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Excitation spectrum of vortex lattices in rotating Bose-Einstein condensates

S. Choi·L. O. Baksmaty·S. J. Woo·N. P. Bigelow
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Abstract

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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S. Choi, L. O. Baksmaty, S. J. Woo, N. P. Bigelow. 2003-07-04. Excitation spectrum of vortex lattices in rotating Bose-Einstein condensates. https://doi.org/10.1103/physreva.68.031605

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