Mean-field description of ultracold Bosons on disordered two-dimensional optical lattices
arXiv:0707.4113 · doi:10.1088/0953-4075/40/17/F02
Abstract
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.
Accepted for publication on JPB-FTC
References in corpus (5)
- Localization of bosonic atoms by fermionic impurities in a 3d optical lattice
- Quantum Monte Carlo simulations of confined bosonic atoms in optical lattices
- Bose-Einstein-condensed systems in random potentials
- Vortex configurations of bosons in an optical lattice
- Mean-field phase diagram for Bose-Hubbard Hamiltonians with random hopping