光学学报, 2017, 37 (6): 0627001, 网络出版: 2017-06-08   

基于奇相干光源非对称信道的量子密钥分配协议

Quantum Key Distribution Protocols Based on Asymmetric Channels of Odd Coherent Sources
作者单位
西安邮电大学通信与信息工程学院, 陕西 西安 710121
摘要
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。
Abstract
In order to solve the problem that the key generation rate is too low when the non-ideal single photon source is used in the traditional quantum key distribution protocol, the light source is optimized, an odd coherent light source is used to replace the traditional weak coherent light source, and a measurement-device-independent quantum key distribution protocol based on the asymmetric channels of odd coherent sources is proposed. The performances of measurement-device-independent quantum key distribution protocols for symmetric and asymmetric channels with the odd coherent light source are compared. The relationship between the channel loss and the key generation rate and single-side efficiency in the proposed protocol is analyzed. The simulation results show that the introduction of the odd coherent light source makes up the deficiency of the traditional light source and also reduces the number of photons greatly. With the increase of the channel loss, the key generation rate decreases, but the performance of the asymmetric channel is still higher than that of the symmetric channel.

康丹娜, 何业锋. 基于奇相干光源非对称信道的量子密钥分配协议[J]. 光学学报, 2017, 37(6): 0627001. Kang Danna, He Yefeng. Quantum Key Distribution Protocols Based on Asymmetric Channels of Odd Coherent Sources[J]. Acta Optica Sinica, 2017, 37(6): 0627001.

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