| 玻色-爱因斯坦凝聚体系中的混沌隧穿行为 |
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| 引用本文： | 房永翠,杨志安. 玻色-爱因斯坦凝聚体系中的混沌隧穿行为[J]. 物理学报, 2008, 57(12): 7438-7446 |
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| 作者姓名： | 房永翠 杨志安 |
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| 作者单位： | 济南大学理学院,济南,250022 |
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| 基金项目： | 国家自然科学基金(批准号：10474008，10604009)资助的课题. |
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| 摘 要： | 研究了双势阱玻色-爱因斯坦凝聚(BEC)系统在外加周期调制下的混沌相变过程，着重讨论了混沌现象对BEC系统隧穿的影响.当外加调制频率与系统固有频率达到共振时，相平面会出现不稳定现象，即混沌现象.在量子情况下，研究了系统的Husimi函数随时间的演化.研究发现：当混沌现象出现时，系统中粒子间相互作用增大，使得混沌区域扩大，进而引起混沌辅助隧穿程度的变化.关键词：玻色-爱因斯坦凝聚混沌隧穿
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| 关 键 词： | 玻色-爱因斯坦凝聚 混沌 隧穿 |
| 收稿时间： | 2007-12-28 |
Chaos tunneling of Bose-Einstein condensates |
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| Fang Yong-Cui,Yang Zhi-An. Chaos tunneling of Bose-Einstein condensates[J]. Acta Physica Sinica, 2008, 57(12): 7438-7446 |
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| Authors: | Fang Yong-Cui Yang Zhi-An |
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| Abstract: | Phase transition to chaos of Bose-Einstein condensates in double-well trap with external periodic modulation is investigated in this paper. Particularly, chaos tunneling is studied. It is found that, when resonance between external periodic frequency and natural frequency is established, this system can turn to instability (chaos). The evolutions of Husimi function in quantum condition are discussed. It is found that, when chaos emerges, chaos region and chaos tunneling varies with the interaction between the particles. |
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| Keywords: | Bose-Einstein condensate chaos tunneling |
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