W态的高维量子安全直接通信  

High Dimensional Quantum Secure Direct Communication Based on W State

作　　者：翁鹏飞[1] 陈红[1] 蔡晓霞[1] 陈坚[1] 

机构地区：[1]解放军电子工程学院,合肥230037

出　　处：《激光杂志》2017年第6期21-24,共4页Laser Journal

基　　金：国家自然科学基金(61571446)

摘　　要：为了解决文献[1]中的一个重大缺陷,同时提高量子通信数据传输效率。我们设计了一种W态的高维量子安全直接通信方案。方案中,为了提高量子通信数据传输效率,我们引入了高维Bell态作为传输粒子,Alice(发送方)根据需要传输的信息,采用密集编码对传输信息序列进行编码,Bob(接收方)通过对接收粒子做联合测量,然后映射出相对应的经典信息。通信双方利用W粒子之间的纠缠特性,将W粒子作为检测粒子,通信双方通过对检测粒子的测量比较,从而实现信道的安全性。之后,采用熵理论和窃听检测分析协议的安全性,证明该方案是安全可靠的,最后计算得量子比特效率为43.8%,同时三粒子W态作为诱饵可以得到每量子位64%的窃听探测率,较扩展GHZ提高了6%的窃听率。In order to solve one of the major defects in the literature[l] and improve the data transmission efficien- cy. a Quantum Secure Direct Communication scheme based on the W state and high dimension Bell particles is de- signed. The secret information is transmitted by Alice（sender） through the high dimensional Bell state particles which use dense coding technique to improve the data transmission efficiency. Bob （receiver） joint measurement by means of receiving particle did, and mapped out the corresponding classical information. The receiver can calculate the security of the channel by W state particles, which based on the entanglement properties of W state particles. Then, the entro- py theory is used to analyze the security of the protocol. The results show that the proposed scheme is safe, reliable and has high transmission efficiency. Finally, the transmission quantum bit efficiency is 43.8%. If eavesdroppers in- tend to eavesdrop on secret information, the per qubit detection rate will be reach 64% by using three-particle W state as decoy, which compared with the expansion of GHZ increased by 6%.

关 键 词：量子安全直接通信 窃听检测 多维Bell态 量子信息 W态 

分 类 号：O431.2[机械工程—光学工程]