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    Architecture for a quantum repeater based on Rydberg-atom quantum processors

    Yan-Lei Zhang1,2,*, Qing-Xuan Jie1,2,*, Ming Li1,2,3, Shu-Hao Wu1,2, Zhu-Bo Wang1,2, Xu-Bo Zou1,2,3, Peng-Fei Zhang4,5, Gang Li4,5,†, Tiancai Zhang4,5 et al.

    Guang-Can Guo1,2,3 and Chang-Ling Zou1,2,3,‡

    • *These authors contributed equally.
    • †Contact author: gangli@sxu.edu.cn
    • ‡Contact author: clzou321@ustc.edu.cn

    Phys. Rev. Applied 24, 024052 – Published 21 August, 2025

    DOI: https://doi.org/10.1103/8rss-rqr2

    Abstract

    Realizing large-scale quantum networks requires the generation of high-fidelity quantum entanglement states between remote quantum nodes, a key resource for quantum communication, distributed computation, and sensing applications. However, entanglement distribution between quantum network nodes is hindered by optical transmission loss and local operation errors. Here, we propose a quantum repeater architecture that synergistically integrates Rydberg-atom quantum processors with optical cavities to overcome these challenges. Our scheme leverages cavity-mediated interactions for efficient remote entanglement generation followed by Rydberg-interaction-based entanglement purification and swapping. Numerical simulations, incorporating realistic experimental parameters, demonstrate the generation of Bell states with 99% fidelity at rates of 1.1 kHz between two nodes in a local-area network (distance 0.1km), and can be extended to metropolitan-area (25km) or intercity (250km, with the assistance of frequency converters) networks with a rate of 0.1 kHz. This scalable approach opens up near-term opportunities for exploring quantum network applications and investigating the advantages of distributed quantum information processing.

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