal-ref: Phys. Rev. A 76, 013627 (2007)
DOI: 10.1103/PhysRevA.76.013627
\\ ( http://arxiv.org/abs/0704.3275 , 187kb)
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arXiv:0706.1253
replaced with revised version Wed, 21 May 2008 16:42:17 GMT (303kb)
Title: Finite temperature phase diagram of trapped Fermi gases with population
imbalance
Authors: Wei Zhang and L.-M. Duan
Categories: cond-mat.str-el cond-mat.supr-con
Comments: 9 pages, 7 figures
Journal-ref: Phys. Rev. A 76, 042710 (2007)
DOI: 10.1103/PhysRevA.76.042710
\\ ( http://arxiv.org/abs/0706.1253 , 303kb)
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arXiv:0802.0700
replaced with revised version Wed, 21 May 2008 17:15:53 GMT (423kb)
Title: Characteristics of Bose-Einstein condensation in an optical lattice
Authors: G.-D. Lin, Wei Zhang, and L.-M. Duan
Categories: cond-mat.supr-con cond-mat.stat-mech
Comments: 12 pages, 13 figures; Revised version with new figures; Phys. Rev. A
77, 043626 (2008)
Journal-ref: Phys. Rev. A 77, 043626 (2008)
DOI: 10.1103/PhysRevA.77.043626
\\ ( http://arxiv.org/abs/0802.0700 , 423kb)
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arXiv:0802.3818
replaced with revised version Wed, 21 May 2008 13:41:46 GMT (63kb)
Title: Dynamical Structure Factor and Spin-Density Separation for a
Weakly-Interacting Two-Component Bose Gas
Authors: M.-C. Chung and A. B. Bhattacherjee
Categories: cond-mat.other
Comments: 4 pages, 2 figures
\\ ( http://arxiv.org/abs/0802.3818 , 63kb)
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arXiv:0803.1405
replaced with revised version Wed, 21 May 2008 06:44:39 GMT (339kb,D)
Title: Collisional Properties of p-Wave Feshbach Molecules
Authors: Yasuhisa Inada, Munekazu Horikoshi, Shuta Nakajima, Makoto
Kuwata-Gonokami, Masahito Ueda, Takashi Mukaiyama
Categories: cond-mat.other
\\ ( http://arxiv.org/abs/0803.1405 , 339kb)
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arXiv:0805.0761
replaced with revised version Wed, 21 May 2008 18:55:39 GMT (777kb)
Title: Nonlinear Waves in Bose-Einstein Condensates: Physical Relevance and
Mathematical Techniques
Authors: R. Carretero-Gonzalez, D.J. Frantzeskakis, and P.G. Kevrekidis
Categories: cond-mat.other
Comments: 69 pages, 10 figures, to appear in Nonlinearity, 2008. V2: new
references added, fixed typos
\\ ( http://arxiv.org/abs/0805.0761 , 777kb)
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arXiv:0805.0847
replaced with revised version Wed, 21 May 2008 06:51:59 GMT (840kb)
Title: Properties of rotating two-component Bose-Einstein Condensates
Authors: I. Corro, R.G. Scott and A.M. Martin
Categories: cond-mat.other quant-ph
Comments: 5 pages, 3 figures; corrected typos in equations, added references,
some rewording; added a reference
\\ ( http://arxiv.org/abs/0805.0847 , 840kb)
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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 Wed Jun 11 2008 - 11:38:17 EST
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