全球首个！我国科研人员取得重大进展

Core Viewpoint - The article highlights the successful construction of the world's first large-scale quantum key distribution network based on integrated optical quantum chips, named "Weiming Quantum Chip Network," by a research team from Peking University. This achievement marks a significant step towards practical and scalable quantum communication [1][2]. Group 1: Quantum Key Distribution Chips - The research team developed two core chips essential for the quantum communication system: one is a server-side optical microcavity frequency comb light source chip that generates ultra-low noise coherent light, providing a unified frequency reference for user communication synchronization [1]. - The second chip is a user-side quantum key sending chip that integrates all critical functions such as laser, modulator, and key encoding/decoding, achieving full functionality in a single unit [1]. Group 2: Weiming Quantum Chip Network - The "Weiming Quantum Chip Network" addresses previous challenges in quantum communication networks, such as limited users, short distances, and complex equipment. It supports simultaneous communication for 20 chip users, with a communication distance of up to 370 kilometers between any two users [2]. - The network breaks the technical limitations of non-relay communication, achieving a networking capability of 3,700 kilometers, thus making a significant breakthrough in multi-user, long-distance quantum communication [2]. - The optical quantum chips developed by the team exhibit high uniformity and yield in wafer-level fabrication, indicating potential for low-cost mass production, which is crucial for building large-scale quantum communication networks [2].