Geometric quantum discord and Berry phase between two charge qubits coupled by a quantum transmission line

doi:10.1088/1674-1056/23/12/120306

›› 2014, Vol. 23 ›› Issue (12): 120306-120306.doi: 10.1088/1674-1056/23/12/120306

Geometric quantum discord and Berry phase between two charge qubits coupled by a quantum transmission line

朱汉杰, 张国锋

Department of Physics, School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China

收稿日期:2014-05-27 修回日期:2014-07-07 出版日期:2014-12-15 发布日期:2014-12-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11174024), the State Key Laboratory of Low-Dimensional Quantum Physics (Tsinghua University) (Grant No. KF201407), the Fundamental Research Funds for the Central Universities of Beihang University (Grant No. YWF-14-WLXY-017), and Beijing City Youth Talent Plan.

Geometric quantum discord and Berry phase between two charge qubits coupled by a quantum transmission line

Zhu Han-Jie (朱汉杰), Zhang Guo-Feng (张国锋)

Department of Physics, School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China

Received:2014-05-27 Revised:2014-07-07 Online:2014-12-15 Published:2014-12-15
Contact: Zhang Guo-Feng E-mail:gf1978zhang@buaa.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11174024), the State Key Laboratory of Low-Dimensional Quantum Physics (Tsinghua University) (Grant No. KF201407), the Fundamental Research Funds for the Central Universities of Beihang University (Grant No. YWF-14-WLXY-017), and Beijing City Youth Talent Plan.

摘要/Abstract

摘要： Geometric quantum discord (GQD) and Berry phase between two charge qubits coupled by a quantum transmission line are investigated. We show how GQDs evolve and investigate their dependencies on the parameters of the system. We also calculate the energy and the Berry phase and compare them with GQD, finding that there are close connections between them.

关键词: geometric quantum discord (GQD), Berry phase, charge qubits

Abstract: Geometric quantum discord (GQD) and Berry phase between two charge qubits coupled by a quantum transmission line are investigated. We show how GQDs evolve and investigate their dependencies on the parameters of the system. We also calculate the energy and the Berry phase and compare them with GQD, finding that there are close connections between them.

Key words: geometric quantum discord (GQD), Berry phase, charge qubits

中图分类号: (Entanglement and quantum nonlocality)

03.65.Ud

03.67.Hk (Quantum communication) 03.65.Yz (Decoherence; open systems; quantum statistical methods)

朱汉杰, 张国锋. Geometric quantum discord and Berry phase between two charge qubits coupled by a quantum transmission line[J]. , 2014, 23(12): 120306-120306.

Zhu Han-Jie (朱汉杰), Zhang Guo-Feng (张国锋). Geometric quantum discord and Berry phase between two charge qubits coupled by a quantum transmission line[J]. Chin. Phys. B, 2014, 23(12): 120306-120306.

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Geometric quantum discord and Berry phase between two charge qubits coupled by a quantum transmission line

Geometric quantum discord and Berry phase between two charge qubits coupled by a quantum transmission line

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