AI 中文总结
研究多用户多协议量子网络的动态纠缠分发，利用q-ROADM构建城域量子通信网络，支持多种配置，展示长时间稳定全连接操作，比较不同策略，实现量子网络切片，还能支持不同协议，为可重构量子网络提供新途径。
AI 中文摘要
动态纠缠分发是可扩展的多用户和多协议量子网络的关键需求。我们展示了一个基于纠缠的城域规模量子通信网络，它由量子可重构光分插复用器（q-ROADM）实现，能将宽带源的偏振纠缠光子对通过校园和城域光纤动态分发给六个用户。该网络支持可编程的全连接、部分连接和切片子网配置。我们展示了超过150小时的稳定六用户全连接操作，比较了不同源和探测器条件下的全连接和分时部分连接策略，实现了带可选/附加互连链路的量子网络切片。还表明同一基础设施可支持不同量子协议。这些结果证明了基于q-ROADM的纠缠分发架构是迈向基于光纤基础设施的可重构、面向服务的量子网络的新途径。
英文摘要
Dynamic entanglement distribution is a key requirement for scalable, multi-user and multi-protocol quantum networks. We demonstrate a metropolitan-scale entanglement-based quantum communication network enabled by a quantum reconfigurable optical add-drop multiplexer (q-ROADM), which dynamically distributes polarisation-entangled photon pairs from a broadband source to six users over deployed campus and metropolitan fibre. The network supports programmable full-mesh, partial-mesh and sliced sub-network configurations, enabling flexible allocation of entanglement resources according to link condition and service requirement. We demonstrate stable six-user full-mesh operation over more than 150 hours, compare full-mesh and time-shared partial-mesh strategies under different source and detector conditions, and realise quantum network slicing with optional/additional interconnection links. We also show that the same infrastructure can support different quantum protocols by showcasing Secure Inaugural Authentication-Transfer (SIAT) combined with Network flooding over multiple paths to improve the security of onboarding a new user. These results demonstrate a q-ROADM-enabled entanglement distribution architecture as a novel route towards reconfigurable, service-oriented quantum networking over optical fibre infrastructure.
