北京大学科研团队实现首个大规模量子通信芯片网络

Core Insights - The research team from Peking University's School of Physics has published a groundbreaking study on large-scale quantum communication networks using integrated photonics in the journal "Nature" [1] Group 1: Research Achievements - The team developed a fully integrated high-performance quantum key sending chip and an optical microcavity frequency comb light source chip [1] - They constructed the world's first large-scale quantum key distribution network based on integrated photonic chips, named "Weiming Quantum Network" [1] - The quantum network supports parallel communication for 20 chip users, with a communication distance of 370 kilometers, breaking the relay limit [1] Group 2: Technical Advancements - The network's capability, defined as the number of client users multiplied by communication distance, reaches 3,700 kilometers, achieving international leadership in both user scale and networking capability [1] - The research validated the superiority of indium phosphide and silicon nitride material systems in the manufacturing of optical quantum chips, demonstrating high yield, performance, and scalability for wafer-level processing [1] - This breakthrough lays a solid chip-level foundation for the future construction of practical quantum secure communication networks that can cover longer distances and accommodate more users [1]