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

doi:10.1088/1674-1056/27/1/010304

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.

Keywords: quantum coherence non-Markovianty dissipative cavity

Received: 15 August 2017
Revised: 25 September 2017
Accepted manuscript online:

PACS:	03.65.Yz	(Decoherence; open systems; quantum statistical methods)
	34.80.Qb	(Laser-modified scattering)
	42.25.Kb	(Coherence)
	03.65.Ta	(Foundations of quantum mechanics; measurement theory)

Fund: 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.

Corresponding Authors: Hong-Mei Zou
E-mail: zhmzc1997@126.com

Cite this article:

Yu Liu(刘禹), Hong-Mei Zou(邹红梅), Mao-Fa Fang(方卯发) Quantum coherence and non-Markovianity of an atom in a dissipative cavity under weak measurement 2018 Chin. Phys. B 27 010304

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

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