论文信息 - An advanced design of receiver for free space quantum key distribution system

An advanced design of receiver for free space quantum key distribution system

We presented an advanced design of receiver in free space quantum key distribution (QKD) system based on BB84 protocol. In this system, a novel four polarization beam splitter is used in the receiver. It simplifies the receiver fabrication process, and the reflection loss is reduced too. Then we built the transmitter and the receiver for QKD system. The outdoor 200m free space QKD experiment was carried out, the bit error rate is 0.91% when the average photon number in each optical pulse was about 0.1. This result indicates that our design for the QKD system is feasible.

[1] Paul G. Kwiat,et al. Free-space quantum key distribution at night , 1998, Defense, Security, and Sensing.

[2] Shor,et al. Simple proof of security of the BB84 quantum key distribution protocol , 2000, Physical review letters.

[3] Richard J. Hughes,et al. Practical free-space quantum key distribution over 10 km in daylight and at night , 2002, quant-ph/0206092.

[4] Walter R. Leeb,et al. Satellite-based quantum communication terminal employing state-of-the-art technology , 2005 .

[5] Gilles Brassard,et al. Quantum Cryptography , 2005, Encyclopedia of Cryptography and Security.

[6] M. Fürst,et al. Free-space quantum cryptography for metropolitan areas , 2006, SPIE Security + Defence.

[7] Gregor Weihs,et al. Entangled free-space quantum key distribution , 2007, SPIE Optics East.

[8] H. Weinfurter,et al. Experimental Demonstration of Free-Space Decoy-State Quantum Key Distribution over 144 km , 2007, 2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference.

[9] J. Shi,et al. Theoretical analysis of non-polarizing beam splitters with appropriate amplitude and phase , 2009 .

[10] M. Toyoshima,et al. Polarization measurements through space-to-ground atmospheric propagation paths by using a highly polarized laser source in space. , 2009, Optics express.

[11] V. Scarani,et al. The security of practical quantum key distribution , 2008, 0802.4155.