Observation of vortex phase singularities in Bose-Einstein condensates.

نویسندگان

  • S Inouye
  • S Gupta
  • T Rosenband
  • A P Chikkatur
  • A Görlitz
  • T L Gustavson
  • A E Leanhardt
  • D E Pritchard
  • W Ketterle
چکیده

We have observed phase singularities due to vortex excitation in Bose-Einstein condensates. Vortices were created by moving a laser beam through a condensate. They were observed as dislocations in the interference fringes formed by the stirred condensate and a second unperturbed condensate. The velocity dependence for vortex excitation and the time scale for re-establishing a uniform phase across the condensate were determined.

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عنوان ژورنال:
  • Physical review letters

دوره 87 8  شماره 

صفحات  -

تاریخ انتشار 2001