发表机构
East China Normal University; Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area (Guangdong); Agency for Science, Technology and Research (A*STAR); Hefei National Laboratory; Chongqing Institute of East China Normal University; Shanxi University（华东师范大学; 粤港澳大湾区量子科学中心（广东）; 新加坡科技研究局; 合肥国家实验室; 华东师范大学重庆研究院; 山西大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究首次实现八光子半激发Dicke态，用于开放目的地隐形传态和量子远程克隆，在损耗条件下优于GHZ基准，确立了抗损耗量子网络架构。
AI 中文摘要
多体纠缠可以赋予量子网络经典技术无法实现的能力，然而在物理和信息访问逐渐减少的情况下，其演化在很大程度上仍未得到探索。在此，我们实现了首个八光子半激发Dicke态，保真度为0.922(11)，并利用它执行两个不同的网络任务：开放目的地隐形传态和量子远程克隆。一个未知态可以从一个代理传送到七个远程代理中的任意一个，保真度为0.926(7)-0.941(6)，同时七个近似克隆以0.713(3)的保真度分发，接近最优值5/7。该协议在不完美光子探测、传输损耗和参与代理信息缺失的情况下仍高于经典极限，并优于相应的GHZ基准。随着参与代理数量的减少，隐形传态保真度呈现阶梯式下降，其两个极端分别恢复开放目的地隐形传态和最优远程克隆，将两个任务连接在单一操作框架内。这些结果确立了Dicke纠缠作为抗损耗量子网络的一种有前景的架构，为在现实操作条件下保持有用功能的量子技术开辟了道路。
英文摘要
Multipartite entanglement can endow a quantum network with capabilities unavailable classically, yet their evolution under progressively reduced physical and informational access remains largely unexplored. Here we realize the first eight-photon half-excitation Dicke state, with a fidelity of 0.922(11), and use it to implement two distinct network tasks: open-destination teleportation and quantum telecloning. An unknown state can be teleported from one agent to any of seven remote agents with fidelities of 0.926(7)-0.941(6), while seven approximate clones are distributed with a fidelity of 0.713(3), close to the optimal value of 5/7. The protocol remains above the classical limit under imperfect photon detection, transmission loss and missing information from participating agents, and outperforms the corresponding GHZ benchmarks. As fewer agents contribute, the teleportation fidelity falls through a stepwise hierarchy whose two extremes recover open-destination teleportation and optimal telecloning, connecting both tasks within a single operational framework. These results establish Dicke entanglement as a promising architecture for loss-resilient quantum networks, opening a route towards quantum technologies that retain useful functionality under realistic operating conditions.
Comments2 pages, including 5 figures. Comments welcome!
