Disordered Supersolids in the Extended Bose-Hubbard Model
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.
Cite
@article{arxiv.1510.00291,
title = {Disordered Supersolids in the Extended Bose-Hubbard Model},
author = {Fei Lin and T. A. Maier and V. W. Scarola},
journal= {arXiv preprint arXiv:1510.00291},
year = {2017}
}