Practical gigahertz quantum key distribution based on avalanche photodiodes

Details Practical gigahertz quantum key distribution based on avalanche photodiodes Practical gigahertz quantum key distribution based on avalanche photodiodes

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009njph...11d5019y&link_type=abstract

New Journal of Physics, Volume 11, Issue 4, pp. 045019 (2009).

Physics

4

Scientific paper

We report in this paper a gigahertz clocked quantum key distribution (QKD) system using only practical components. Compact semiconductor avalanche photodiodes are used for high-speed single photon detection, whereas an attenuated laser is used as a light source in combination with the decoy protocol for guarding against photon-number-splitting attacks. The system is characterized by secure key rates of 1.02 Mbit s-1 for a fibre distance of 20 km and 10.1 kbit s-1 for 100 km. The suitability of standard single mode fibres as the quantum channel is also demonstrated.

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