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. © 2010 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Tam, K., Geraedts, S., Inglis, S., Gingras, M., & Melko, R. (2010). Superglass phase of interacting bosons. Physical Review Letters, 104 (21) https://doi.org/10.1103/PhysRevLett.104.215301