Passive decoy-state quantum key distribution for the weak coherent photon source with finite-length key

Li Yuan^{1, 2}, Bao Wansu^{1, 2, †,}, Li Hongwei^{1, 2}, Zhou Chun^{1, 2}, Wang Yang^{1, 2}

Key generation rateRversus transmission distancedwith differentN(N= 10ⁱ,i= 7, 8, 9, 10, ∞).