Extended Bose–Hubbard model with pair hopping on triangular lattice

doi:10.1088/1674-1056/22/9/096702

中国物理B ›› 2013, Vol. 22 ›› Issue (9): 96702-096702.doi: 10.1088/1674-1056/22/9/096702

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇下一篇

Extended Bose–Hubbard model with pair hopping on triangular lattice

王艳成^a, 张万舟^b, 邵慧^a, 郭文安^a

a Physics Department, Beijing Normal University, Beijing 100875, China;
b College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China

收稿日期:2013-04-07 修回日期:2013-04-22 出版日期:2013-07-26 发布日期:2013-07-26
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11175018 and 11247251).

Extended Bose–Hubbard model with pair hopping on triangular lattice

Wang Yan-Cheng (王艳成)^a, Zhang Wan-Zhou (张万舟)^b, Shao Hui (邵慧)^a, Guo Wen-An (郭文安)^a

a Physics Department, Beijing Normal University, Beijing 100875, China;
b College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China

Received:2013-04-07 Revised:2013-04-22 Online:2013-07-26 Published:2013-07-26
Contact: Guo Wen-An E-mail:waguo@bnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11175018 and 11247251).

摘要/Abstract

摘要： 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.

关键词: extended Bose-Hubbard model, pair hopping, zero-temperature phase diagram, pair supersolid

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.

Key words: extended Bose-Hubbard model, pair hopping, zero-temperature phase diagram, pair supersolid

中图分类号: (Bose-Einstein condensates in optical potentials)

67.85.Hj

67.80.kb (Supersolid phases on lattices)

王艳成, 张万舟, 邵慧, 郭文安. Extended Bose–Hubbard model with pair hopping on triangular lattice[J]. 中国物理B, 2013, 22(9): 96702-096702.

Wang Yan-Cheng (王艳成), Zhang Wan-Zhou (张万舟), Shao Hui (邵慧), Guo Wen-An (郭文安). Extended Bose–Hubbard model with pair hopping on triangular lattice[J]. Chin. Phys. B, 2013, 22(9): 96702-096702.

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Extended Bose–Hubbard model with pair hopping on triangular lattice

Extended Bose–Hubbard model with pair hopping on triangular lattice

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