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Observation of Vortex Dipoles in an Oblate Bose-Einstein Condensate T. W. Neely,1
 

Summary: Observation of Vortex Dipoles in an Oblate Bose-Einstein Condensate
T. W. Neely,1
E. C. Samson,1
A. S. Bradley,2
M. J. Davis,3
and B. P. Anderson1,4
1
College of Optical Sciences, University of Arizona, Tucson, Arizona 85721, USA
2
Jack Dodd Centre for Quantum Technology, Department of Physics, University of Otago, Post Office Box 56, Dunedin, New Zealand
3
The University of Queensland, School of Mathematics and Physics, ARC Centre of Excellence for Quantum-Atom Optics,
Queensland 4072, Australia
4
Department of Physics, University of Arizona, Tucson, Arizona 85721, USA
(Received 17 December 2009; published 19 April 2010)
We report experimental observations and numerical simulations of the formation, dynamics, and
lifetimes of single and multiply charged quantized vortex dipoles in highly oblate dilute-gas Bose-
Einstein condensates (BECs). We nucleate pairs of vortices of opposite charge (vortex dipoles) by forcing
superfluid flow around a repulsive Gaussian obstacle within the BEC. By controlling the flow velocity we

  

Source: Anderson, Brian P. - Optical Sciences Center, University of Arizona

 

Collections: Physics