论文标题
亚Mbps键速率连续变量可变量键分布，局部本位振荡器超过100 km纤维
Sub-Mbps key-rate continuous-variable quantum key distribution with local-local-oscillator over 100 km fiber
论文作者
论文摘要
我们通过实验证明了超过100 km传输距离的次Mbps密钥速率高斯调制的连续变量量子键分布（CV-QKD）。为了有效控制多余的噪声，量子信号和飞行员音调基于宽频频率和极化多路复用方法在光纤通道中共传递。此外，仔细设计了高临界数据辅助时域均衡算法，以补偿低信噪比的相位噪声和极化变化。在传播距离分别在50 km，75 km和100 km的传输距离上，实验评估所证明的CV-QKD的渐近安全键（SKR）分别为10.36 Mbps，2.59 Mbps和0.69 Mbps。与最先进的GMC CV-QKD实验结果相比，实验证明了CV-QKD系统可显着提高传输距离和SKR，并显示了长距离和高速安全量子键分布的潜力。
We experimentally demonstrated a sub-Mbps key rate Gaussian-modulated coherent-state continuous-variable quantum key distribution (CV-QKD) over 100 km transmission distance. To efficiently control the excess noise, the quantum signal and the pilot tone are co-transmitted in fiber channel based on wide-band frequency and polarization multiplexing methods. Furthermore, a high-accuracy data-assisted time domain equalization algorithm is carefully designed to compensate the phase noise and polarization variation in low signal-to-noise ratio. The asymptotic secure key rate (SKR) of the demonstrated CV-QKD is experimentally evaluated to be 10.36 Mbps, 2.59 Mbps, and 0.69 Mbps over transmission distance of 50 km, 75 km, and 100 km, respectively. The experimental demonstrated CV-QKD system significantly improves transmission distance and SKR compared to the state-of-art GMCS CV-QKD experimental results, and shows the potential for long-distance and high-speed secure quantum key distribution.
