Normal modes of a vortex in a trapped Bose-Einstein condensate
Normal modes of a vortex in a trapped Bose-Einstein condensate
A hydrodynamic description is used to study the normal modes of a vortex in a zero-temperature Bose-Einstein condensate. In the Thomas-Fermi limit, the circulating superfluid velocity far from the vortex core provides a small perturbation that splits the originally degenerate normal modes of a vortex-free condensate. The relative frequency shifts …