Fast quantum key distribution with decoy number states

Details Fast quantum key distribution with decoy number states Fast quantum key distribution with decoy number states

2007-05-03

arxiv.org/abs/0705.0515v1

Physics

Quantum Physics

15 pages, 6 figures; Accepted to J. Mod. Opt

Scientific paper

10.1080/09500340701441293

We investigate the use of photon number states to identify eavesdropping attacks on quantum key distribution (QKD) schemes. The technique is based on the fact that different photon numbers traverse a channel with different transmittivity. We then describe two QKD schemes that utilize this method, one of which overcomes the upper limit on the key generation rate imposed by the dead time of detectors when using a heralded source of photons.

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