| Collapse–revival of squeezing of two atoms in dissipative cavities |
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| 引用本文： | 邹红梅,方卯发.Collapse–revival of squeezing of two atoms in dissipative cavities[J].中国物理 B,2016,25(7):70305-070305. |
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| 作者姓名： | 邹红梅 方卯发 |
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| 作者单位： | Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, College of Physics and Information Science, Hunan Normal University, Changsha 410081, China |
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| 基金项目： | Project supported by the Science and Technology Plan of Hunan Province, China (Grant No. 2010FJ3148), the National Natural Science Foundation of China (Grant No. 11374096), and the Doctoral Science Foundation of Hunan Normal University, China. |
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| 摘 要： | Based on the time-convolutionless master-equation approach, we investigate the squeezing dynamics of two atoms in dissipative cavities. We find that the atomic squeezing is related to initial atomic states, atom–cavity couplings, nonMarkovian effects and resonant frequencies of an atom and its cavity. The results show that a collapse–revival phenomenon will occur in the atomic squeezing and this process is accompanied by the buildup and decay of entanglement between two atoms. Enhancing the atom–cavity coupling can increase the frequency of the collapse–revival of the atomic squeezing.The stronger the non-Markovian effect is, the more obvious the collapse–revival phenomenon is. In particular, if the atom–cavity coupling or the non-Markovian effect is very strong, the atomic squeezing will tend to a stably periodic oscillation in a long time. The oscillatory frequency of the atomic squeezing is dependent on the resonant frequency of the atom and its cavity.
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| 收稿时间： | 2016-02-26 |
Collapse-revival of squeezing of two atoms in dissipative cavities |
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| Affiliation: | Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, College of Physics and Information Science, Hunan Normal University, Changsha 410081, China |
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| Abstract: | Based on the time-convolutionless master-equation approach, we investigate the squeezing dynamics of two atoms in dissipative cavities. We find that the atomic squeezing is related to initial atomic states, atom-cavity couplings, non-Markovian effects and resonant frequencies of an atom and its cavity. The results show that a collapse-revival phenomenon will occur in the atomic squeezing and this process is accompanied by the buildup and decay of entanglement between two atoms. Enhancing the atom-cavity coupling can increase the frequency of the collapse-revival of the atomic squeezing. The stronger the non-Markovian effect is, the more obvious the collapse-revival phenomenon is. In particular, if the atom-cavity coupling or the non-Markovian effect is very strong, the atomic squeezing will tend to a stably periodic oscillation in a long time. The oscillatory frequency of the atomic squeezing is dependent on the resonant frequency of the atom and its cavity. |
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| Keywords: | collapse-revival atomic squeezing atom-cavity coupling non-Markovian effect |
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