A Superglass Phase of Interacting Bosons
Disordered Systems and Neural Networks
2010-06-07 v2
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.
Keywords
Cite
@article{arxiv.0909.1845,
title = {A Superglass Phase of Interacting Bosons},
author = {Ka-Ming Tam and Scott Geraedts and Stephen Inglis and Michel J. P. Gingras and Roger G. Melko},
journal= {arXiv preprint arXiv:0909.1845},
year = {2010}
}
Comments
4 pages 3 figures: to appear in Phys. Rev. Lett.