Figure 14.32: Generation of vortices and vortex lattices in a rotating 87Rb condensate. (Courtesy
E Engels).
[181]. The optimum configuration in terms of size and regularity is achieved after
500 ms. For times shorter than that, regular order is not completely established, and a
blurry structure is formed because of the misalignment of some vortices with respect to
the rotation axis. For times much longer than 500 ms, inelastic collisions induce atom
losses and a decrease in the number of vortices.
Several experiments have studied the nucleation of vortices in a BEC stirred by a
laser beam. In one experiment [ 182], vortices ...
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