The Bose-Hubbard model on a triangular lattice with diamond ring-exchange

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.

6 pages, 10 figures

References in corpus (6)

• Supersolid hardcore bosons on the triangular lattice
• Atomic quantum simulator for lattice gauge theories and ring exchange models
• The Stochastic Green Function (SGF) algorithm
• Directed update for the Stochastic Green Function algorithm
• Emergence of Artificial Photons in an Optical Lattice
• The Boson-Hubbard Model on a Kagome Lattice with Sextic Ring-Exchange Terms