Quantum coherence preservation of atom with a classical driving field under non-Markovian environment

doi:10.1088/1674-1056/26/11/110303

中国物理B ›› 2017, Vol. 26 ›› Issue (11): 110303-110303.doi: 10.1088/1674-1056/26/11/110303

Quantum coherence preservation of atom with a classical driving field under non-Markovian environment

De-Ying Gao(高德营), Qiang Gao(高强), Yun-Jie Xia(夏云杰)

1. Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Department of Physics, Qufu Normal University, Qufu 273165, China;
2. College of Dong Chang, Liaocheng University, Liaocheng, Shandong 252000, China

收稿日期:2017-05-05 修回日期:2017-07-25 出版日期:2017-11-05 发布日期:2017-11-05
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61675115, 11204156, 11574178, 11304179, and 11647172) and the Science and Technology Plan Projects of Shandong University, China (Grant No. J16LJ52).

Quantum coherence preservation of atom with a classical driving field under non-Markovian environment

De-Ying Gao(高德营)^1,2, Qiang Gao(高强)¹, Yun-Jie Xia(夏云杰)¹

1. Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Department of Physics, Qufu Normal University, Qufu 273165, China;
2. College of Dong Chang, Liaocheng University, Liaocheng, Shandong 252000, China

Received:2017-05-05 Revised:2017-07-25 Online:2017-11-05 Published:2017-11-05
Contact: Yun-Jie Xia E-mail:yjxia@mail.qfnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61675115, 11204156, 11574178, 11304179, and 11647172) and the Science and Technology Plan Projects of Shandong University, China (Grant No. J16LJ52).

摘要/Abstract

摘要： The exact dynamics of an open quantum system consisting of one qubit driven by a classical driving field is investigated. Our attention is focused on the influences of single-and two-photon excitations on the dynamics of quantum coherence and quantum entanglement. It is shown that the atomic coherence can be improved or even maintained by the classical driving field, the non-Markovian effect, and the atom-reservoir detuning. The interconversion between the atomic coherence and the atom-reservoir entanglement exists and can be controlled by the appropriate conditions. The conservation of coherence for different partitions is explored, and the dynamics of a system with two-photon excitations is different from the case of single-photon excitation.

关键词: quantum coherence, non-Markovian process, classical driving field

Abstract: The exact dynamics of an open quantum system consisting of one qubit driven by a classical driving field is investigated. Our attention is focused on the influences of single-and two-photon excitations on the dynamics of quantum coherence and quantum entanglement. It is shown that the atomic coherence can be improved or even maintained by the classical driving field, the non-Markovian effect, and the atom-reservoir detuning. The interconversion between the atomic coherence and the atom-reservoir entanglement exists and can be controlled by the appropriate conditions. The conservation of coherence for different partitions is explored, and the dynamics of a system with two-photon excitations is different from the case of single-photon excitation.

Key words: quantum coherence, non-Markovian process, classical driving field

中图分类号: (Quantum information)

03.67.-a

03.65.-w (Quantum mechanics) 03.65.Yz (Decoherence; open systems; quantum statistical methods)

高德营, 高强, 夏云杰. Quantum coherence preservation of atom with a classical driving field under non-Markovian environment[J]. 中国物理B, 2017, 26(11): 110303-110303.

De-Ying Gao(高德营), Qiang Gao(高强), Yun-Jie Xia(夏云杰). Quantum coherence preservation of atom with a classical driving field under non-Markovian environment[J]. Chin. Phys. B, 2017, 26(11): 110303-110303.

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Quantum coherence preservation of atom with a classical driving field under non-Markovian environment

Quantum coherence preservation of atom with a classical driving field under non-Markovian environment

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