Open AccessThe effect of balanced homodyne detection on continuous variable quantum key distribution
Author(s) -
Jin-jian Chen,
Zheng-Fu Han,
Yongtao Zhao,
Youzhen Gui,
GuangCan Guo
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.5
Subject(s) - quantum key distribution , direct conversion receiver , homodyne detection , physics , beam splitter , continuous variable , quantum cryptography , key (lock) , noise (video) , detector , optics , computer science , photon , quantum , quantum mechanics , statistics , mathematics , quantum information , computer security , artificial intelligence , laser , image (mathematics)
Different from single photon quantum key distribution, continuous variable quantum key distribution uses the balanced homodyne detection. In this paper, the detection error of balanced homodyne caused by vacuum noise of the local light and unbalance of beam splitter is analyzed, the maximal safe distance limited by the electronic noise of balance homodyne detector is given, finally, the relationship between the noise of balanced homodyne detection and key rate are shown.