| Mott-Hubbard transition of bosons in optical lattices with two-body interactions |
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| 作者姓名： | 燕花花 马青山 张军 |
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| 作者单位： | 1. College of Physics Science and Technology, Xinjiang University, Urumqi 830046, China;;2. Department of Physics, Xi'an Jiaotong University, Xi'an 710049, China |
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| 摘 要： | In this paper, based on the Bose-Hubbard model with two-body on-site interactions, we study the quantum phase transition between the superfluid state and the Mott-insulator state. With the decoupling approximation, we get the relation between the weak superfluidity and dimensionless chemical potential with different particle number and different dimensionless interaction strength, and the relation between the weak superfluidity and the reciprocal of dimensionless interaction strength with different particle number. We also calculate the corresponding experimental parameters.
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| 关 键 词： | 相互作用 玻色子 光晶格 Hubbard模型 流体状态 无量纲 Bose 实验参数 |
| 收稿时间： | 2010-9-16 |
| 修稿时间： | 2010-10-24 |
Mott-Hubbard transition of bosons in optical lattices with two-body interactions |
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| YAN Hua-Hua,MA Qing-Shan,ZHANG Jun.Mott-Hubbard transition of bosons in optical lattices with two-body interactions[J].High Energy Physics and Nuclear Physics,2011,35(6):530-534. |
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| Authors: | YAN Hua-Hua MA Qing-Shan ZHANG Jun |
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| Institution: | 1 College of Physics Science and Technology, Xinjiang University, Urumqi 830046, China 2 Department of Physics, Xi’an Jiaotong University, Xi’an 710049, China) |
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| Abstract: | In this paper, based on the Bose-Hubbard model with two-body on-site interactions, we study the quantum phase transition between the superfluid state and the Mott-insulator state. With the decoupling approximation, we get the relation between the weak superfluidity and dimensionless chemical potential with different particle number and different dimensionless interaction strength, and the relation between the weak superfluidity and the reciprocal of dimensionless interaction strength with different particle... |
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| Keywords: | Bose |
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