Open AccessThe experimental research on a stable free-space quantum key distribution system with low noise
Author(s) -
Jindong Wang,
Lu Wei,
Feng Qing Zhao,
Xiaobao Liu,
Banghong Guo,
Jing Zhang,
Huang Yu-Xian,
Lu Yi-Qun,
Songhao Liu
Publication year - 2008
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.57.4214
Subject(s) - quantum key distribution , noise (video) , faraday cage , phase noise , quantum noise , michelson interferometer , optics , physics , differential phase , free space , laser , interferometry , quantum , computer science , phase (matter) , quantum mechanics , artificial intelligence , image (mathematics) , magnetic field
A free-space quantum key distribution system is demonstrated experimentally which makes use of polarized coherent short laser pulses and the differential phase shift scheme with a Faraday-Michelson interferometer. The system features low noise, high stability and low bit-error rate. In the proposed experimental scheme, polarizated short laser pulse of several nanoseconds duration is made to transmit through the free space to decrease noise and a low bit-error rate less than 6% is achieved.