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Summary: Manipulation of vortices by localized impurities in Bose-Einstein condensates
M. C. Davis,1
R. Carretero-González,1
Z. Shi,2
K. J. H. Law,2
P. G. Kevrekidis,2
and B. P. Anderson3
1
Department of Mathematics and Statistics and Computational Science Research Center, Nonlinear Dynamical Systems Group,
San Diego State University, San Diego, California 92182-7720, USA
2
Department of Mathematics and Statistics, University of Massachusetts, Amherst, Massachusetts 01003, USA
3
College of Optical Sciences and Department of Physics, University of Arizona, Tucson, Arizona 85721, USA
Received 16 May 2009; published 6 August 2009
We consider the manipulation of Bose-Einstein condensate vortices by optical potentials generated by
focused laser beams. It is shown that for appropriate choices of the laser strength and width it is possible to
successfully transport vortices to various positions inside the trap confining the condensate atoms. Further-
more, the full bifurcation structure of possible stationary single-charge vortex solutions in a harmonic potential
with this type of impurity is elucidated. The case when a moving vortex is captured by a stationary laser beam
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