Open AccessHigh performance frame synchronization for continuous variable quantum key distribution systems
Author(s) -
Dakai Lin,
Peng Huang,
Duan Huang,
Chao Wang,
Jinye Peng,
Guihua Zeng
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.022190
Subject(s) - quantum key distribution , computer science , synchronization (alternating current) , frame (networking) , channel (broadcasting) , frame synchronization , quantum channel , key (lock) , quantum , optics , electronic engineering , telecommunications , physics , quantum information , engineering , quantum mechanics , computer security
Considering a practical continuous variable quantum key distribution(CVQKD) system, synchronization is of significant importance as it is hardly possible to extract secret keys from unsynchronized strings. In this paper, we proposed a high performance frame synchronization method for CVQKD systems which is capable to operate under low signal-to-noise(SNR) ratios and is compatible with random phase shift induced by quantum channel. A practical implementation of this method with low complexity is presented and its performance is analysed. By adjusting the length of synchronization frame, this method can work well with large range of SNR values which paves the way for longer distance CVQKD.