| Josephson Dynamics of a Bose-Einstein Condensate Trapped in a Double-Well Potential |
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| 引用本文： | 杨宏伟 左维. Josephson Dynamics of a Bose-Einstein Condensate Trapped in a Double-Well Potential[J]. 中国物理快报, 2007, 24(3): 620-623 |
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| 作者姓名： | 杨宏伟 左维 |
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| 作者单位： | [1]Institute of Modern Physics, Chinese Academy of Sciences, PO Box 31, Lanzhou 730000 [2]Graduate School, Chinese Academy of Sciences, Beijing 100049 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 10575119 and 10235030, the Knowledge hmovation Project of Chinese Academy of Sciences under Grant No KJCX-SYW-N2, and the National Basic Research Programme of China under Grant No 2002CAB00200. |
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| 摘 要： | The Josephson equations for a Bose Einstein Condensate gas trapped in a double-well potential are derived with the two-mode approximation by the Gross Pitaevskii equation. The dynamical characteristics of the equations are obtained by the numerical phase diagrams. The nonlinear self-trapping effect appeared in the phase diagrams are emphatically discussed, and the condition EcN 〉 4E3 is presented.
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| 关 键 词： | 约瑟夫森效应 浓缩物 爱因斯坦 势论 |
| 收稿时间： | 2006-11-14 |
| 修稿时间： | 2006-11-14 |
Josephson Dynamics of a Bose--Einstein Condensate Trapped in a Double-Well Potential |
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| YANG Hong-Wei,ZUO Wei. Josephson Dynamics of a Bose--Einstein Condensate Trapped in a Double-Well Potential[J]. Chinese Physics Letters, 2007, 24(3): 620-623 |
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| Authors: | YANG Hong-Wei ZUO Wei |
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| Affiliation: | 1.Institute of Modern Physics, Chinese Academy of Sciences, PO Box 31, Lanzhou 730000 ; 2 Graduate School, Chinese Academy of Sciences, Beijing 100049 |
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| Abstract: | The Josephson equations for a Bose--Einstein Condensate gas trapped in adouble-well potential are derived with the two-mode approximation by theGross--Pitaevskii equation. The dynamical characteristics of the equations are obtained by the numerical phase diagrams. The nonlinear self-trapping effect appeared in the phase diagrams are emphatically discussed, and the condition EcN>4EJ is presented. |
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| Keywords: | 03.75.Lm 03.65.Ge |
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