带有集成光子学的大型量子通信网络
Yun Zheng1, Hanyu Wang2, Xinyu Jia2,3
1State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing, China. zhengyun96@pku.edu.cn.
Nature
|February 11, 2026
概括
这项研究展示了一个可扩展的集成光学量子密钥分配 (QKD) 网络. 这种新的系统使长距离的安全通信成为可能,为大型量子网络铺平了道路.
科学领域:
- 量子通信和密码学 量子通信和密码学
- 综合光子学 综合光子学
- 量子网络是一个量子网络.
背景情况:
- 量子密钥分布 (QKD) 提供了可证明的安全通信,但在扩展到大型网络和长距离时面临挑战.
- 现有的QKD网络架构,如可信节点和点对多点系统,在中介和距离方面存在局限性.
- 双场量子密钥分布 (TF-QKD) 增强了通信距离,但需要可扩展的量子设备来实现网络.
研究的目的:
- 展示一个可扩展和可靠的集成光学TF-QKD网络.
- 克服现有的QKD网络在规模和距离方面的局限性.
- 建立一个可行的途径,以大规模的量子网络,使用大规模生产的组件.
主要方法:
- 开发了一个集成光学TF-QKD网络,其中包含20个客户端QKD发射器芯片和一个服务器端光学微组芯片.
- 使用微来产生超低噪声连贯频率,作为客户端芯片的种子和参考.
- 在20个客户端芯片中使用10个波长复合通道对对实施QKD,实现相锁和密钥准备.
主要成果:
- 实现了3,700公里的网络能力 (客户端对 × 通信距离),单个链接超过了无重复器在370公里的螺旋纤维上.
- 证明了服务器端微组合芯片和客户端QKD发射器芯片的晶圆尺度可重现性.
- 展示了集成光学TF-QKD网络的特殊可扩展性和可靠性.
结论:
- 集成光学TF-QKD网络为远距离量子通信提供了可扩展和可靠的解决方案.
- 集成光子学的批量制造性,成本效益和高可扩展性的结合对于实现大规模量子网络至关重要.
- 这种原理证明演示代表了朝着实际,大规模量子网络部署迈出的重要一步.
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