Quantum Discord in any Mixture of Two Bi-Qubit Arbitrary Product States

作     者：王胜房 刘益民 李国锋 刘先松 张战军 

作者机构：Engineering Technology Research Center of Magnetic Materials Anhui Province School of Physics & Materials ScienceAnhui University Department of Physics Shaoguan University 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2013年第60卷第12期

页      面：667-672页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：Supported by the Specialized Research Fund for the Doctoral Program of Higher Education under Grant Nos.20103401110007,20123401110008 the National Natural Science Foundation of China under Grant Nos.10975001,11375011,51072002,and 51272003 the Program for Excellent Talents at the University of Guangdong Province(Guangdong Teacher LetterNo.79) the 211 Project of Anhui University 

主　　题：quantum discord numerical computation approach analytic expression any mixture two bi-qubit arbitrary product states 

摘      要：Quantum discord in any mixture of two bi-qubit arbitrary product states is studied with two different approaches. In the first approach the maximM classicM correlations are obtained via numerical computations, while in the second approach they are analytically derived. Quantum correlations captured with both approaches completely coincide, as is in accord with the conclusion of Cen et al. [Phys. Rev. A 83 （2011） 054101]. The symmetry reduction of the concerned states concerning quantum correlations is accomplished. The captured discords are amply analyzed so that some inherent distinct properties are revealed.