近日，上海交通大学陈险峰团队研究了基于多用户纠缠交换的独立网络量子融合。相关论文于2025年11月4日发表在《自然—光子学》杂志上。

随着量子科学的深入发展，构建大规模量子网络已成为未来量子信息技术的一个突出领域。未来的量子网络有望实现广泛的突破性应用，并在信息安全和大规模计算方面开启根本性的新技术。未来的量子互联网需要连接量子信息处理器，以实现无与伦比的秘密通信能力，并实现地球上任意两点之间的量子通信。然而，现有的量子网络主要是为了促进终端主体在各自网络内的通信而设计的。桥接不同的独立网络，形成一个完全连接的量子互联网，已成为未来量子通信系统面临的紧迫挑战。

研究组展示了基于多用户纠缠交换的量子网络融合方案，成功将两个10用户网络合并为具有18个量子关联节点的大型网络。通过对两个非相邻节点执行贝尔态测量，不同网络的用户能够建立纠缠关联，使得全部18个用户最终可利用交换后的量子态实现互联通信。这项研究为跨网络远程节点间建立量子纠缠开辟了新路径，不仅能支撑多功能量子信息互联，更为实现大规模城际量子通信网络构建提供了关键技术支撑。

附：英文原文

Title: Quantum fusion of independent networks based on multi-user entanglement swapping

Author: Huang, Yiwen, Yang, Yilin, Li, Hao, Wang, Jiayu, Qiu, Jing, Qi, Zhantong, Zhang, Yuting, Li, Yuanhua, Zheng, Yuanlin, Chen, Xianfeng

Issue&Volume: 2025-11-04

Abstract: With the advanced development of quantum science, constructing a large-scale quantum network has become a prominent area in the future of quantum information technology. Future quantum networks promise to enable a wide range of groundbreaking applications and to unlock fundamentally new technologies in information security and large-scale computation. The future quantum internet is required to connect quantum information processors to achieve unparalleled capabilities in secret communication and enable quantum communication between any two points on Earth. However, existing quantum networks are primarily designed to facilitate communication between end users within their own networks. Bridging different independent networks to form a fully connected quantum internet has become a pressing challenge for future quantum communication systems. Here we demonstrate the quantum fusion of two independent networks based on multi-user entanglement swapping, to merge two 10-user networks into a larger network with 18 users in a quantum correlation layer. By performing Bell state measurements between two non-neighbouring nodes, users from different networks can establish entanglement, allowing all 18 users to ultimately communicate with each other using the swapped states. Our approach opens up promising opportunities for establishing quantum entanglement between remote nodes across different networks, facilitating versatile quantum information interconnects and enabling the construction of large-scale intercity quantum communication networks.

DOI: 10.1038/s41566-025-01792-0

Source: https://www.nature.com/articles/s41566-025-01792-0