Quantifying coherence with dynamical discord  

作　　者：Lian-Wu Yang Yun-Jie Xia 杨连武;夏云杰(School of Physical Science and Intelligent Engineering,Jining University,Qufu 273155,China;Shandong Provincial Key Laboratory of Laser Polarization and Information Technology,Department of Physics,Qufu Normal University,Qufu 273165,China)

机构地区：[1]School of Physical Science and Intelligent Engineering,Jining University,Qufu 273155,China [2]Shandong Provincial Key Laboratory of Laser Polarization and Information Technology,Department of Physics,Qufu Normal University,Qufu 273165,China

出　　处：《Chinese Physics B》2021年第12期222-228,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.61675115 and 11704221)。

摘　　要：Quantum coherence and discord are two kinds of manifestations of nonclassicality.By calculating the coherence and discord in the specific bipartite quantum systems,we show quantitative connections between the coherence and the discord in the bipartite quantum systems created from local systems with the help of incoherent operations.We show that the coherence bounds the dynamical discord,and under particular conditions of the initial quantum states,the coherence of single systems is equal to the dynamical discord.We extend these results to the multipartite quantum systems.

关 键 词：quantum coherence dynamical discord relative entropy 

分 类 号：O413.1[理学—理论物理]