Transformation relation between coherence and entanglement for two-qubit states  

作　　者：周晴云 范小刚 赵发 王栋 叶柳 Qing-Yun Zhou;Xiao-Gang Fan;Fa Zhao;Dong Wang;Liu Ye(School of Physics&Optoelectronics Engineering,Anhui University,Hefei 230601,China)

机构地区：[1]School of Physics&Optoelectronics Engineering,Anhui University,Hefei 230601,China

出　　处：《Chinese Physics B》2023年第1期178-182,共5页中国物理B（英文版）

基　　金：supported by the National Science Foundation of China (Grant Nos.12175001 and 12075001);the Natural Science Foundation of Education Department of Anhui Province,China (Grant No.KJ2016SD49)。

摘　　要：Entanglement and coherence are two important resources in quantum information theory. A question naturally arises:Is there some connection between them? We prove that the entanglement of formation and the first-order coherence of twoqubit states satisfy an inequality relation. Two-qubit pure state reaches the upper bound of this inequality. A large number of randomly generated states are used to intuitively verify the complementarity between the entanglement of formation and the first-order coherence. We give the maximum accessible coherence of two-qubit states. Our research results will provide a reliable theoretical basis for conversion of the two quantum resources.

关 键 词：ENTANGLEMENT COHERENCE first-order coherence entanglement of formation 

分 类 号：O413[理学—理论物理]