The Bose-Hubbard model on a triangular lattice with diamond ring-exchange
Strongly Correlated Electrons
2016-10-31 v2
Abstract
Ring-exchange interactions have been proposed as a possible mechanism for a Bose-liquid phase at zero temperature, a phase that is compressible with no superfluidity. Using the Stochastic Green Function algorithm (SGF), we study the effect of these interactions for bosons on a two-dimensional triangular lattice. We show that the supersolid phase, that is known to exist in the ground state for a wide range of densities, is rapidly destroyed as the ring-exchange interactions are turned on. We establish the ground-state phase diagram of the system, which is characterized by the absence of the expected Bose-liquid phase.
Cite
@article{arxiv.1607.04189,
title = {The Bose-Hubbard model on a triangular lattice with diamond ring-exchange},
author = {V. G. Rousseau and K. Hettiarachchilage and K. -M. Tam and M. Jarrell and J. Moreno},
journal= {arXiv preprint arXiv:1607.04189},
year = {2016}
}
Comments
6 pages, 10 figures