R Alléaume et al 2004 New J. Phys. 6 92 doi:10.1088/1367-2630/6/1/092
Experimental open-air quantum key distribution with a single-photon source
Focus on Single Photons on DemandR Alléaume1, F Treussart1, G Messin2, Y Dumeige1, J-F Roch1, A Beveratos2, R Brouri-Tualle2, J-P Poizat2 and P Grangier2
Show affiliationsPart of Focus on Single Photons on Demand
We describe the implementation of a quantum key distribution (QKD) system using a single-photon source, operating at night in open air. The single-photon source at the heart of the functional and reliable set-up relies on the pulsed excitation of a single nitrogen-vacancy colour centre in a diamond nanocrystal. We tested the effect of attenuation on the polarized encoded photons for inferring the longer distance performance of our system. For strong attenuation, the use of pure single-photon states gives measurable advantage over systems relying on weak attenuated laser pulses. The results are in good agreement with theoretical models developed to assess QKD security.
- PACS
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03.67.Dd Quantum cryptography and communication security
- Subjects
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Optics, quantum optics and lasers
- Dates
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Issue 1 (July 2004)
Received 13 February 2004
Published 29 July 2004
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Experimental open-air quantum key distribution with a single-photon source
R Alléaume et al 2004 New J. Phys. 6 92
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