Quantum Discord of Non-X State  

作　　者：姚晶莹 董裕力 朱士群 

机构地区：[1]School of Physical Science and Technology, Soochow University

出　　处：《Communications in Theoretical Physics》2013年第6期693-699,共7页理论物理通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos.11074184,11204197;the Specialized Research Fund for the Doctoral Program of Higher Education under Grant No.20103201120002;the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)

摘　　要：The level surfaces of quantum discord for a class of two-qubit states are investigated when the Bloch vectors T and S are perpendicularly oriented. The geometric objects of tetrahedron T and octahedron 0 are deformed. The level surfaces of constant discord are formed by three interaction ＂tubes＂ along three orthogonal directions. They shrink to the center when the B1oeh vectors are increased and are expanded and cut off by the state tetrahedron T when the quantum discord is increased, in the phase damping channel, the quantum discord keeps approximately a constant when the time increases.

关 键 词：quantum discord classical correlation phase damping 

分 类 号：O413[理学—理论物理] P208[理学—物理]