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基于改造的弱相干态光源,提出了一种非正交编码被动诱骗态量子密钥分配方案.该方案不主动制备诱骗态,而是根据发送端探测器是否响应,将接收端的探测结果分为响应集合和未响应集合,以此分别作为信号态和诱骗态,并利用这两个集合来估计参量和生成密钥.数值仿真表明,非正交编码被动诱骗态方案的密钥生成效率和安全传输距离都优于现有的被动诱骗态方案,且性能非常接近主动无穷诱骗态方案的理论极限值;未响应集合对密钥生成的参与使方案性能免受发送端探测效率的影响,弥补了实际探测器探测效率低下的缺陷;由于不需要主动制备诱骗态,该方案实现非常简单,适用于高速量子密钥分配的场合.
Based on the modified weakly coherent state light source, a non-orthogonal encoding passive decoy state quantum key distribution scheme is proposed, which does not take the initiative to prepare a decoy state, but according to whether the detector at the sending end responds or not, As a signal state and a decoy state, respectively, and use these two sets to estimate the parameters and generate the key.The numerical simulation shows that the key generation efficiency and safety of the passive decoy state scheme with non-orthogonal coding The transmission distance is better than the existing passive decoy scheme and its performance is very close to the theoretical limit of the proactive infatuation scheme; the participation of the unresponsive set on key generation exempts the scheme performance from the detection efficiency of the sender, which makes up The actual detector detects the defect of low efficiency. Because it does not need to actively prepare the decoy state, the scheme is very simple and suitable for the application of high speed quantum key distribution.