Beyond mean-field dynamics in open Bose-Hubbard chains
Quantum Gases
2012-03-19 v1
Abstract
We investigate the effects of phase noise and particle loss on the dynamics of a Bose-Einstein condensate in an optical lattice. Starting from the many-body master equation, we discuss the applicability of generalized mean-field approximations in the presence of dissipation as well as methods to simulate quantum effects beyond mean-field by including higher-order correlation functions. It is shown that localized particle dissipation leads to surprising dynamics, as it can suppress decay and restore the coherence of a Bose-Einstein condensate. These effects can be applied to engineer coherent structures such as stable discrete breathers and dark solitons.
Cite
@article{arxiv.1203.3657,
title = {Beyond mean-field dynamics in open Bose-Hubbard chains},
author = {D. Witthaut and F. Trimborn and H. Hennig and G. Kordas and T. Geisel and S. Wimberger},
journal= {arXiv preprint arXiv:1203.3657},
year = {2012}
}
Comments
7 pages, 6 figure