Local vortex nucleation and the surface mode spectrum of large condensates

Details Local vortex nucleation and the surface mode spectrum of large condensates Local vortex nucleation and the surface mode spectrum of large condensates

2001-06-29

arxiv.org/abs/cond-mat/0106619v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 2 figures, 1 table

Scientific paper

10.1103/PhysRevLett.87.240401

A combination of analytical and numerical approaches obtains the complete dispersion curve for surface excitations in a condensate held in a plane linear potential. This improvement on previous approximate results yields an accurate formula for the local Landau critical velocity for vortex nucleation at the surface of a sufficiently large condensate, which agrees very well with recent experiments. The dispersion curve for surface modes at a hard wall potential is also presented, for contrast.

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