On February 11, 2026, the research group, together with Professor Wang Jianwei and Professor Gong Qihuang's group from the Institute of Modern Optics, School of Physics, Peking University, published groundbreaking research results entitled "Large-scale quantum communication networks with integrated photonics" in Nature. The research team successfully developed a fully integrated optical microcavity frequency comb light source chip and a high-performance quantum key distribution chip, and based on this, constructed the world's first large-scale quantum key distribution network based on integrated photonics chips—"Weiming Quantum Chip Network". This network includes 20 user quantum chip nodes and 1 server chip node, with a total communication distance of 3700 kilometers, achieving international leading levels in both chip user scale and spatial span. The research also further verified the superiority of the silicon nitride and indium phosphide material system in the fabrication of photonics chips, possessing high yield, high performance, and strong scalability characteristics at the wafer-level processing level, laying the technological foundation for low-cost, large-scale fabrication. This breakthrough provides a solid chip-level solution for building practical quantum secure communication networks that can cover longer distances, accommodate more users, and support larger scales in the future.

Link: https://www.nature.com/articles/s41586-026-10152-z