The squeezing dynamics of two independent atoms by detuning in two non-Markovian environments

doi:10.1088/1674-1056/22/12/120303

中国物理B ›› 2013, Vol. 22 ›› Issue (12): 120303-120303.doi: 10.1088/1674-1056/22/12/120303

The squeezing dynamics of two independent atoms by detuning in two non-Markovian environments

邹红梅, 方卯发, 杨百元

Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control, Ministry of Education, and Department of Physics, Hunan Normal University, Changsha 410081, China

收稿日期:2013-04-11 修回日期:2013-05-10 出版日期:2013-10-25 发布日期:2013-10-25
基金资助:
Project supported by the Natural Science Foundation of Hunan Province, China (Grant No. 09JJ5001), the Science and Technology Plan of Hunan Province, China (Grant No. 2010FJ3148), and the National Natural Science Foundation of China (Grant No. 10374025).

The squeezing dynamics of two independent atoms by detuning in two non-Markovian environments

Zou Hong-Mei (邹红梅), Fang Mao-Fa (方卯发), Yang Bai-Yuan (杨百元)

Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control, Ministry of Education, and Department of Physics, Hunan Normal University, Changsha 410081, China

Received:2013-04-11 Revised:2013-05-10 Online:2013-10-25 Published:2013-10-25
Contact: Fang Mao-Fa E-mail:mffang@hunnu.edu.cn
Supported by:
Project supported by the Natural Science Foundation of Hunan Province, China (Grant No. 09JJ5001), the Science and Technology Plan of Hunan Province, China (Grant No. 2010FJ3148), and the National Natural Science Foundation of China (Grant No. 10374025).

摘要/Abstract

摘要： The squeezing dynamics of two independent two-level atoms off-resonantly coupled to two non-Markovian reservoirs is studied by the time-convolutionless master-equation approach. We find that the squeezing of two atoms is dependent on both detuning and the non-Markovian effect. Our results show that, in the non-Markovian regime, the bigger the detuning and the stronger the non-Markovian effect are, the larger the strength of the squeezing is. And the squeezing of two atoms can be effectively protected for a long time when both the non-Markovian effect and detuning are present simultaneously. The physical mechanism is that the detuning not only can promote the feedback of information from the environment into the atomic system but also can greatly suppress the atomic decay in the non-Markovian regime.

关键词: non-Markovian effect, detuning, squeezing, two-level atom

Abstract: The squeezing dynamics of two independent two-level atoms off-resonantly coupled to two non-Markovian reservoirs is studied by the time-convolutionless master-equation approach. We find that the squeezing of two atoms is dependent on both detuning and the non-Markovian effect. Our results show that, in the non-Markovian regime, the bigger the detuning and the stronger the non-Markovian effect are, the larger the strength of the squeezing is. And the squeezing of two atoms can be effectively protected for a long time when both the non-Markovian effect and detuning are present simultaneously. The physical mechanism is that the detuning not only can promote the feedback of information from the environment into the atomic system but also can greatly suppress the atomic decay in the non-Markovian regime.

Key words: non-Markovian effect, detuning, squeezing, two-level atom

中图分类号: (Quantum information)

03.67.-a

03.65.Yz (Decoherence; open systems; quantum statistical methods)

邹红梅, 方卯发, 杨百元. The squeezing dynamics of two independent atoms by detuning in two non-Markovian environments[J]. 中国物理B, 2013, 22(12): 120303-120303.

Zou Hong-Mei (邹红梅), Fang Mao-Fa (方卯发), Yang Bai-Yuan (杨百元). The squeezing dynamics of two independent atoms by detuning in two non-Markovian environments[J]. Chin. Phys. B, 2013, 22(12): 120303-120303.

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The squeezing dynamics of two independent atoms by detuning in two non-Markovian environments

The squeezing dynamics of two independent atoms by detuning in two non-Markovian environments

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