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Vortex line and ring dynamics in trapped Bose-Einstein condensates

B. Jackson·J. F. McCann·C. S. Adams
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Abstract

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.

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B. Jackson, J. F. McCann, C. S. Adams. 1999-07-21. Vortex line and ring dynamics in trapped Bose-Einstein condensates. https://doi.org/10.1103/physreva.61.013604

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