首次！量子科技再获里程碑式重大突破

Core Viewpoint - The research team from the University of Science and Technology of China has achieved significant breakthroughs in quantum communication technology, including the construction of a scalable quantum relay module and the successful transmission of device-independent quantum key distribution (DI-QKD) over distances exceeding 100 kilometers, marking a major step towards practical applications in quantum networks [1][2]. Group 1 - The research team developed long-lived trapped ion quantum memory, high-efficiency ion-photon communication interfaces, and high-fidelity single-photon entanglement protocols, achieving long-lived quantum entanglement with a lifetime of 550 milliseconds, which significantly exceeds the 450 milliseconds required to establish the entanglement [2][3]. - The successful construction of the scalable quantum relay module enables the realization of long-distance quantum networks, making it a feasible possibility [2][3]. - The distance for device-independent quantum key distribution has been improved by more than two orders of magnitude compared to the previous best international experimental level, showcasing the advancements in this field [2][3]. Group 2 - Academician Pan Jianwei stated that these breakthroughs represent another milestone achievement for China following the "Mozi" quantum satellite, indicating that fiber-based quantum networks are transitioning from theoretical concepts to practical possibilities [2][3]. - This progress further enhances China's international leading position in the field of quantum technology [2][3].