Off-axis vortices in trapped Bose condensed gases: angular momentum and frequency splitting

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  • 15 December 2000
Abstract
We consider non centered vortices and their arrays in a cylindrically trapped Bose-Einstein condensate at zero temperature. We study the kinetic energy and the angular momentum per particle in the Thomas Fermi regime and their dependence on the distance of the vortices from the center of the trap. Using a sum rule approach, we calculate the frequency shift of the collective low-lying excitations due to the presence of an off-center vortex or a vortex array.

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