Article

 

Driving Bose-Einstein Condensate Vorticity with a Rotating Normal Cloud Público Deposited

https://scholar.colorado.edu/concern/articles/dn39x2192
Abstract
  • We have developed an evaporative cooling technique that accelerates the rotation of an ultracold ⁸⁷Rb gas, confined in a static harmonic potential. As a normal gas is evaporatively spun up and cooled below quantum degeneracy, it is found to nucleate vorticity in a Bose-Einstein condensate. Measurements of the condensate’s aspect ratio and surface-wave excitations are consistent with effective rigid-body rotation. Rotation rates of up to 94% of the centrifugal limit are inferred. A threshold in the normal cloud’s rotation is observed for the intrinsic nucleation of the first vortex. The threshold value lies below the prediction for a nucleation mechanism involving the excitation of surface waves of the condensate.
Creator
Date Issued
  • 2001-11-19
Academic Affiliation
Journal Title
Journal Issue/Number
  • 21
Journal Volume
  • 87
File Extent
  • 210403-1-210403-4
Última modificação
  • 2019-12-05
Resource Type
Declaração de direitos
DOI
  • 10.1103/PhysRevLett.87.210403
ISSN
  • 0031-9007
Language

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