Phys. Rev. Lett. 89, 187901 (2002) [4 pages]Single Photon Quantum CryptographyReceived 6 June 2002; published 10 October 2002 We report the full implementation of a quantum cryptography protocol using a stream of single photon pulses generated by a stable and efficient source operating at room temperature. The single photon pulses are emitted on demand by a single nitrogen-vacancy color center in a diamond nanocrystal. The quantum bit error rate is less that 4.6% and the secure bit rate is 7700 bits/s. The overall performances of our system reaches a domain where single photons have a measurable advantage over an equivalent system based on attenuated light pulses. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.187901
DOI:
10.1103/PhysRevLett.89.187901
PACS:
03.67.Dd, 42.50.Dv
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