Superfluid-insulator transition in disordered boson systems

Werner Krauth, Nandini Trivedi, David Ceperley

Research output: Contribution to journalArticle

Abstract

We present results of path-integral Monte Carlo simulations of bosons on a two-dimensional square lattice in a random potential of average strength V and with on-site repulsion U. We find that the superfluid density ps is enhanced by increasing V and U in certain regions of parameter space. By combining the results of ps with the behavior of the density-density correlation function on lattices of size up to 10×10, we study the superfluid-to-Mott-insulator transition and the transition from a superfluid to a disorder-localized ("Bose-glass") phase.

Original languageEnglish (US)
Pages (from-to)2307-2310
Number of pages4
JournalPhysical review letters
Volume67
Issue number17
DOIs
StatePublished - Jan 1 1991

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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