基于旋转不变态的测量设备无关量子密钥分配协议研究

发布时间：2018-01-27 10:58

本文关键词： 旋转不变态偏振无关测量设备无关量子密钥分配协议　出处：《物理学报》2014年17期 　论文类型：期刊论文

【摘要】：本文提出了一种基于旋转不变态的偏振无关测量设备量子密钥分配协议,既适用于偏振编码测量设备无关量子密钥分配系统,也应用于相位编码测量设备无关量子密钥分配系统的相干过程.通过在线偏振基进入信道传输前嵌入2块q玻片,使得在传输过程中将线偏振基转化为旋转不变的圆偏振基,而第三方对接收到的脉冲进行Bell态测量前,利用q玻片的算符可逆性,将圆偏振基还原为线偏振基进行测量,可以有效消除信道传输中偏振旋转导致的误码.本文分析了偏振无关的三诱骗态测量设备无关量子密钥分配系统的误码率,研究了密钥生成率与安全传输距离的关系,仿真结果表明,对于偏振编码测量设备无关量子密钥分配系统,该协议可以有效提高系统的最大安全通信距离,为实用的量子密钥分配实验提供了重要的理论参数.
[Abstract]:In this paper, a novel polarization independent measurement device quantum key distribution protocol based on rotation invariance is proposed, which is suitable for polarization coding measurement device independent quantum key distribution system. It is also applied to the coherent process of the phase coding measurement device independent quantum key distribution system. Two Q slides are embedded before the channel transmission through the online polarization basis. The linear polarization basis is transformed into a rotation-invariant circular polarization basis during transmission, and the operator reversibility of Q glass is used before the third party measures the received pulse in Bell state. The circular polarization base is reduced to the linear polarization basis for measurement. The error rate caused by polarization rotation in channel transmission can be effectively eliminated. In this paper, the bit error rate of the polarization-independent three-decoy state measurement device independent quantum key distribution system is analyzed. The relationship between the key generation rate and the secure transmission distance is studied. The simulation results show that the protocol can effectively improve the maximum secure communication distance for the polarization coding measurement device independent quantum key distribution system. It provides important theoretical parameters for practical quantum key distribution experiments.
【作者单位】：空军工程大学信息与导航学院;西安通信学院信息安全系;
【基金】：国家自然科学基金(批准号:61106068)资助的课题~~
【分类号】：O413;TN918
【正文快照】： 1引言量子密钥分配[1]以其建立在量子力学和信息论框架下的无条件安全性特点[2-4],近年来已成为国内外的研究热点[5-9].最近,为了克服探测设备的非完美性问题,Lo小组[10]提出了测量设备无关量子密钥分配方案(Measurement-Device-Independent QKD,MDI-QKD).在该方案中,Al-ice和

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