Nonlinear Transport of Bose-Einstein Condensates Through Waveguides with Disorder
Abstract
We study the coherent flow of a guided Bose-Einstein condensate incident over a disordered region of length L. We introduce a model of disordered potential that originates from magnetic fluctuations inherent to microfabricated guides. This model allows for analytical and numerical studies of realistic transport experiments. The repulsive interaction among the condensate atoms in the beam induces different transport regimes. Below some critical interaction (or for sufficiently small L) a stationary flow is observed. In this regime, the transmission decreases exponentially with L. For strong interaction (or large L), the system displays a transition towards a time dependent flow with an algebraic decay of the time averaged transmission.
Keywords
Cite
@article{arxiv.cond-mat/0509446,
title = {Nonlinear Transport of Bose-Einstein Condensates Through Waveguides with Disorder},
author = {Tobias Paul and Patricio Leboeuf and Nicolas Pavloff and Klaus Richter and Peter Schlagheck},
journal= {arXiv preprint arXiv:cond-mat/0509446},
year = {2009}
}
Comments
15 pages, 9 figures