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. Continuousvariable 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 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.
Cite
@article{arxiv.2404.10256,
title = {High-speed quantum radio-frequency-over-light communication},
author = {Shaocong Liang and Jialin Cheng and Jiliang Qin and Jiatong Li and Yi Shi and Zhihui Yan and Xiaojun Jia and Changde Xie and Kunchi Peng},
journal= {arXiv preprint arXiv:2404.10256},
year = {2024}
}