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

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

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.

Keywords: geometric quantum discord (GQD) Berry phase charge qubits

Received: 27 May 2014
Revised: 07 July 2014
Accepted manuscript online:

PACS:	03.65.Ud	(Entanglement and quantum nonlocality)
	03.67.Hk	(Quantum communication)
	03.65.Yz	(Decoherence; open systems; quantum statistical methods)

Fund: 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.

Corresponding Authors: Zhang Guo-Feng
E-mail: gf1978zhang@buaa.edu.cn

Cite this article:

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 2014 Chin. Phys. B 23 120306

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

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