Extended Bose-Hubbard model with pair hopping on triangular lattice |
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| Authors: | Wang Yan-Cheng Zhang Wan-Zhou Shao Hui and Guo Wen-An |
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| Institution: | [1]Physics Department, Beijing Normal University, Beijing 100875, China [2]College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China |
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| 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 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. |
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| Keywords: | extended Bose-Hubbard model pair hopping zero-temperature phase diagram pair supersolid |
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