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Quadrupole Oscillation of a Single-Vortex Condensate: Evidence for Kelvin Modes

V. Bretin·P. Rosenbusch·F. Chevy·G. V. Shlyapnikov·J. Dalibard
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Abstract

We study the two transverse quadrupole modes of a cigar-shaped Bose-Einstein condensate with a single centered vortex. We show that the counter-rotating mode is more strongly damped than in the absence of a vortex, whereas the co-rotating mode is not affected appreciably by the vortex. We interpret this result as a decay of the counter-rotating quadrupole mode into two excitations of the vortex line, the so-called Kelvin modes. This is supported by direct observation of the wiggling vortex line.

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V. Bretin, P. Rosenbusch, F. Chevy, G. V. Shlyapnikov, J. Dalibard. 2002-11-06. Quadrupole Oscillation of a Single-Vortex Condensate: Evidence for Kelvin Modes. https://doi.org/10.1103/physrevlett.90.100403

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