| 场与约瑟夫森结耦合系统中的零点能和零点涨落 |
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| 引用本文： | 邵彬,邹健,李前树.场与约瑟夫森结耦合系统中的零点能和零点涨落[J].北京理工大学学报(英文版),2000,9(2):142-147. |
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| 作者姓名： | 邵彬 邹健 李前树 |
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| 作者单位： | 1. 北京理工大学,应用物理系,北京,100081
2. 北京理工大学,化工与材料学院,北京,100081 |
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| 基金项目： | 国家自然科学基金;29773005; |
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| 摘 要： | 研究介观约瑟夫森结与量子化电磁场相互作用系统.用幺正变换技术对耦合系统的哈密顿实施对角化,得到耦合系统的零点能和零点涨落,显示了场与约瑟夫森结子系统磁通和电荷的基态量子涨落特点.当耦合系统处于其最低能态(无辐射状态),场结子系统能够显示非经典行为.
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| 关 键 词： | 涨落 介观约瑟夫森结 压缩 |
| 收稿时间： | 1999/11/9 0:00:00 |
Zero-Point Energy and Fluctuation in a Field-Josephson Junction-Coupled System |
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| SHAO Bin,ZOU Jian and LI Qian-shu.Zero-Point Energy and Fluctuation in a Field-Josephson Junction-Coupled System[J].Journal of Beijing Institute of Technology,2000,9(2):142-147. |
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| Authors: | SHAO Bin ZOU Jian and LI Qian-shu |
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| Affiliation: | Department of Applied Physics, Beijing Institute of Technology, Beijing 100081;Department of Applied Physics, Beijing Institute of Technology, Beijing 100081;School of Chemical Engineering and Materials Science, Beijing Institute of Technology, Beijing 100081 |
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| Abstract: | To investigate the interaction of a mesoscopic Josephson junction with a single mode quantized electromagnetic field, the diagnonalizing process of the coupled system Hamiltonian was performed by using an unitary transformation. Zero- point energy and zero- point fluctuation of the coupled system were shown. For the ground state of the coupled system, the quantum fluctuations of the flux and charge operators in the field and junction subsystems can exhibit smaller quantum noise than the zero point fluctuations of the individual subsystems. Thus, when the coupled system is in its lowest energy state, which means that no radiation appear, the two subsystems exhibit nonclassical behavior. |
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| Keywords: | fluctuation mesoscopic Josephson junction squeezing |
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