Protection of entanglement between two V-atoms in a multi-cavity coupling system

doi:10.1088/1674-1056/ac0bb2

中国物理B ›› 2022, Vol. 31 ›› Issue (1): 10301-010301.doi: 10.1088/1674-1056/ac0bb2

Protection of entanglement between two V-atoms in a multi-cavity coupling system

Wen-Jin Huang(黄文进)¹, Mao-Fa Fang(方卯发)^1,†, and Xiong Xu(许雄)²

1 Synergetic Innovation Center for Quantum Effects and Applications, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha 410081, China;
2 School of Physics and Electronics, Hunan Key Laboratory of Super Microstructure and Ultrafast Process, State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China

收稿日期:2021-03-03 修回日期:2021-06-07 接受日期:2021-06-16 出版日期:2021-12-03 发布日期:2021-12-23
通讯作者: Mao-Fa Fang E-mail:mffang@hunnu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 12064012 and 11374096).

Protection of entanglement between two V-atoms in a multi-cavity coupling system

Wen-Jin Huang(黄文进)¹, Mao-Fa Fang(方卯发)^1,†, and Xiong Xu(许雄)²

1 Synergetic Innovation Center for Quantum Effects and Applications, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha 410081, China;
2 School of Physics and Electronics, Hunan Key Laboratory of Super Microstructure and Ultrafast Process, State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China

Received:2021-03-03 Revised:2021-06-07 Accepted:2021-06-16 Online:2021-12-03 Published:2021-12-23
Contact: Mao-Fa Fang E-mail:mffang@hunnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 12064012 and 11374096).

摘要/Abstract

摘要： The protection of the entanglement between two V-atoms (EBTVA) in a multi-cavity coupling system is studied. The whole system consists of two V-atoms. The two V-atoms are initially in the maximum entangled state and interacts locally with its own dissipative cavity which is coupled to the external cavities with high quality factor (ECWHQF). The results show that, when there is no ECWHQF, the EBTVA can be protected effectively in the case where the V-atom and the dissipative cavity are weak coupled in large detuning, while when there are different numbers n of ECWHQF coupled to two dissipative cavities, by adjusting the parameters of the number n of ECWHQF and the coupling strength k between cavities, the EBTVA can be protected perfectly and continuously. Our result provides an effective method for protecting entanglement resources of three-level system.

关键词: V-atom, multi-cavity coupling system, entanglement, negativity

Abstract: The protection of the entanglement between two V-atoms (EBTVA) in a multi-cavity coupling system is studied. The whole system consists of two V-atoms. The two V-atoms are initially in the maximum entangled state and interacts locally with its own dissipative cavity which is coupled to the external cavities with high quality factor (ECWHQF). The results show that, when there is no ECWHQF, the EBTVA can be protected effectively in the case where the V-atom and the dissipative cavity are weak coupled in large detuning, while when there are different numbers n of ECWHQF coupled to two dissipative cavities, by adjusting the parameters of the number n of ECWHQF and the coupling strength k between cavities, the EBTVA can be protected perfectly and continuously. Our result provides an effective method for protecting entanglement resources of three-level system.

Key words: V-atom, multi-cavity coupling system, entanglement, negativity

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

03.65.Yz

42.50.Pq (Cavity quantum electrodynamics; micromasers) 03.65.Ud (Entanglement and quantum nonlocality)

Wen-Jin Huang(黄文进), Mao-Fa Fang(方卯发), and Xiong Xu(许雄). Protection of entanglement between two V-atoms in a multi-cavity coupling system[J]. 中国物理B, 2022, 31(1): 10301-010301.

Wen-Jin Huang(黄文进), Mao-Fa Fang(方卯发), and Xiong Xu(许雄). Protection of entanglement between two V-atoms in a multi-cavity coupling system[J]. Chin. Phys. B, 2022, 31(1): 10301-010301.

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Protection of entanglement between two V-atoms in a multi-cavity coupling system

Protection of entanglement between two V-atoms in a multi-cavity coupling system

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