Measurement-device-independent quantum key distribution with modified coherent state.
Measurement-device-independent quantum key distribution with modified coherent state.
复制标题
DOI：
10.1364/ol.39.000880
复制
发表时间：
2014-02
期刊：
影响因子：
3.6
通讯作者：
Mo Li;Chunmei Zhang;Z. Yin;Wei Chen;Shuang Wang;G. Guo;Z. Han
中科院分区：
文献类型：
--
作者：
Mo Li;Chunmei Zhang;Z. Yin;Wei Chen;Shuang Wang;G. Guo;Z. Han
提出了独立于测量设备的量子密钥分配(MDI-QKD)协议，以消除探测器侧信道攻击。由于相干源的多光子事件，MDI-QKD协议的现实实现必须使用诱饵态来抵御光子数分裂攻击。基于弱相干态(WCSs)的MDI-QKD的诱骗态是近年来研究的热点。在这封信中，我们建议使用修改的相干态(MCS)源来执行MDI-QKD协议。仿真了基于MCS信源的MDI-QKD在诱饵状态下的性能。仿真结果表明，MCS信源可以显著提高系统的密钥传输速率和传输距离。这一改进背后的物理原理是，MCS的多光子事件几率低于WCS，而同时单光子几率更高。
The measurement-device-independent quantum key distribution (MDI-QKD) protocol has been proposed for the purpose of removing the detector side channel attacks. Due to the multiphoton events of coherent states sources, real-life implementations of MDI-QKD protocol must employ decoy states to beat the photon-number-splitting attack. Decoy states for MDI-QKD based on the weak coherent states (WCSs) have been studied recently. In this Letter, we propose to perform MDI-QKD protocol with modified coherent states (MCS) sources. We simulate the performance of MDI-QKD with the decoy states based on MCS sources. And our simulation indicates that both the secure-key rate and transmission distance can be improved evidently with MCS sources. The physics behind this improvement is that the probability of multiphoton events of the MCS is lower than that of WCSs while at the same time the probability of single-photon is higher.