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Dynamical vortex phases in a Bose-Einstein condensate driven by a rotating optical lattice

Kenichi Kasamatsu·Makoto Tsubota
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Abstract

We present simulation results of the vortex dynamics in a trapped Bose-Einstein condensate in the presence of a rotating optical lattice. Changing the potential amplitude and the relative rotation frequency between the condensate and the optical lattice, we find a rich variety of dynamical phases of vortices. The onset of these different phases is described by the force balance of a driving force, a pinning force and vortex-vortex interactions. In particular, when the optical lattice rotates faster than the condensate, an incommensurate effect leads to a vortex liquid phase supported by the competition between the driving force and the dissipation.

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Kenichi Kasamatsu, Makoto Tsubota. 2006-12-20. Dynamical vortex phases in a Bose-Einstein condensate driven by a rotating optical lattice. https://doi.org/10.1103/physrevlett.97.240404

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