Vortex Stability in a Trapped Bose Condensate

Details Vortex Stability in a Trapped Bose Condensate Vortex Stability in a Trapped Bose Condensate

1998-08-06

arxiv.org/abs/cond-mat/9808070v1

Physics

Condensed Matter

Statistical Mechanics

Latex, 6 pages, no figures, to appear in Proceedings of International Symposium on Quantum Fluids and Solids, 1998 (J. Low Tem

Scientific paper

A vortex in a trapped Bose-Einstein condensate can experience at least two types of instabilities. (1). Macroscopic hydrodynamic motion of the vortex core relative to the center of mass of the condensate requires some process to dissipate energy. (2). Microscopic small-amplitude normal modes can also induce an instability. In one specific example, the vortex core again moves relative to the overall center of mass, suggesting that there may be only a single physical mechanism.

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