| 摘要 |
PROBLEM TO BE SOLVED: To provide a receiver including a single photon detector, in which a generation rate of a safety key is not restricted by after-pulse probability and a good generation rate of a safety key for after-pulse probability in a wide range can be obtained.SOLUTION: A receiver for quantum key distribution, which is used in a quantum key distribution system utilizing a quantum entangled photon pair comprising a signal photon and an idler photon, includes a single photon detector in which a generation rate of a safety key depends on a figure of merit &eegr;/(1+P) where &eegr; represents a detection efficiency and Prepresents after-pulse probability. |
