The generation of high-fidelity distributed multi-qubit entanglement is a challenging task for large-scale quantum communication and computational networks^1,2,3,4. The deterministic entanglement of two remote qubits has recently been demonstrated with both photons^5,6,7,8,9,10 and phonons¹¹. However, the deterministic generation and transmission of multi-qubit entanglement has not been demonstrated, primarily owing to limited state-transfer fidelities. Here we report a quantum network comprising two superconducting quantum nodes connected by a one-metre-long superconducting coaxial cable, where each node includes three interconnected qubits. By directly connecting the cable to one qubit in each node, we transfer quantum states between the nodes with a process fidelity of 0.911 ± 0.008. We also prepare a three-qubit Greenberger–Horne–Zeilinger (GHZ) state^12,13,14 in one node and deterministically transfer this state to the other node, with a transferred-state fidelity of 0.656 ± 0.014. We further use this system to deterministically generate a globally distributed two-node, six-qubit GHZ state with a state fidelity of 0.722 ± 0.021. The GHZ state fidelities are clearly above the threshold of 1/2 for genuine multipartite entanglement¹⁵, showing that this architecture can be used to coherently link together multiple superconducting quantum processors, providing a modular approach for building large-scale quantum computers^16,17.

生成高保真分布式多量子比特纠缠对于大规模量子通信和计算网络^1,2,3,4来说是一项具有挑战性的任务。最近用光子^{5、6、7、8、9、10}和声子^{11证明了两个远程量子位的确定性纠缠}. 然而，多量子比特纠缠的确定性产生和传输尚未得到证实，这主要是由于有限的状态转移保真度。在这里，我们报告了一个量子网络，该网络包含两个超导量子节点，这些节点通过一米长的超导同轴电缆连接，其中每个节点包括三个互连的量子位。通过将电缆直接连接到每个节点中的一个量子位，我们以 0.911 ± 0.008 的过程保真度在节点之间传输量子态。我们还准备了一个三量子位的 Greenberger–Horne–Zeilinger (GHZ) 态^12,13,14在一个节点中，并确定性地将此状态传输到另一个节点，传输状态保真度为 0.656 ± 0.014。我们进一步使用该系统确定性地生成全局分布的双节点、六量子位 GHZ 状态，状态保真度为 0.722 ± 0.021。GHZ 状态保真度明显高于真正多部分纠缠¹⁵的 1/2 阈值，表明该架构可用于将多个超导量子处理器相干地链接在一起，为构建大型量子计算机^16,17提供模块化方法。