Analytic vortex dynamics in an annular Bose-Einstein condensate
L. A. Toikka, K.-A. Suominen
2016
Physical Review A
We consider analytically the dynamics of an arbitrary number and configuration of vortices in an annular Bose-Einstein condensate obtaining expressions for the free energy and vortex precession rates to logarithmic accuracy. We also obtain lower bounds for the lifetime of a single vortex in the annulus. Our results enable a closed-form analytic treatment of vortex-vortex interactions in the annulus that is exact in the incompressible limit. The incompressible hydrodynamics that is developed
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... paves the way for more general analytical treatments of vortex dynamics in non-simply connected geometries.
doi:10.1103/physreva.93.053613
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