Surface modes and vortex formation in dilute Bose-Einstein condensates at finite temperatures

Details Surface modes and vortex formation in dilute Bose-Einstein condensates at finite temperatures Surface modes and vortex formation in dilute Bose-Einstein condensates at finite temperatures

2002-04-08

arxiv.org/abs/cond-mat/0204177v2

Phys. Rev. A 66, 035601 (2002)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 figures; version accepted to PRA

Scientific paper

10.1103/PhysRevA.66.035601

The surface mode spectrum is computed self-consistently for dilute Bose-Einstein condensates, providing the temperature dependence of the surface mode induced vortex nucleation frequency. Both the thermodynamic critical frequency for vortex stability and the nucleation frequency implied by the surface excitations increase as the critical condensation temperature is approached from below. The multipolarity of the destabilizing surface excitation decreases with increasing temperature. The computed finite-temperature critical frequencies support the experimental observations and the zero-temperature calculations for vortex nucleation.

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