RECEIVER FOR QUANTUM KEY DISTRIBUTION AND METHOD FOR USING SINGLE PHOTON DETECTOR

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 η/(1+P_a) where η represents a detection efficiency and P_a represents after-pulse probability.;COPYRIGHT: (C)2015,JPO&INPIT