量子密钥分配
光学
调制(音乐)
计算机科学
量子密码学
钥匙(锁)
量子信道
电信
电子工程
物理
量子
量子信息
量子力学
光子
计算机安全
声学
工程类
作者
Yan Tian,Yu Zhang,Shuaishuai Liu,Pu Wang,Zhenguo Lu,Xuyang Wang,Yongmin Li
出处
期刊:Optics Letters
[Optica Publishing Group]
日期:2023-04-27
卷期号:48 (11): 2953-2953
被引量:23
摘要
We experimentally demonstrate a high-rate discretely modulated continuous-variable quantum key distribution over 80-km standard single-mode fiber with a 2.5 Gbaud, 16-symbol, two-ring constellation. With the help of well-designed digital signal processing algorithms, the excess noise of the system can be effectively suppressed. The achieved secret key rates are 49.02 Mbits/s, 11.86 Mbits/s, and 2.11 Mbits/s over 25-km, 50-km, and 80-km optical fiber, respectively, and achieve 67.4%, 70.0%, and 66.5% of the secret key rate performance of a Gaussian-modulated protocol. Our work shows that it is feasible to build a high-performance, long-distance continuous-variable quantum key distribution system with only a small constellation size.
科研通智能强力驱动
Strongly Powered by AbleSci AI