Rotational Dynamics of Vortices in Confined Bose-Einstein Condensates

Details Rotational Dynamics of Vortices in Confined Bose-Einstein Condensates Rotational Dynamics of Vortices in Confined Bose-Einstein Condensates

2000-07-10

arxiv.org/abs/cond-mat/0007143v2

Physics

Condensed Matter

Soft Condensed Matter

6 Pages, 6 Figures

Scientific paper

10.1103/PhysRevA.63.043608

We derive the frequency of precession and conditions for stability for a quantized vortex in a single-component and a two-component Bose-Einstein condensate. The frequency of precession is proportional to the gradient of the free energy with respect to displacement of the vortex core. In a two-component system, it is possible to achieve a local minimum in the free energy at the center of the trap. The presence of such a minimum implies the existence of a region of energetic stability where the vortex cannot escape and where one may be able to generate a persistent current.

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