Entanglement and non-Markovianity of a multi-level atom decaying in a cavity

doi:10.1088/1674-1056/25/1/010303

中国物理B ›› 2016, Vol. 25 ›› Issue (1): 10303-010303.doi: 10.1088/1674-1056/25/1/010303

Entanglement and non-Markovianity of a multi-level atom decaying in a cavity

Zi-Long Fan(范子龙), Yu-Kun Ren(任玉坤), Hao-Sheng Zeng(曾浩生)

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

收稿日期:2015-07-23 修回日期:2015-09-16 出版日期:2016-01-05 发布日期:2016-01-05
通讯作者: Hao-Sheng Zeng E-mail:hszeng@hunnu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11275064 and 11075050), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20124306110003), and the Construct Program of the National Key Discipline, China.

Entanglement and non-Markovianity of a multi-level atom decaying in a cavity

Zi-Long Fan(范子龙), Yu-Kun Ren(任玉坤), Hao-Sheng Zeng(曾浩生)

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

Received:2015-07-23 Revised:2015-09-16 Online:2016-01-05 Published:2016-01-05
Contact: Hao-Sheng Zeng E-mail:hszeng@hunnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11275064 and 11075050), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20124306110003), and the Construct Program of the National Key Discipline, China.

摘要/Abstract

摘要： We present a paradigmatic method for exactly studying non-Markovian dynamics of a multi-level V-type atom interacting with a zero-temperature bosonic bath. Special attention is paid to the entanglement evolution and the dynamical non-Markovianity of a three-level V-type atom. We find that the entanglement negativity decays faster and non-Markovianity is smaller in the resonance regions than those in the non-resonance regions. More importantly, the quantum interference between the dynamical non-Markovianities induced by different transition channels is manifested, and the frequency domains for constructive and destructive interferences are found.

关键词: entanglement negativity, non-Markovianity, quantum interference

Abstract: We present a paradigmatic method for exactly studying non-Markovian dynamics of a multi-level V-type atom interacting with a zero-temperature bosonic bath. Special attention is paid to the entanglement evolution and the dynamical non-Markovianity of a three-level V-type atom. We find that the entanglement negativity decays faster and non-Markovianity is smaller in the resonance regions than those in the non-resonance regions. More importantly, the quantum interference between the dynamical non-Markovianities induced by different transition channels is manifested, and the frequency domains for constructive and destructive interferences are found.

Key words: entanglement negativity, non-Markovianity, quantum interference

中图分类号: (Foundations of quantum mechanics; measurement theory)

03.65.Ta

03.65.Yz (Decoherence; open systems; quantum statistical methods) 42.50.Lc (Quantum fluctuations, quantum noise, and quantum jumps)

范子龙, 任玉坤, 曾浩生. Entanglement and non-Markovianity of a multi-level atom decaying in a cavity[J]. 中国物理B, 2016, 25(1): 10303-010303.

Zi-Long Fan(范子龙), Yu-Kun Ren(任玉坤), Hao-Sheng Zeng(曾浩生). Entanglement and non-Markovianity of a multi-level atom decaying in a cavity[J]. Chin. Phys. B, 2016, 25(1): 10303-010303.

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Entanglement and non-Markovianity of a multi-level atom decaying in a cavity

Entanglement and non-Markovianity of a multi-level atom decaying in a cavity

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