| 双组分玻色-爱因斯坦凝聚体中亚稳态存在条件及其寿命 |
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| 引用本文： | 赵华,梁九卿.双组分玻色-爱因斯坦凝聚体中亚稳态存在条件及其寿命[J].低温物理学报,2004,26(2):131-134. |
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| 作者姓名： | 赵华 梁九卿 |
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| 作者单位： | 山西大学理论物理研究所,太原,030006;山西大学理论物理研究所,太原,030006 |
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| 摘 要： | 本文对双势阱中凝聚的冷原子通过约瑟夫森结隧穿时所形成的亚稳态进行研究.通过介观自旋算符建立了体系的精确量子相位模型,利用对量子自旋的势场描述给出了在两阱中振荡的原子之间相位差为时,即亚稳态时所要满足的物理条件,并用瞬子方法计算了该亚稳态存在的寿命.
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| 关 键 词： | 精确量子相位模型 瞬子方法 亚稳态 |
| 修稿时间： | 2003年10月13 |
THE LIFETIME OF METASTATE IN BOSE-EINSTEIN CONDENSATES |
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| ZHAO HUA LIANG JIU-QING Institute of Theoretical Physics,Shanxi University,Taiyuan,Shanxi.THE LIFETIME OF METASTATE IN BOSE-EINSTEIN CONDENSATES[J].Chinese Journal of Low Temperature Physics,2004,26(2):131-134. |
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| Authors: | ZHAO HUA LIANG JIU-QING Institute of Theoretical Physics Shanxi University Taiyuan Shanxi |
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| Affiliation: | ZHAO HUA LIANG JIU-QING Institute of Theoretical Physics,Shanxi University,Taiyuan,Shanxi 030006 |
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| Abstract: | The exact quantum phase model is derived with the help of a mesoscopic spin modeled from weakly linked two-component Bose-Einstein Condensates. It is shown that the metastate exist only in some parameter region. The decay of the metastable-state via quantum tunneling is studied and the life time is found analytically by instanton method. |
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| Keywords: | exact quantum phase model instanton method metastable -state |
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