Improved practical decoy state method in quantum key distribution with parametric down-conversion source

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Improved practical decoy state method in quantum key distribution with parametric down conversion source

– In this paper, a new decoy-state scheme for quantum key distribution with parametric down-conversion source is proposed. We use both three-intensity decoy states and their triggered and nontriggered components to estimate the fraction of single-photon counts and quantum bit-error rate of single-photon, and then deduce a more accurate value of key generation rate. The final key rate over trans...

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Decoy states have recently been proposed as a useful method for substantially improving the performance of quantum key distribution QKD . Here, we present a general theory of the decoy state protocol based on only two decoy states and one signal state. We perform optimization on the choice of intensities of the two decoy states and the signal state. Our result shows that a decoy state protocol ...

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

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Simple and efficient quantum key distribution with parametric down-conversion.

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ژورنال

عنوان ژورنال: Europhysics Letters (EPL)

سال: 2007

ISSN: 0295-5075,1286-4854

DOI: 10.1209/0295-5075/79/40001