论文部分内容阅读
针对传统量子密钥分配协议使用非理想单光子源会带来密钥生成率过低的问题,对光源进行优化,以奇相干光源代替传统弱相干光源,提出了基于奇相干光源非对称信道的测量设备无关量子密钥分配协议。在奇相干光源下,对比了对称信道和非对称信道测量设备无关量子密钥分配协议的性能优劣。分析了该协议中密钥生成率、单边效率与信道损耗之间的关系。仿真结果表明,奇相干光源的引入弥补了传统光源的不足,多光子数大大减少。随着信道损耗的增加,密钥生成率降低,但非对称信道的性能仍高于对称信道的。
The traditional quantum key distribution protocol using non-ideal single-photon source will lead to the key generation rate is too low, the optimization of the light source to odd-coherent light source instead of the traditional weak coherent light source, proposed based on the odd coherent light source asymmetric channel Measuring device irrelevant quantum key distribution protocol. Under the odd coherent light source, the advantages and disadvantages of quantum key distribution protocols over symmetric channel and asymmetric channel measurement equipment are compared. The relationship between key generation rate, unilateral efficiency and channel loss in this protocol is analyzed. Simulation results show that the introduction of odd coherent sources makes up for the lack of traditional light sources, and the multiphoton numbers are greatly reduced. As the channel loss increases, the key generation rate decreases, but the asymmetric channel performance is still higher than the symmetric channel.