Vortices in Bose-Einstein Condensed Na Atoms

Details Vortices in Bose-Einstein Condensed Na Atoms Vortices in Bose-Einstein Condensed Na Atoms

2001-11-20

arxiv.org/abs/cond-mat/0111357v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages

Scientific paper

There are surface modes on the Bose-Einstein condensed Na atoms so that the number of vortices diverges when the stirring frequency becomes equal to that of the surface waves. We introduce the finite life time of the surface modes so that the number of vortices becomes finite. Usually the number of vortices is a linear function of the stirring frequency. We find that this linearity is destroyed by the finite life time and a peaked function emerges with several peaks, one for each surface mode. The vortices become normal, as they should be, so that there occurs a phase transition from normal to the superfluid state.

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