title: Superfluid-insulator transition in a commensurate one-dimensional bosonic system with off-diagonal disorder.
abstract: We study the nature of the superfluid-insulator quantum phase transition in a one-dimensional system of lattice bosons with off-diagonal disorder in the limit of a large integer filling factor. Monte Carlo simulations of two strongly disordered models show that the universality class of the transition in question is the same as that of the superfluid-Mott-insulator transition in a pure system. This result can be explained by disorder self-averaging in the superfluid phase and the applicability of the standard quantum hydrodynamic action. We also formulate the necessary conditions which should be satisfied by the stong-randomness universality class, if one exists.
authors.affiliation: Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003, USA.
authors.forename: Karén G
authors.initials: KG
authors.lastname: Balabanyan
authors.forename: Nikolay
authors.initials: N
authors.lastname: Prokof'ev
authors.forename: Boris
authors.initials: B
authors.lastname: Svistunov