title: Superglass phase of interacting bosons.
abstract: We introduce a Bose-Hubbard Hamiltonian with random disordered interactions as a model to study the interplay of superfluidity and glassiness in a system of three-dimensional hard-core bosons at half-filling. Solving the model using large-scale quantum Monte Carlo simulations, we show that these disordered interactions promote a stable superglass phase, where superflow and glassy density localization coexist in equilibrium without exhibiting phase separation. The robustness of the superglass phase is underlined by its existence in a replica mean-field calculation on the infinite-dimensional Hamiltonian.
authors.affiliation: Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada.
authors.forename: Ka-Ming
authors.initials: KM
authors.lastname: Tam
authors.forename: Scott
authors.initials: S
authors.lastname: Geraedts
authors.forename: Stephen
authors.initials: S
authors.lastname: Inglis
authors.forename: Michel J P
authors.initials: MJ
authors.lastname: Gingras
authors.forename: Roger G
authors.initials: RG
authors.lastname: Melko