Disordered Supersolids in the Extended Bose-Hubbard Model

Fei Lin; T. A. Maier; V. W. Scarola

doi:10.1038/s41598-017-13040-9

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arXiv · 1510.00291

Disordered Supersolids in the Extended Bose-Hubbard Model

Fei Lin·T. A. Maier·V. W. Scarola

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Abstract

The extended Bose-Hubbard model captures the essential properties of a wide variety of physical systems including ultracold atoms and molecules in optical lattices, Josephson junction arrays, and certain narrow band superconductors. It exhibits a rich phase diagram including a supersolid phase where a lattice solid coexists with a superfluid. We use quantum Monte Carlo to study the supersolid part of the phase diagram of the extended Bose-Hubbard model on the simple cubic lattice. We add disorder to the extended Bose-Hubbard model and find that the maximum critical temperature for the supersolid phase tends to be suppressed by disorder. But we also find a narrow parameter window in which the supersolid critical temperature is enhanced by disorder. Our results show that supersolids survive a moderate amount of spatial disorder and thermal fluctuations in the simple cubic lattice.

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Fei Lin, T. A. Maier, V. W. Scarola. 2015-10-01. Disordered Supersolids in the Extended Bose-Hubbard Model. https://doi.org/10.1038/s41598-017-13040-9

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