Many-body quantum ratchet in a Bose-Einstein condensate
Other Condensed Matter
2007-09-06 v1 Quantum Physics
Abstract
We study the dynamics of a dilute Bose-Einstein condensate confined in a toroidal trap and exposed to a pair of periodically flashed optical lattices. We first prove that in the noninteracting case this system can present a quantum symmetry which forbids the ratchet effect classically expected. We then show how many-body atom-atom interactions, treated within the mean-field approximation, can break this quantum symmetry, thus generating directed transport.
Cite
@article{arxiv.cond-mat/0609535,
title = {Many-body quantum ratchet in a Bose-Einstein condensate},
author = {Dario Poletti and Giuliano Benenti and Giulio Casati and Baowen Li},
journal= {arXiv preprint arXiv:cond-mat/0609535},
year = {2007}
}
Comments
4 pages, 4 figures