量子电子学报, 2008, 25 (6): 0712, 网络出版: 2010-06-07
四态偏振编码解码QKD系统的实验研究
Experiment research of quantum key distribution with four polarization states coding and decoding
量子信息 量子密钥分配 相位调制 偏振编码 琼斯矩阵 quantum information quantum key distribution phase modulation polarization coding Jones matrix
摘要
采用一个激光器通过偏振调制器快速偏振编码实现密钥分配,同时用矩阵分析的方法对系统原理进行了理论分析。指出用相位-偏振调制器可以对四种非正交偏振态光子进行编码和解码。在实验室内完成了30km光纤保密通信,误码率<6%。实验表明该系统可用一个激光器快速编码解码实现密钥分配,具有很高的实用价值。
Abstract
The quantum key distribution is discribed using fast polarization coding with polarization modulator and one laser. At the same time,the way of matrix analysis is used to study the process of the system. The results indicate that it is feasible to code and decode four non-orthogonal polarization states with phase-polarization modulator. The experiment of secret communication is successfully carried out based on 30 km fiber. The error rate is less than 6%.
张兵, 唐志列, 梁瑞生, 路轶群, 路巍, 刘颂豪. 四态偏振编码解码QKD系统的实验研究[J]. 量子电子学报, 2008, 25(6): 0712. ZHANG Bing, TANG Zhi-lie, LIANG Rui-sheng, LU Yi-qun, LU Wei, LIU Song-hao. Experiment research of quantum key distribution with four polarization states coding and decoding[J]. Chinese Journal of Quantum Electronics, 2008, 25(6): 0712.