Quadrupole oscillation of a single-vortex Bose-Einstein condensate: evidence for Kelvin modes.

نویسندگان

  • V Bretin
  • P Rosenbusch
  • F Chevy
  • G V Shlyapnikov
  • J Dalibard
چکیده

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

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عنوان ژورنال:
  • Physical review letters

دوره 90 10  شماره 

صفحات  -

تاریخ انتشار 2003