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Phys. Rev. Lett. 96, 180406 (2006) [4 pages]Vortex-Peierls States in Optical Lattices
Received 14 February 2006; published 10 May 2006
We show that vortices, induced in cold atom superfluids in optical lattices, may order in a novel vortex-Peierls 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. ©2006 The American Physical Society
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B. Paredes et al., ibid. 87, 010402 (2001); J. Sinova et al., ibid. 89, 030403 (2002). H. Pu et al., ibid. 94, 190401 (2005); R. Bhat et al., Phys. Rev. Lett. 96, 060405 (2006). CITING ARTICLESFor access to citing articles, you need to log in.
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