Pinning of vortices in a Bose-Einstein condensate by an optical lattice
arXiv:cond-mat/0401583 · doi:10.1103/PhysRevLett.93.060401
Abstract
We consider the ground state of vortices in a Bose-Einstein condensate. We show that turning on a weak optical periodic potential leads to a transition from the triangular Abrikosov vortex lattice to phases where the vortices are pinned by the optical potential. We discuss the phase diagram of the system for a two-dimensional optical periodic potential with one vortex per optical lattice cell. We also discuss the influence of a one-dimensional optical periodic potential on the vortex ground state. The latter situation has no analogue in other condensed-matter systems.
4 pages, 2 figures, minor changes, typos corrected, references added
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