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

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

2002-11-06

arxiv.org/abs/cond-mat/0211101v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.90.100403

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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