Mean-field description of ultracold Bosons on disordered two-dimensional optical lattices

Details Mean-field description of ultracold Bosons on disordered two-dimensional optical lattices Mean-field description of ultracold Bosons on disordered two-dimensional optical lattices

2007-07-27

arxiv.org/abs/0707.4113v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

Accepted for publication on JPB-FTC

Scientific paper

10.1088/0953-4075/40/17/F02

In the present paper we describe the properties induced by disorder on an ultracold gas of Bosonic atoms loaded into a two-dimensional optical lattice with global confinement ensured by a parabolic potential. Our analysis is centered on the spatial distribution of the various phases, focusing particularly on the superfluid properties of the system as a function of external parameters and disorder amplitude. In particular, it is shown how disorder can suppress superfluidity, while partially preserving the system coherence.

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