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arXiv · 0909.1845

A Superglass Phase of Interacting Bosons

Ka-Ming Tam·Scott Geraedts·Stephen Inglis·Michel J. P. Gingras·Roger G. Melko
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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.

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Ka-Ming Tam, Scott Geraedts, Stephen Inglis, Michel J. P. Gingras, Roger G. Melko. 2009-09-09. A Superglass Phase of Interacting Bosons. https://doi.org/10.1103/physrevlett.104.215301

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