A Universal Quantum Key Distribution Simulation Method Towards Future Internet

Quantum Key Distribution (QKD) technology is developing at a rapid pace, it may be the key supporting technology of the space ground integrated internet. To conduct a long distance QKD experiment is really difficult, it needs not only a lot of manpower, material resources, heavy workload, but also big and continuous financial support. However, there is not any simulation method for the quantum and classical integrated networks. In this paper, we propose a simulation method for the physical subsystem of quantum communication network. In this method, we establish mathematical models for physical devices and quantum channels, so that we can calculate the loss and efficiency of different modules according to the parameters of the actual equipment, and finally get the simulation data close to the output of the real physical equipment. Therefore, the simulation method is applicable to different quantum communication networks. Unlike previous theoretical based studies, we can get simulated output, and our simulated results can be used as the raw key