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Extended Bose-Hubbard model with pair hopping on the 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 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.

preprint2013arXivOpen access
Yancheng WangWanzhou ZhangHui ShaoWenan Guo
cond-mat.quant-gas
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Open access4 authors1 topic
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Yancheng WangWanzhou ZhangHui ShaoWenan Guo

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