Open AccessPhase compensation for free-space continuous-variable quantum key distribution
Author(s) -
Shiyu Wang,
Peng Huang,
Miaomiao Liu,
Tao Wang,
Ping Wang,
Guihua Zeng
Publication year - 2020
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.387402
Subject(s) - quantum key distribution , computer science , quantum channel , compensation (psychology) , free space , free space optical communication , quantum cryptography , fading , quantum , optics , quantum network , quantum information science , quantum imaging , channel (broadcasting) , electronic engineering , telecommunications , quantum information , physics , optical communication , quantum mechanics , quantum entanglement , engineering , psychology , psychoanalysis
Large-scale and flexible deployment of quantum networks is possible with reliable free-space quantum key distribution. However, signal fading occurs in free-space channels and causes various adverse effects. Under this circumstance, phase compensation becomes a challenging task for quantum key distribution using continuous variables. Here we investigate the feasibility of implementing phase compensation via simply computing the correlation between transmitted and received data. Demonstration and performance analysis are conducted with real transmittance of a 150-m free-space fading channel; results indicate the applicability of this compensation scheme to free-space quantum communication systems.