论文标题
超导纳米线单光子检测器的光电量统计
Photocounting statistics of superconducting nanowire single-photon detectors
论文作者
论文摘要
超导纳米线单光子检测器（SNSPDS）是用于计数单光子的有效测量设备。他们的应用领域涵盖了实验量子光学研究，光学量子计算，量子通信等。通过此检测器注册光子后，下一个检测器无法在死亡时间内注册，此后该功能会顺利恢复。我们已经将此特征包括在光反检测理论中，并引入了相应的光关照公式。在连续波检测的状态下，由于先前的测量时间窗口的记忆效应，光量统计量非线性取决于密度运算符。被考虑的例子表明，放松过程的强烈影响以及记忆对SNSPD的光封码统计数据的影响。
Superconducting nanowire single-photon detectors (SNSPDs) are efficient measurement devices used for counting single photons. The field of their applications covers experimental quantum-optical studies, optical quantum computing, quantum communication, and others. After registering a photon by such a detector, the next one cannot be registered during the dead time and after that this ability is smoothly restored. We have included this feature into the photodetection theory and introduced the corresponding photocounting formula. In the regime of continuous-wave detection, the photocounting statistics nonlinearly depends on the density operator due to a memory effect of previous measurement time windows. The considered examples demonstrate the strong influence of the relaxation process and the memory effect on the resulting photocounting statistics of the SNSPDs.
