Practical decoy state method in quantum key distribution with heralded single photon source

Details Practical decoy state method in quantum key distribution with heralded single photon source Practical decoy state method in quantum key distribution with heralded single photon source

2006-10-17

arxiv.org/abs/quant-ph/0610134v1

Physics

Quantum Physics

10 pages, 4 Postscript figures

Scientific paper

We propose a practical decoy state method with heralded single photon source for quantum key distribution (QKD). In the protocol, 3 intensities are used and one can estimate the fraction of single-photon counts. The final key rate over transmission distance is simulated under various parameter sets. Due to the lower dark count than that of a coherent state, it is shown that a 3-intensity decoy-state QKD with a heralded source can work for a longer distance than that of a coherent state.

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