Abstract Quantum repeater is an essential ingredient for quantum networks that link distant quantum modules such as quantum computers and sensors. Motivated by distributed quantum computing and communication, quantum repeaters that relay discrete-variable quantum information have been extensively studied; while continuous-variable (CV) quantum information underpins a variety of quantum sensing and communication application, a quantum-repeater architecture for genuine CV quantum information remains largely unexplored. This paper reports a CV quantum-repeater architecture based on CV quantum teleportation assisted by the Gottesman–Kitaev–Preskill code to significantly suppress the physical noise. The designed CV quantum-repeater architecture is shown to significantly improve the performance of entanglement-assisted communication, target detection based on quantum illumination and CV quantum key distribution, as three representative use cases for quantum communication and sensing.

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基于玻色子纠错和隐形传态的连续可变量子中继器：架构和应用

摘要 量子中继器是连接远距离量子模块（如量子计算机和传感器）的量子网络的重要组成部分。在分布式量子计算和通信的推动下，中继离散变量量子信息的量子中继器得到了广泛的研究；虽然连续变量 (CV) 量子信息支撑着各种量子传感和通信应用，但真正的 CV 量子信息的量子中继器架构在很大程度上仍未得到探索。本文报告了一种基于 CV 量子隐形传态的 CV 量子中继器架构，该架构由 Gottesman-Kitaev-Preskill 代码辅助，以显着抑制物理噪声。设计的 CV 量子中继器架构被证明可以显着提高纠缠辅助通信的性能，