利用冯·诺依曼熵获得最大纠缠态的形式（英文）  

Obtaining the form of maximally entangled state via von Neumann entropy

作　　者：朱孟正[1,2] 赵春然 李洪俊[1] 张东杰[1] ZHU Meng-zheng;ZHAO Chun-ran;LI Hong-jun;ZHANG Dong-jie(School of Physics and Electronic Information,Huaibei Normal University,Huaibei 235000,China;Information College,Huaibei Normal University,Huaibei 235000,China)

机构地区：[1]淮北师范大学物理与电子信息学院,安徽淮北235000 [2]淮北师范大学信息学院,安徽淮北235000

出　　处：《吉林师范大学学报（自然科学版）》2018年第2期78-82,共5页Journal of Jilin Normal University:Natural Science Edition

基　　金：Anhui Natural Science Foundation(1808085MA08);Educational Commission of Anhui Province of China(KJ2018A0672);National Nature Science Foundation China(51502106)

摘　　要：纠缠在量子信息处理中有许多重要的应用,正如Bell态对量子通信的实施是必不可少的.考虑如何得到Bell态,本文提出了一种用冯·诺依曼熵求解二体或三体系统中最大纠缠态表示形式的方法.计算二体或三体系统的量子态的冯·诺依曼熵,并将约化密度算符与用Bloch矢量表示的密度算符进行比较.根据密度算符具有正的、厄密性的特点,得到了最大纠缠态解析式,如Bell态和GHZ态.Entanglement has many useful applications in quantum information processing.Just as Bell states are essential for the implementation of quantum communication.To get the Bell states,this article presented a method for solving the representation of the maximally entangled states in bipartite or tripartite systems using von Neumann entropy.The von Neumann entropy of the quantum states in the bipartite or tripartite systems was calculated and the reduced density operator with the density operator in the form of the Bloch vertor was compared.According to the character that the density operator was a positive Hermitian operator,the maximally entangled states such as the Bell states and the GHZ states were obtained.

关 键 词：冯·诺依曼熵 纠缠态 密度算符 

分 类 号：O413.1[理学—理论物理]