Fujiwara Mikio, Honjo Toshimori, Shimizu Kaoru, Tamaki Kiyoshi, Sasaki Masahide
National Institute of Information and Communication Technology, 4-2-1 Nukui-kitamachi, Koganei, Tokyo 184-8795, Japan.
Opt Express. 2013 Mar 11;21(5):6304-12. doi: 10.1364/OE.21.006304.
We derive the time-dependent photo-detection probability equation of a superconducting single photon detector (SSPD) to study the responsive property for a pulse train at high repetition rate. Using this equation, we analyze the characteristics of SSPDs when illuminated by bright pulses in blinding attack on a quantum key distribution (QKD). We obtain good agreement between expected values based on our equation and actual experimental values. Such a time-dependent probability analysis contributes to security analysis.
我们推导了超导单光子探测器（SSPD）的时间相关光探测概率方程，以研究其对高重复率脉冲序列的响应特性。利用该方程，我们分析了量子密钥分发（QKD）中致盲攻击下强光脉冲照射时SSPD的特性。我们发现基于方程的预期值与实际实验值之间具有良好的一致性。这种时间相关概率分析有助于安全性分析。
