Quantum discord and its dynamics for multipartite systems

作     者：罗嘉欣 郭琼 Jiaxin Luo;Qiong Guo

作者机构：College of SciencesShanghai Institute of TechnologyShanghai 201418China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2024年第33卷第6期

页      面：168-175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：partially supported by the National Natural Science Foundation of China (Grant No. 11601338) 

主　　题：quantum discord multipartite systems decoherence channels frozen discord 

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.