Superfluid-insulator transition in disordered boson systems |
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Authors: | Nandini Trivedi Salman Ullah |
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Affiliation: | (1) Materials Science Division, Bldg. 223, Argonne National Laboratory, 9700 S. Cass Avenue, 60439 Argonne, IL;(2) James Franck Institute, 5640 S. Ellis Avenue, 60637 Chicago, IL |
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Abstract: | We review the localization problem in two dimensions for interacting bosons in a random potential. This problem is intimately related to the study of
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He adsorbed in porous media, Josephson junction arrays, disordered superconducting films and vortex glasses. Using path integral Monte Carlo techniques, we find a superfluid, a localized or Bose glass insulator with gapless excitations, and (at commensurate densities) a Mott insulator with a finite gap to excitations. |
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