High-Speed Quantum Radio-Frequency-Over-Light Communication
Shaocong Liang, Jialin Cheng, Jiliang Qin, Jiatong Li, Yi Shi, Zhihui Yan, Xiaojun Jia, Changde Xie, Kunchi Peng
Abstract
Quantum dense coding (QDC) means to transmit two classical bits by only transferring one quantum bit, which has enabled high-capacity information transmission and strengthened system security. Continuous-variable QDC offers a promising solution to increase communication rates while achieving seamless integration with classical communication systems. Here, we propose and experimentally demonstrate a high-speed quantum radio-frequency-over-light (RFOL) communication scheme based on QDC with an entangled state, and achieve a practical rate of 20 Mbps through digital modulation and RFOL communication. This scheme bridges the gap between quantum technology and real-world communication systems, which bring QDC closer to practical applications and offer prospects for further enhancement of metropolitan communication networks.