Scholarlink

<p>Quantum network and quantum repeater are promising ways to scale up a quantum information system. In a functional quantum network, it is required that the distribution rate of heralded remote entanglement should be higher than the decoherence rate of each local node. A promising scheme to accelerate the remote entanglement distribution is through multiplexing enhancement. In this work, we experimentally realize a multiplexed quantum network node based on a chain of <sup>40</sup>Ca<sup>+</sup> ions. We employ a hybrid multiplexing scheme in which maximally 44 time-bin modes are generated and sent through a long fiber to boost the entangling rate. Via this scheme, we can generate heralded ion-photon entanglement with a success rate of 4.28 s<sup>−1</sup> over a 12 km fiber. In addition, a dual-type framework is utilized to protect quantum information from the destructive ion-photon entangling attempts and a memory coherence time of 366 ms is achieved, which has exceeded the entanglement generation time.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Metropolitan-scale ion-photon entanglement via a quantum network node with hybrid multiplexing enhancements

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月6日

查看全文
  • Z.-B. Cui,
  • Z.-Q. Wang,
  • P.-C. Lai,
  • Y. Wang,
  • J.-X. Shi,
  • P.-Y. Liu,
  • Y.-D. Sun,
  • Z.-C. Tian,
  • Y.-B. Liang,
  • B.-X. Qi,
  • Y.-Y. Huang,
  • Z.-C. Zhou,
  • Y.-K. Wu,
  • Y. Xu,
  • L.-M. Duan,
  • Y.-F. Pu

摘要

Quantum network and quantum repeater are promising ways to scale up a quantum information system. In a functional quantum network, it is required that the distribution rate of heralded remote entanglement should be higher than the decoherence rate of each local node. A promising scheme to accelerate the remote entanglement distribution is through multiplexing enhancement. In this work, we experimentally realize a multiplexed quantum network node based on a chain of 40Ca+ ions. We employ a hybrid multiplexing scheme in which maximally 44 time-bin modes are generated and sent through a long fiber to boost the entangling rate. Via this scheme, we can generate heralded ion-photon entanglement with a success rate of 4.28 s−1 over a 12 km fiber. In addition, a dual-type framework is utilized to protect quantum information from the destructive ion-photon entangling attempts and a memory coherence time of 366 ms is achieved, which has exceeded the entanglement generation time.