Self trapping in the two-dimensional Bose-Hubbard model
Quantum Gases
2014-06-05 v3
Abstract
We study the expansion of harmonically trapped bosons in a two-dimensional lattice after suddenly turning off the confining potential. We show that, in the presence of multiple occupancies per lattice site and strong interactions, the system exhibits a clear dynamical separation into slowly and rapidly expanding clouds. We discuss how this effect can be understood within a simple picture by invoking doublons and Bose enhancement. This picture is corroborated by an analysis of the momentum distribution function in the regions with slowly and rapidly expanding bosons.
Cite
@article{arxiv.1307.0821,
title = {Self trapping in the two-dimensional Bose-Hubbard model},
author = {Andrew Jreissaty and Juan Carrasquilla and Marcos Rigol},
journal= {arXiv preprint arXiv:1307.0821},
year = {2014}
}
Comments
7 pages, 8 figures, as published