量子安全直接通信网络技术的研究

项目名称： 量子安全直接通信网络技术的研究

项目编号： No.61301167

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 葛华

作者单位： 武汉理工大学

项目金额： 25万元

中文摘要： 随着量子信息技术的飞速发展，系统复杂度越来越高，客户对量子保密通信安全性要求的提高，如何更好的提高量子通信系统的可靠性、实用性是当前的研究热点。本项目在量子密钥分发系统的研究基础上提出了一种量子安全直接通信(QSDC)网络系统。主要包括结合光通信系统波分复用思想提出一种基于QSDC系统的复用结构，能较好的提高量子系统的通信容量和可靠性；对QSDC网络化进行研究，提出了新的中继方案，是该网络既能现有量子密钥分发系统进行有效简化，又能将量子通信系统实用化，适应现阶段通信系统网络化的要求；提出基于无噪子空间的QSDC网络化模型，对量子信道的噪声问题进行较好抑制，是QSDC系统能够更好的抵御外界的窃听和攻击，更好的提高系统安全性，并对网络化系统的通信效率进行的分析和评价。

中文关键词： 量子安全直接通信；量子复用系统；量子中继器；量子网络；无噪子空间

英文摘要： With the rapid development of quantum information technology,the complexity of information system is more and more high, the security requirement of quantum secure communication is improved. How to increase the reliability and practicality of quantum communication system is the hotspot recently. In the project a multiplexing structure of quantum secure direct communication network system based on WDM in optical communication system is proposed. This structure can improve the capacity and reliability. The quantum secure direct communication network system is studied, and a new repeater scheme is presented. It could simplify the quantum key distribution system, and it also make the quantum communication system is practical. This QSDC network system can satisfy the requirement of communication system network. A QSDC network module based on decoherence free subspace is proposed. It could reduce the noise of quantum channel, and prevent the eavesdroping and attacking outside the communication channel. The security of system is improved. The communication efficiency of network system is analyzed and evaluated.

英文关键词： quantum secure direct communication；quantum multiplexing system；quantum repeater；quantum network；decoherence free subspace