中文摘要：

该文提出了基于相干态的诱骗方案的仿真方法,并分析考察诱骗脉冲与信号脉冲的通过率比值,验证了诱骗方案对克服光子数分裂数攻击的有效性。将该比值作为考察量,仿真了以平均光子数为0,0.2,0.6分别作为真空信号,真实信号和诱骗信号。在信道损失参数为0.2dB/km,探测效率为20%,暗计数为10-5的情况下,安全通信距离可以达到140km。由于本仿真方法使用经典计算机仿真,为量子信息的研究提供了新的手段。

英文摘要：

The simulation method of decoy-state based on coherent states was proposed in this paper.We analyze the yield ratio of decoy pulses and signal pulses at the output,and verified the effectiveness of decoy state in overcoming the photon-number-splitting（PNS） attack.In addition,we take the yield ratio as a threshold that used to examine whether there exist a PNS attack.We simulate the average photon number 0,0.2,0.6,as the vacuum,signal and decoy,respectively.In the case of the channel loss is 0.2dB/km,detection efficiency is 20%,and dark count is 10-5,the results of simulation show the secure communication distance is up to 140km.Due to the classical computer simulation,a new scheme for quantum information research is provided.