Quantum Discord for a Qutrit-Qutrit System under Depolarizing and Dephasing Noise  

作　　者：YANG Yang WANG An-Min 杨阳;王安民(Department of Modern Physics,University of Science and Technology of China,Hefei 230026)

机构地区：[1]Department of Modern Physics,University of Science and Technology of China,Hefei 230026

出　　处：《Chinese Physics Letters》2013年第8期21-24,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 10975125.

摘　　要：The dynamics of quantum discord for a class of qutrit-qutrit states under depolarizing and dephasing noise are investigated using the geometric measure of quantum discord.We find that in the quantum discord for these states,a sudden change near the transition point exists from a bound-entangled to a free-entangled state,and that the sudden change point remains unchanged in later evolution under depolarizing noise.Moreover,the behavior of quantum discord is independent of the parameter of the given initial states in many regions.

关 键 词：QUANTUM POLAR STATES 

分 类 号：O41[理学—理论物理]