The comparison of secure key rate of bb84 protocol using single photon detectors and optical homodyne detectors

Abstract

To increase the security and efficiency of information transmission, the technology of Quantum Key Distribution is developed. A simulation of secure key rate of BB84 protocol is done to give a visualized comparison of efficiency of the protocol using different light sources and detectors. The simulation shows that the Poisson light source is less efficient than single photon source and the secure key rate of using continuous variable detectors is lower than using discrete variable detectors.