Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2002-11-06
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.
Bretin Vincent
Chevy Frédéric
Dalibard Jean
Rosenbusch Peter
Shlyapnikov Georgy V.
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