Experimental Study on Practical Quantum Key Distribution Scheme with Time-Multiplexed Technique
HUANG Yu-Xian1, HU Hua-Peng1, LIANG Rui-Sheng*, LU Yi-Qun1, WANG Jin-Dong1
1Lab of Photonic Information Technology, School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 5100062Hefei Institute of Intelligent Machine, Chinese Academy of Sciences, Hefei 230031
Experimental Study on Practical Quantum Key Distribution Scheme with Time-Multiplexed Technique
HUANG Yu-Xian1, HU Hua-Peng1, LIANG Rui-Sheng*, LU Yi-Qun1, WANG Jin-Dong1
1Lab of Photonic Information Technology, School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 5100062Hefei Institute of Intelligent Machine, Chinese Academy of Sciences, Hefei 230031
摘要We present a scheme that is capable of detecting photon numbers during the quantum key distribution (QKD) based on an improved differential phase shift (DPS) system without Trojan horse attack. A time-multiplexed detector (TMD) is set in for the photon-number resolution. Two fibre loops are used for detecting photon numbers as well as distributing keys. The long-term stabilization is guaranteed by two Faraday mirrors (FM) at Bob's site to automatically compensate for polarization defect. Our experimental study (90km QKD is completed) indicates that such a system is stable and secure which nearly reaches the performance of a single photon scheme.
Abstract：We present a scheme that is capable of detecting photon numbers during the quantum key distribution (QKD) based on an improved differential phase shift (DPS) system without Trojan horse attack. A time-multiplexed detector (TMD) is set in for the photon-number resolution. Two fibre loops are used for detecting photon numbers as well as distributing keys. The long-term stabilization is guaranteed by two Faraday mirrors (FM) at Bob's site to automatically compensate for polarization defect. Our experimental study (90km QKD is completed) indicates that such a system is stable and secure which nearly reaches the performance of a single photon scheme.
HUANG Yu-Xian;HU Hua-Peng;LIANG Rui-Sheng*;LU Yi-Qun;WANG Jin-Dong. Experimental Study on Practical Quantum Key Distribution Scheme with Time-Multiplexed Technique[J]. 中国物理快报, 2008, 25(7): 2485-2487.
HUANG Yu-Xian, HU Hua-Peng, LIANG Rui-Sheng*, LU Yi-Qun, WANG Jin-Dong. Experimental Study on Practical Quantum Key Distribution Scheme with Time-Multiplexed Technique. Chin. Phys. Lett., 2008, 25(7): 2485-2487.
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2008, Vol. 25 
