Measurement-device-independent quantum key distribution(MDI-QKD)is regarded as an efficient and practical building block of quantum networks because it eliminates loopholes on the detection side.Current MDI-QKD protocols implement non-ideal single-photon sources,and the decoy state method has been introduced to improve the key rate.A data processing method for MDI-QKD named the double-scanning method has performed excellently for processing statistical fluctuations.The double-scanning method enables higher key rates when estimating single-photon pair components using the decoy state method.However,this method suffers from requires time-consuming optimization.The article proposed a choosing solution,a novel decoy-state method,to achieve better performance of MDI-QKD than the original decoy-state method while requiring less optimization time than the double-scanning method.In simulations with some experimental parameter values,the article proposed method yielded a higher key rate than the decoy state method.Because no additional scanning optimization is needed,the MDI-QKD protocol with our method is advantageous to its speed and good hardware compatibility.
quantum key distributionmeasurement-device-independentdecoy state method
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