中国物理B ›› 2018, Vol. 27 ›› Issue (1): 10304-010304.doi: 10.1088/1674-1056/27/1/010304

• GENERAL • 上一篇    下一篇

Quantum coherence and non-Markovianity of an atom in a dissipative cavity under weak measurement

Yu Liu(刘禹), Hong-Mei Zou(邹红梅), Mao-Fa Fang(方卯发)   

  1. 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:2017-08-15 修回日期:2017-09-25 出版日期:2018-01-05 发布日期:2018-01-05
  • 通讯作者: Hong-Mei Zou E-mail:zhmzc1997@126.com
  • 基金资助:
    Project supported by the Scientific Research Project of Hunan Provincial Education Department, China (Grant No. 16C0949), the Hunan Provincial Innovation Foundation for Postgraduate, China (Grant No. CX2017B177), the National Natural Science Foundation of China (Grant No. 11374096), and the Doctoral Science Foundation of Hunan Normal University, China.

Quantum coherence and non-Markovianity of an atom in a dissipative cavity under weak measurement

Yu Liu(刘禹), Hong-Mei Zou(邹红梅), Mao-Fa Fang(方卯发)   

  1. 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:2017-08-15 Revised:2017-09-25 Online:2018-01-05 Published:2018-01-05
  • Contact: Hong-Mei Zou E-mail:zhmzc1997@126.com
  • Supported by:
    Project supported by the Scientific Research Project of Hunan Provincial Education Department, China (Grant No. 16C0949), the Hunan Provincial Innovation Foundation for Postgraduate, China (Grant No. CX2017B177), 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： Quantum coherence and non-Markovianity of an atom in a dissipative cavity under weak measurement are investigated in this work. We find that:the quantum coherence obviously depends on the initial atomic state, the strength of the weak measurement and its reversal, the atom-cavity coupling constant and the non-Markovian effect. It is obvious that the weak measurement effect protects the coherence better. The quantum coherence is preserved more efficiently for larger atom-cavity coupling. The stronger the non-Markovian effect is, the more slowly the coherence reduces. The quantum coherence can be effectively protected by means of controlling these physical parameters.

关键词: quantum coherence, non-Markovianty, dissipative cavity

Abstract: Quantum coherence and non-Markovianity of an atom in a dissipative cavity under weak measurement are investigated in this work. We find that:the quantum coherence obviously depends on the initial atomic state, the strength of the weak measurement and its reversal, the atom-cavity coupling constant and the non-Markovian effect. It is obvious that the weak measurement effect protects the coherence better. The quantum coherence is preserved more efficiently for larger atom-cavity coupling. The stronger the non-Markovian effect is, the more slowly the coherence reduces. The quantum coherence can be effectively protected by means of controlling these physical parameters.

Key words: quantum coherence, non-Markovianty, dissipative cavity

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

  • 03.65.Yz
34.80.Qb (Laser-modified scattering) 42.25.Kb (Coherence) 03.65.Ta (Foundations of quantum mechanics; measurement theory)