Geometrical quantum discord and negativity of two separable and mixed qubits

doi:10.1088/1674-1056/ab37f6

中国物理B ›› 2019, Vol. 28 ›› Issue (9): 90304-090304.doi: 10.1088/1674-1056/ab37f6

Geometrical quantum discord and negativity of two separable and mixed qubits

Tang-Kun Liu(刘堂昆), Fei Liu(刘飞), Chuan-Jia Shan(单传家), Ji-Bing Liu(刘继兵)

College of Physics and Electronic Science, Hubei Normal University, Huangshi 435002, China

收稿日期:2019-05-08 修回日期:2019-07-09 出版日期:2019-09-05 发布日期:2019-09-05
通讯作者: Tang-Kun Liu E-mail:tkliu@hbnu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11604090).

Geometrical quantum discord and negativity of two separable and mixed qubits

Tang-Kun Liu(刘堂昆), Fei Liu(刘飞), Chuan-Jia Shan(单传家), Ji-Bing Liu(刘继兵)

College of Physics and Electronic Science, Hubei Normal University, Huangshi 435002, China

Received:2019-05-08 Revised:2019-07-09 Online:2019-09-05 Published:2019-09-05
Contact: Tang-Kun Liu E-mail:tkliu@hbnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11604090).

摘要/Abstract

摘要：

We studied quantum correlation and quantum entanglement of a quantum system in which a coherent state light field interacts with two qubits that are initially prepared in a separable and mixed state. The influence of mean photon number of the coherent field and distribution probability of the atom on the geometrical quantum discord and the negativity are discussed. Our results show that the mean photon number of light field and distribution function of the atom can regulate and control the quantum correlation and quantum entanglement.

关键词: geometrical quantum discord, quantum correlation, negativity, quantum entanglement

Abstract:

Key words: geometrical quantum discord, quantum correlation, negativity, quantum entanglement

中图分类号: (Entanglement and quantum nonlocality)

03.65.Ud

42.50.Pq (Cavity quantum electrodynamics; micromasers)

刘堂昆, 刘飞, 单传家, 刘继兵. Geometrical quantum discord and negativity of two separable and mixed qubits[J]. 中国物理B, 2019, 28(9): 90304-090304.

Tang-Kun Liu(刘堂昆), Fei Liu(刘飞), Chuan-Jia Shan(单传家), Ji-Bing Liu(刘继兵). Geometrical quantum discord and negativity of two separable and mixed qubits[J]. Chin. Phys. B, 2019, 28(9): 90304-090304.

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Geometrical quantum discord and negativity of two separable and mixed qubits

Geometrical quantum discord and negativity of two separable and mixed qubits

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