Quantum discord and its dynamics for multipartite systems  

作　　者：罗嘉欣 郭琼 Jiaxin Luo;Qiong Guo(College of Sciences,Shanghai Institute of Technology,Shanghai 201418,China)

机构地区：[1]College of Sciences,Shanghai Institute of Technology,Shanghai 201418,China

出　　处：《Chinese Physics B》2024年第6期168-175,共8页中国物理B（英文版）

基　　金：partially supported by the National Natural Science Foundation of China (Grant No. 11601338)。

摘　　要：Quantum discord, one of the famous quantum correlations, has been recently generalized to multipartite systems by Radhakrishnan et al. Here we give analytical solutions of the quantum discord for a family of N-qubit quantum states. For the bipartite system, we derive a zero quantum discord which will remain unchanged under the phase damping channel. For multiparitite systems, it is found that the quantum discord can be classified into three categories and the quantum discord for odd-partite systems can exhibit freezing under the phase damping channel, while the freezing does not exist in the even-partite systems.

关 键 词：quantum discord multipartite systems decoherence channels frozen discord 

分 类 号：O413[理学—理论物理]