| The pairing correlations in the phased t－U Hubbard model |
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| 引用本文： | 刘自信,刘平,刘亚,文生辉.The pairing correlations in the phased t－U Hubbard model[J].中国物理 B,2004,13(2):229-233. |
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| 作者姓名： | 刘自信 刘平 刘亚 文生辉 |
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| 作者单位： | Department of Physics, Henan Normal University, Xinxiang 453002, China |
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| 基金项目： | Project supported by the Natural Science Foundation of Henan Province and the National Natural Science Foundation of China (Grant Nos 60276004 and 60290083). |
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| 摘 要： | In this paper we have studied the phased t－U Hubbard model. Using the constrained path Monte Carlo method, we investigated the effects of phase factor on pairing correlation functions in the ground state, and we found that the long-range correlations are dependent on the choice of phase factor, and for some special values of phase factor there exist long-range pairing correlations only in the strong coupling region.
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| 关 键 词： | 配对相关性 Hubbard模式 相关函数 基态 高温超导物理 蒙特卡罗理论 哈密顿相 |
| 收稿时间： | 2003-06-27 |
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