Quantum Discord of Non-X State

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＂ alo...

Full description

Saved in:
Bibliographic Details
Published inCommunications in theoretical physics Vol. 59; no. 6; pp. 693 - 699
Main Authors Yao, Jing-Ying, Dong, Yu-Li, Zhu, Shi-Qun
Format Journal Article
LanguageEnglish
Published 01.06.2013
Subjects
Channels
Cut off
Damping
Mathematical analysis
Octahedrons
Tetrahedrons
Tubes
Vectors (mathematics)
八面体
几何对象
向量
和谐
四面体
状态
表面
量子
Online AccessGet full text

Cover

More Information
Summary: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.
Bibliography:YAO Jing-Ying ,t DONG Yu-Li, and ZHU Shi-qun （School of Physical Science and Technology, Soochow University, Suzhou 215006, China）
quantum discord, classical correlation, phase damping
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.
11-2592/O3
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0253-6102
DOI:10.1088/0253-6102/59/6/07