Excitation spectrum of vortex lattices in rotating Bose-Einstein condensates

Details Excitation spectrum of vortex lattices in rotating Bose-Einstein condensates Excitation spectrum of vortex lattices in rotating Bose-Einstein condensates

2003-06-23

arxiv.org/abs/cond-mat/0306549v2

Physical Review A Vol. 68, 031605(R) (2003)

Physics

Condensed Matter

Soft Condensed Matter

2 figures. Submitted to Physical Review A. v2 contains more references. No change in the main result

Scientific paper

10.1103/PhysRevA.68.031605

Using the coarse grain averaged hydrodynamic approach, we calculate the excitation spectrum of vortex lattices sustained in rotating Bose-Einstein condensates. The spectrum gives the frequencies of the common-mode longitudinal waves in the hydrodynamic regime, including those of the higher-order compressional modes. Reasonable agreement with the measurements taken in a recent JILA experiment is found, suggesting that one of the longitudinal modes reported in the experiment is likely to be the $n=2$, $m=0$ mode.

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