Ultracold atoms in optical lattices with random on-site interactions
Other Condensed Matter
2009-11-11 v1
Abstract
We consider the physics of lattice bosons affected by disordered on-site interparticle interactions. Characteristic qualitative changes in the zero temperature phase diagram are observed when compared to the case of randomness in the chemical potential. The Mott-insulating regions shrink and eventually vanish for any finite disorder strength beyond a sufficiently large filling factor. Furthermore, at low values of the chemical potential both the superfluid and Mott insulator are stable towards formation of a Bose glass leading to a possibly non-trivial tricritical point. We discuss feasible experimental realizations of our scenario in the context of ultracold atoms on optical lattices.
Keywords
Cite
@article{arxiv.cond-mat/0506572,
title = {Ultracold atoms in optical lattices with random on-site interactions},
author = {H. Gimperlein and S. Wessel and J. Schmiedmayer and L. Santos},
journal= {arXiv preprint arXiv:cond-mat/0506572},
year = {2009}
}
Comments
4 pages, 3 eps figures