基于cluster态的信道容量可控的可控量子安全直接通信方案

发布时间：2017-12-31 02:28

本文关键词：基于cluster态的信道容量可控的可控量子安全直接通信方案　出处：《物理学报》2017年18期 　论文类型：期刊论文

【摘要】：提出了一种基于五粒子cluster态的信道容量可控的可控量子安全直接通信方案.通信三方利用五粒子cluster态自身的粒子分布情况,结合诱骗光子,对粒子分别做Z基单粒子测量和Bell基测量,便可完成信道的第一次安全性检测.通信控制方Cindy通过对手中的粒子序列随机选用测量基(Z基或者X基)测量来决定信道容量,并通过经典信道公布结果.发送方Alice将要发送的信息以及校检信息用于对手中的粒子序列进行幺正操作编码,并插入诱骗光子后将编码后的粒子序列发给接收方Bob并通过经典信道告知其诱骗光子的位置信息.Bob接收到粒子序列后,按照经典信道Alice发送的信息,结合Cindy公布的信息,剔除诱骗光子后按照一定的规则对手中的两组粒子序列进行Bell基测量,便可解码完成第二次安全性检测以及得到Alice发送的信息.通过对五粒子cluster态的纠缠结构性质进行分析,阐明了五粒子cluster态在该方案中所表现出的特点的物理缘由.结果表明,只需变化测量基的规则和用于编码的粒子,可以将该方案推广成可控双向量子安全直接通信.
[Abstract]:A controllable quantum secure direct communication scheme based on five-particle cluster state with controllable channel capacity is proposed. The three-party communication utilizes the particle distribution of the five-particle cluster state. Combined with decoy photons, the particles were measured by Z-base single particle and Bell basis, respectively. The communication controller Cindy determines the channel capacity by randomly selecting the measurement base Z or X basis to measure the particle sequence in the channel. The results are published through classical channels. The information to be sent by the sender Alice and the calibration information are used to encode the particle sequence in the hands of unitary operation. After inserting the decoded photon, the encoded particle sequence is sent to the receiver Bob and the position information of the decoded photon is informed through the classical channel. Bob receives the particle sequence. According to the information sent by the classical channel Alice, combined with the information published by Cindy, the decoy photons are eliminated and the two groups of particle sequences in the hands are measured on the basis of Bell basis according to certain rules. The second security detection and the information sent by Alice can be decoded. The entanglement structure properties of five-particle cluster state are analyzed. The physical reasons for the characteristics of the five-particle cluster state in this scheme are explained. The results show that only the rules of the measurement base and the particles used for coding need to be changed. The scheme can be extended to controllable bidirectional quantum secure direct communication.
【作者单位】：广东水利电力职业技术学院自动化工程系;
【基金】：广东省自然科学基金(批准号:2016a030313736)资助的课题~~
【分类号】：O413;TN918
【正文快照】： QSDC方案,该方案被称之为“两步方案”.同年,1引言Deng和Long[5]提出了被称为DL-04的基于单光子量子态的一次一密QSDC方案.这两个方案给出量子安全直接通信(quantum secure direct了QSDC方案的基本标准、构造原理以及安全判定communication,QSDC)是在量子力学的基础上条件,有

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