Publication: Vortex-Peierls States in Optical Lattices
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Date
2006
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American Physical Society (APS)
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Burkov, A. A., and Eugene Demler. 2006. “Vortex-Peierls States in Optical Lattices.” Physical Review Letters 96 (18) (May 10). doi:10.1103/physrevlett.96.180406.
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Abstract
We show that vortices, induced in cold atom superfluids in optical lattices, may order in a novel vortexPeierls ground state. In such a state vortices do not form a simple lattice but arrange themselves in clusters, within which the vortices are partially delocalized, tunneling between classically degenerate configurations. We demonstrate that this exotic quantum many-body state is selected by an order-from-disorder mechanism for a special combination of the vortex filling and lattice geometry that has a macroscopic number of classically degenerate ground states.
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