Extended Bose-Hubbard model with pair hopping on the triangular lattice
Yancheng Wang, Wanzhou Zhang, Hui Shao, and Wenan Guo
TL;DR
This paper investigates an extended Bose-Hubbard model on a triangular lattice, revealing the existence and stability of a pair supersolid phase through mean-field analysis with pair hopping and three-body constraints.
Contribution
It introduces a comprehensive mean-field study of pair hopping in the extended Bose-Hubbard model, highlighting the stability of the pair supersolid phase.
Findings
Identification of the pair supersolid phase
Detailed phase diagram with quantum phase transitions
Validation of the model's stability under various conditions
Abstract
We study systematically an extended Bose-Hubbard model on the triangular lattice by means of a meanfield method based on the Gutzwiller ansatz. Pair hopping terms are explicitly included and a three-body constraint is applied. The ground-state phase diagram and a variety of quantum phase transitions are investigated in great detail. In particular, we show the existence and stability of the pair supersolid phase.
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