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

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.

preprint2006arXivOpen access
Qin WangXiang-Bin WangGuang-Can Guo
quant-ph
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Open access3 authors1 topic
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Qin WangXiang-Bin WangGuang-Can Guo

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