Extended Bose-Hubbard model with pair hopping on triangular lattice

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 zero-temperature phase diagram and a variety of quantum phase transit...

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Bibliographic Details
Published in:Chinese physics B 2013-09, Vol.22 (9), p.539-546
Main Author: 王艳成 张万舟 邵慧 郭文安
Format: Article
Language:English
Subjects:
Hubbard模型
Lattices
Phase diagrams
Phase transformations
Stability
三角晶格
固体相
玻色
相图
稳定性
跳频
量子
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Summary: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 zero-temperature phase diagram and a variety of quantum phase transitions are investigated in great detail. In particular, we show the existence and the stability of the pair supersolid phase.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/22/9/096702