Characterization of photon statistics in a single-photon source via variable attenuation
Characterization of photon statistics in a single-photon source via variable attenuation
复制标题
通过可变衰减表征单光子源中的光子统计
DOI：
10.1103/physreva.80.043807
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发表时间：
2009-10
影响因子：
2.9
通讯作者：
Li, Chuanfeng
中科院分区：
文献类型：
--
作者：
Guo, Guangcan;Zou, Xubo;Jin, Chenhui;Zhang, Shengli;Li, Chuanfeng
我们提出了一个简单而有效的方案来表征一个实际的单光子源的光子数统计。该方案利用诱骗态量子密码中常用的可变衰减方法来增强光子数统计估计。得到了更严格的真空和单光子比例的界，这一结果，反过来，被证明是适用于无条件安全的量子密码通信与单光子器件。
We propose a simple but effective scheme for characterizing photon-number statistics of a practical single-photon source. In this scheme, the variable attenuation method which frequently appears in decoy state quantum cryptography is utilized here to enhance the estimation of photon-number statistics. A much stricter bound for vacuum and single-photon proportions is obtained and this result, in turn, is shown to be applicable to the unconditional secure quantum cryptographic communication with single-photon devices.