QMC study of the 1D boson Hubbard model with a superlattice potential

ORAL

Abstract

We use QMC simulations to explore the phase diagram of the Bose-Hubbard model with an additional superlattice potential. We first analyse the hard-core limit where an exact analytic treatment is possible, and then use QMC to solve the soft-core case and find the insulator/superfluid phase diagram as a function of potential strength and filling. These results are relevant to the behavior of cold atoms in optical superlattices which are beginning to be achieved experimentally.

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Authors

  • Valy Rousseau

  • Marcos Rigol

    • University of California, Davis

  • Fr\'{e}d\'{e}ric H\'{e}bert

    • Institut Non Lin\'{e}aire de Nice

  • Daniel Arovas

    • University of California, San Diego

  • George Batrouni

    • Institut Non Lin\'{e}aire de Nice

  • Richard Scalettar

    • University of California, Davis