Abstract
Parameter selection has significant influence on the performance of practical measurement-device-independent quantum key distributions. In this paper, we develop a general model for optimizing the performance of decoy-state measurement-device-independent quantum key distributions under practical experimental conditions, e.g., with finite number of pulses and including intensity fluctuations. By implementing the local search algorithm, we are able to carry out full parameter optimization within reasonable computer time. Moreover, we do calculation for the two most often used light sources, i.e., the weak coherent sources and heralded single-photon sources. Our simulation results show that the case of using heralded single-photon sources would suffer less influence from realistic conditions, exhibiting relatively better performance on both the secure key rate and secure transmission distance.
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