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Phys. Rev. Lett. 84, 806–809 (2000)

Vortex Formation in a Stirred Bose-Einstein Condensate

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K. W. Madison, F. Chevy, W. Wohlleben*, and J. Dalibard†
Laboratoire Kastler Brossel, Département de Physique de l'Ecole Normale Supérieure, 24 rue Lhomond, 75005 Paris, France

Received 1 December 1999; published in the issue dated 31 January 2000

Using a focused laser beam we stir a Bose-Einstein condensate of 87Rb confined in a magnetic trap and observe the formation of a vortex for a stirring frequency exceeding a critical value. At larger rotation frequencies we produce states of the condensate for which up to four vortices are simultaneously present. We have also measured the lifetime of the single vortex state after turning off the stirring laser beam.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.84.806
DOI:
10.1103/PhysRevLett.84.806
PACS:
03.75.Fi, 32.80.Lg, 67.40.Db

*Permanent address: Max-Planck-Institute für Kernphysik, Heidelberg, Germany.

†Unité de Recherche de l'Ecole normale supérieure et del'Université Pierre et Marie Curie, associée au CNRS.

 
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