Collapse-revival of squeezing of two atoms in dissipative cavities

doi:10.1088/1674-1056/25/7/070305

中国物理B ›› 2016, Vol. 25 ›› Issue (7): 70305-070305.doi: 10.1088/1674-1056/25/7/070305

Collapse-revival of squeezing of two atoms in dissipative cavities

Hong-Mei Zou(邹红梅), Mao-Fa Fang(方卯发)

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

收稿日期:2016-02-26 修回日期:2016-03-21 出版日期:2016-07-05 发布日期:2016-07-05
通讯作者: Hong-Mei Zou E-mail:zhmzc1997@126.com
基金资助:
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.

Collapse-revival of squeezing of two atoms in dissipative cavities

Hong-Mei Zou(邹红梅), Mao-Fa Fang(方卯发)

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

Received:2016-02-26 Revised:2016-03-21 Online:2016-07-05 Published:2016-07-05
Contact: Hong-Mei Zou E-mail:zhmzc1997@126.com
Supported by:
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.

摘要/Abstract

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, 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.

关键词: collapse-revival, atomic squeezing, atom-cavity coupling, non-Markovian effect

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.

Key words: collapse-revival, atomic squeezing, atom-cavity coupling, non-Markovian effect

中图分类号: (Decoherence; open systems; quantum statistical methods)

03.65.Yz

03.67.-a (Quantum information) 42.50.Lc (Quantum fluctuations, quantum noise, and quantum jumps) 42.50.Pq (Cavity quantum electrodynamics; micromasers)

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.

Hong-Mei Zou(邹红梅), Mao-Fa Fang(方卯发). Collapse-revival of squeezing of two atoms in dissipative cavities[J]. Chin. Phys. B, 2016, 25(7): 70305-070305.

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Collapse-revival of squeezing of two atoms in dissipative cavities

Collapse-revival of squeezing of two atoms in dissipative cavities

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