Finite-size analysis of eight-state continuous-variable quantum key distribution with the linear optics cloning machine*

Project supported by the National Natural Science Foundation of China (Grant Nos. 61379153 and 61572529).

Zhang Hang, Mao Yu, Huang Duan, Guo Ying, Wu Xiaodong, Zhang Ling
       

(color online) Relationship between maximum transmission distance and secret key rate with the parameters’ analysis of LOCM in the finite-size scenario, where the exchanged number signals N = 1012. (a) Comparison of the performance between the eight-state protocol based on LOCM operation and the original eight-state protocol with parameters λ = 0.3 and τ = {0.25, 0.45, 0.65}. (b) Comparison of the performance between the eight-state protocol based on LOCM operation and the original eight-state protocol with parameters τ = 0.45 and λ = {0.1, 0.3, 0.5}.