Publication: Superglass Phase of Interacting Bosons

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Title Superglass Phase of Interacting Bosons
Authors/Editors* Ka-Ming Tam, Scott Geraedts, Stephen Inglis, Michel J. P. Gingras, Roger Melko
Where published* Physical Review Letters
How published* Journal
Year* 2010
Volume 104
Pages 215301
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.
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