Suppressing the Errors due to Mode Mismatch for M-ary PSK Quantum Receivers by Photon-Number-Resolving Detector

摘要

A M-ary phase shift keying (PSK) quantum receiver consisting of displacementoperations, photon counting, and electrical feed-back adaptive measurements isanalyzed with a realistic model considering the effects of the sub-unityquantum efficiency and the dark counts of single-photon detectors, as well asthe transmittance and the mode mismatch of beam splitters. Among these factors,the mode mismatch has the greatest impact on the error probability of thereceiver with on-off detectors. The errors due to mode mismatch can besuppressed effectively by using photon-number-resolving detectors (PNRD)instead of on-off detectors.