The distribution of entangled states across the nodes of a future quantum internet will unlock fundamentally new technologies. Here, we report on the realization of a three-node entanglement-based quantum network. We combine remote quantum nodes based on diamond communication qubits into a scalable phase-stabilized architecture, supplemented with a robust memory qubit and local quantum logic. In addition, we achieve real-time communication and feed-forward gate operations across the network. We demonstrate two quantum network protocols without postselection: the distribution of genuine multipartite entangled states across the three nodes and entanglement swapping through an intermediary node. Our work establishes a key platform for exploring, testing, and developing multinode quantum network protocols and a quantum network control stack.

纠缠态在未来量子互联网节点之间的分布将从根本上解锁新技术。在这里，我们报告基于三节点纠缠的量子网络的实现。我们将基于钻石通信量子位的远程量子节点组合成可扩展的相位稳定架构，并辅以强大的存储量子位和局部量子逻辑。此外，我们还可以跨网络实现实时通信和前馈门操作。我们演示了两个没有后选择的量子网络协议：三个节点上真正的多部分纠缠态的分布以及通过中间节点的纠缠交换。我们的工作为探索，测试和开发多节点量子网络协议和量子网络控制堆栈建立了一个关键平台。