局域网中量子密码的理论和实验研究

Based on the non-classical properties only held by quantum mechanics,quantum information have an advantage of the classical one. And it has become one of promising research in rencent years. Under the powerful support of this foundation, we have made an in-depth study of quantum information, espexially in quantum communication, and obtained some important theoretical and experimental achievement. In theory, we have done a helpful research on some basic and advanced subjects in quantum communication, proposed some new schemes on quantum cryptography, quantum teleportation, entanglement purification, and non-demolition dicrimination on even-partite GHZ states. In experiment, we have developed the generation of entangled photon-pair pumped by ultra-short pulsed laser, prepared photon-pairs entangled in momentum, time, and polarization. And the non-classical correlation of quantum mechanics is demonstrated by bi-photon interference. The execution of this project have brought up some valuable experience a few competitive researcher, and it have established a good ground for further reseach on realization of quantum communication.

随着计算工具和计算方法的不断发展，经典密码的安全性逐步受到越来越严惩的威胁。量子密码作为原则上可以实现绝对安全的保密通信体系，已在国际上成为研究热点。本项目研究量子密码在局域网中应用的理论模型，提出具有简单实用化的实验方案，在实验中实现量子密钥在局域网中的传输，为量子密码的实用化打下基础。