Simple and efficient quantum key distribution with parametric down-conversion
Simple and efficient quantum key distribution with parametric down-conversion
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DOI：
10.1103/physrevlett.99.180503
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发表时间：
2007-11-02
影响因子：
8.6
通讯作者：
Imoto, Nobuyuki
中科院分区：
文献类型：
--
作者：
Adachi, Yoritoshi;Yamamoto, Takashi;Imoto, Nobuyuki
提出了一种基于参数下转换(PDC)产生光子对的高效量子密钥分发协议。它使用与传统协议相同的实验设置，但经过改进的数据分析可以利用来自内置诱饵状态的信息来检测光子数分裂攻击。假设使用实际的检测器，我们对新方案的无条件安全性进行了分析，结果表明，在使用高强度PDC源的情况下，新方案在远距离将安全密钥生成率提高了几个数量级。
We propose an efficient quantum key distribution protocol based on the photon-pair generation from parametric down-conversion (PDC). It uses the same experimental setup as the conventional protocol, but a refined data analysis enables detection of photon-number splitting attacks by utilizing information from a built-in decoy state. Assuming the use of practical detectors, we analyze the unconditional security of the new scheme and show that it improves the secure key generation rate by several orders of magnitude at long distances, using a high intensity PDC source.