Structural phase transitions of vortex matter in an optical lattice.
We consider the vortex structure of a rapidly rotating trapped atomic Bose-Einstein condensate in the presence of a corotating periodic optical lattice potential. We observe a rich variety of structural phases which reflect the interplay of the vortex-vortex and vortex-lattice interactions. The lattice structure is very sensitive to the ratio of vortices to pinning sites and we observe structural phase transitions and domain formation as this ratio is varied.
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Department of Physics and Astronomy, Rice University, Houston, Texas 77251-1892, USA.
Baksmaty
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Yi
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Bigelow
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