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cond-mat.str-el2016★ 1 cited
The Bose-Hubbard model on a triangular lattice with diamond ring-exchange
V. G. Rousseau, K. Hettiarachchilage, K. -M. Tam +2
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 Sto…
cond-mat.str-el2003
Phase separation in the bosonic Hubbard model with ring exchange
V. Rousseau, G. G. Batrouni, R. T. Scalettar
We show that soft core bosons in two dimensions with a ring exchange term exhibit a tendency for phase separation. This observation suggests that the thermodynamic stability of nor…