A Note on Quantum Key Channel Efficiency and Security using Correlated Photon Beam Transmitters

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Quantum-correlated photon sources provide a means of suppressing multiple photon emission and thus improving the security and efficiency of quasi single-photon quantum key distribution systems. We present illustrative photon-counting statistics for a Poissonian source conditioned by photon number measurements on a fully correlated twin beam with a non-ideal photon counter. We show that high photon counting efficiency is needed to obtain significant improvement in channel efficiency (bits per symbol) and/or security (in the form of reduced Shannon entropy leakage) over a single beam source.
3 Pages, 2 Figures

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Quantum Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/89003

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/quant-ph/0008013
 http://arxiv.org/abs/quant-ph/0008013

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arXiv