Bose-Einstein condensate of kicked rotators with time-dependent interaction
Abstract
A modification of the quantum kicked rotator is suggested with a time-dependent delta-kicked interaction parameter which can be realized by a pulsed turn-on of a Feshbach resonance. The mean kinetic energy increases exponentially with time in contrast to a merely diffusive or linear growth for the first few kicks for the quantum kicked rotator with a constant interaction parameter. A recursive relation is derived in a self-consistent random phase approximation which describes this superdiffusive growth of the kinetic energy and is compared with numerical simulations. Unlike in the case of the quantum rotator with constant interaction, a Lax pair is not found. In general the delta-kicked interaction is found to lead to strong chaotic behaviour.
Keywords
Cite
@article{arxiv.cond-mat/0411648,
title = {Bose-Einstein condensate of kicked rotators with time-dependent interaction},
author = {B. Mieck and R. Graham},
journal= {arXiv preprint arXiv:cond-mat/0411648},
year = {2009}
}
Comments
4 pages, 3 figures