Vortex line and ring dynamics in trapped Bose-Einstein condensates
统计力学
2009-10-31 v1
摘要
Vortex dynamics in inhomogeneous Bose-Einstein condensates are studied numerically in two and three dimensions. We simulate the precession of a single vortex around the center of a trapped condensate, and use the Magnus force to estimate the precession frequency. Vortex ring dynamics in a spherical trap are also simulated, and we discover that a ring undergoes oscillatory motion around a circle of maximum energy. The position of this locus is calculated as a function of the number of condensed atoms. In the presence of dissipation, the amplitude of the oscillation will increase, eventually resulting in self-annihilation of the ring.
引用
@article{arxiv.cond-mat/9907325,
title = {Vortex line and ring dynamics in trapped Bose-Einstein condensates},
author = {B. Jackson and J. F. McCann and C. S. Adams},
journal= {arXiv preprint arXiv:cond-mat/9907325},
year = {2009}
}
备注
8 pages, 7 figures, ReVTex