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Kelvin-Tkachenko waves of few-vortex arrays in trapped Bose-Einstein condensates

Published 21 Jul 2010 in cond-mat.quant-gas and quant-ph | (1007.3548v2)

Abstract: We have calculated the low-lying elementary excitations of three-dimensional few-vortex arrays in trapped Bose-Einstein condensates. The number of different Kelvin-Tkachenko vortex wave branches matches the number of vortices in the condensate. The lowest odd-parity modes exhibit superfluid gyroscopic vortex motion. Experimentally, these modes could be excited and observed individually or in connection with the formation and decay of quantum turbulence.

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