| 周期脉冲撞击的两分量Bose-Einstein凝聚系统的单粒子相干和对纠缠 |
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| 引用本文： | 严冬,宋立军.周期脉冲撞击的两分量Bose-Einstein凝聚系统的单粒子相干和对纠缠[J].海洋学报,2010,32(10):6832-6836. |
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| 作者姓名： | 严冬 宋立军 |
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| 作者单位： | 长春大学理学院,长春 130022; 吉林大学物理学院,长春 130022;长春大学理学院,长春 130022 |
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| 基金项目： | 国家自然科学基金(批准号:10947019)和吉林省教育厅(批准号:2008191, 2009237)资助的课题. |
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| 摘 要： | 在周期脉冲撞击的两分量Bose-Einstein凝聚系统中,研究了量子混沌对单粒子相干和对纠缠性质的影响.研究表明,混沌促使单粒子相干发生强烈衰减并保持着较低的相干度,同时对纠缠出现最大值并在较短时间后消失.利用单粒子相干的这种性质可以直接测量量子混沌存在的相空间结构,有利于预防Bose-Einstein凝聚的瓦解和控制凝聚体的混沌行为.
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| 关 键 词： | Bose-Einstein凝聚 单粒子相干 对纠缠 混沌 |
Single-particle coherence and pairwise entanglement in a two-component Bose-Einstein condensate impacted by the periodic impulses |
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| Yan Dong and Song Li-Jun.Single-particle coherence and pairwise entanglement in a two-component Bose-Einstein condensate impacted by the periodic impulses[J].Acta Oceanologica Sinica (in Chinese),2010,32(10):6832-6836. |
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| Authors: | Yan Dong and Song Li-Jun |
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| Institution: | School of Science, Changchun University, Changchun 130022, China; College of Physics, Jilin University, Changchun 130022, China;School of Science, Changchun University, Changchun 130022, China |
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| Abstract: | The influence of the quantum chaos on the single-particle coherence and the pairwise entanglement is investigated in a two-component Bose-Einstein condensate impacted by periodic impulses. The results reveal that the single-particle coherence decays strongly when driven by chaos and keeps a lower degree of coherence. Simultaneously, there apears the maximal pairwise entanglement and it disappears after a short time. By using the properties of the single-particle coherence, we can measure directly the structure of the phase space in which the chaos exists, and this contributes to prevent the collapse of a Bose-Einstein condensate and control the chaotic behavior. |
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| Keywords: | Bose-Einstein condensate single particle coherence pairwise entanglement chaos |
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