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) (a) PM scheme of the eight-state CV-QKD protocol: Alice obtained the random number k from a random number generator (RNG), and then modulated the original state sent from the source by the modulator. (b) The equivalent EB version of the protocol: Alice prepared a two-mode entangled state, one mode was measured to get the result k. The other state of the mode was sent to Bob.