On Defect-Mediated Transitions in Bosonic Planar Lattices
Statistical Mechanics
2007-05-23 v1
Abstract
We discuss the finite-temperature properties of Bose-Einstein condensates loaded on a 2D optical lattice. In an experimentally attainable range of parameters the system is described by the XY model, which undergoes a Berezinskii-Kosterlitz-Thouless (BKT) transition driven by the vortex pair unbinding. The interference pattern of the expanding condensates provides the experimental signature of the BKT transition: near the critical temperature, the k=0 component of the momentum distribution sharply decreases.
Keywords
Cite
@article{arxiv.cond-mat/0506108,
title = {On Defect-Mediated Transitions in Bosonic Planar Lattices},
author = {A. Trombettoni and A. Smerzi and P. Sodano},
journal= {arXiv preprint arXiv:cond-mat/0506108},
year = {2007}
}