Quantum teleportation can transfer an unknown quantum state between distant quantum nodes, which holds great promise in enabling large-scale quantum networks. To advance the full potential of quantum teleportation, quantum states must be faithfully transferred at a high rate over long distance. Despite recent impressive advances, a high-rate quantum teleportation system across metropolitan fiber networks is extremely desired. Here, we demonstrate a quantum teleportation system which transfers quantum states carried by independent photons at a rate of 7.1±0.4 Hz over 64-km-long fiber channel. An average single-photon fidelity of ⩾ 90.6±2.6% is achieved, which exceeds the maximum fidelity of 2/3 in classical regime. Our result marks an important milestone towards quantum networks and opens the door to exploring quantum entanglement based informatic applications for the future quantum internet.
@article{arxiv.2303.13866,
title = {Hertz-rate metropolitan quantum teleportation},
author = {Si Shen and Chenzhi Yuan and Zichang Zhang and Hao Yu and Ruiming Zhang and Chuanrong Yang and Hao Li and Zhen Wang and You Wang and Guangwei Deng and Haizhi Song and Lixing You and Yunru Fan and Guangcan Guo and Qiang Zhou},
journal= {arXiv preprint arXiv:2303.13866},
year = {2023}
}