Performances Analysis of An Intrinsic Random Quantum Key Distribution Scheme with Imperfect Optical Devices

Abstract Within an imperfect devices scenario, we focus on investigating the performances of an intrinsic random quantum key distribution scheme. We first derived the formula of the security bound for this scheme when a parametric down-conversion source and threshold detectors in lossy channels are employed, and then, the simulation result is presented by employing practical parameters that are deduced from two well-known experiments. The result we obtained is interesting for adjusting and optimizing performances of the real quantum key distribution setups as the devices-model and the corresponding parameters are practicable with todays’ state-of-the-art.