23 February 2009 Improvement of QKD with practical photon-number resolving detectors
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Abstract
We propose a scheme of BB84 quantum key distribution (QKD) with a triggered parametric down-conversion (PDC) source. According to different results of Alice's measurement using a photon number resolving (PNR) detector, we separate photon pulses into three sets to implement the passive decoy method. Performances of two different kinds of widely-used PNR detectors, TES and TMD, are investigated by simulation. With the parameters of PNR detectors nowadays, TES and TMD perform similarly. Both of them can improve the secure transmission distance up to 171 km. Furthermore, compared with the case using threshold detectors, this scheme can achieve a higher key generation rate.
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Fangxing Xu, Fangxing Xu, Zhengfu Han, Zhengfu Han, Guangcan Guo, Guangcan Guo, } "Improvement of QKD with practical photon-number resolving detectors", Proc. SPIE 7278, Photonics and Optoelectronics Meetings (POEM) 2008: Fiber Optic Communication and Sensors, 72780Y (23 February 2009); doi: 10.1117/12.821881; https://doi.org/10.1117/12.821881
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