Hydrodynamic flow of expanding Bose-Einstein condensates
Soft Condensed Matter
2009-11-10 v1
Abstract
We study expansion of quasi-one-dimensional Bose-Einstein condensate (BEC) after switching off the confining harmonic potential. Exact solution of dynamical equations is obtained in framework of the hydrodynamic approximation and it is compared with the direct numerical simulation of the full problem showing excellent agreement at realistic values of physical parameters. We analyze the maximum of the current density and estimate the velocity of expansion. The results of the 1D analysis provides also qualitative understanding of some properties of BEC expansion observed in experiments.
Cite
@article{arxiv.cond-mat/0307191,
title = {Hydrodynamic flow of expanding Bose-Einstein condensates},
author = {V. A. Brazhnyi and A. M. Kamchatnov and V. V. Konotop},
journal= {arXiv preprint arXiv:cond-mat/0307191},
year = {2009}
}
Comments
5 pages, 3 figures, RevTeX4. To appear in Physical Review A