论文标题
高速离散调节连续变量量子键分配系统的实验证明
Experimental Demonstration of High-Rate Discrete-Modulated Continuous-Variable Quantum Key Distribution System
论文作者
论文摘要
实验研究了基于高阶离散调制的高率连续变量量子键分布（CV-QKD）系统。在新型系统方案，有效的数字信号处理算法和高级分析安全性方法的帮助下，对于1 GBAUD优化的量子信号，可实现5 km，10 km，25 km和50 km的传输结果。 Correspondingly, the asymptotic secret key rate (SKR) is 288.421 Mbps, 159.395 Mbps, 50.004 Mbps and 7.579 Mbps for discrete Gaussian (DG) 64QAM, and 326.708 Mbps, 179.348 Mbps, 50.623 Mbps and 9.212 Mbps for DG 256QAM.在相同的参数下，DG 256QAM的SKR与理想的高斯调制几乎相同。在这种情况下，所证明的高速离散调制的CV-QKD系统具有数十公里以下的高速安全通信的应用潜力。
A high-rate continuous-variable quantum key distribution (CV-QKD) system based on high-order discrete modulation is experimentally investigated. With the help of the novel system scheme, effective digital signal processing algorithms and advanced analytical security proof method, the transmission results of 5 km, 10 km, 25 km, and 50 km are achieved for the 1 GBaud optimized quantum signals. Correspondingly, the asymptotic secret key rate (SKR) is 288.421 Mbps, 159.395 Mbps, 50.004 Mbps and 7.579 Mbps for discrete Gaussian (DG) 64QAM, and 326.708 Mbps, 179.348 Mbps, 50.623 Mbps and 9.212 Mbps for DG 256QAM. Under the same parameters, the achieved SKRs of DG 256QAM is almost same to ideal Gaussian modulation. In this case, the demonstrated high-rate discrete modulated CV-QKD system has the application potential for high speed security communication under tens of kilometers.
