研究团队通过发展长寿命囚禁离子量子存储器、高效率离子—光子通信接口及高保真度单光子纠缠协 议，首次实现长寿命量子纠缠，纠缠寿命显著超过纠缠建立所需的时间，成功构建可扩展量子中继的基 本模块，使远距离量子网络成为可能。此外，研究团队基于可扩展量子中继技术，实现两个铷原子间的 远距离高保真纠缠。在此基础上，他们首次将设备无关量子密钥分发的距离突破百公里，较国际此前最 好实验水平提升两个数量级以上，极大推进了该技术的实用化进程。 《 人民日报 》( 2026年02月14日 06 版) 本报合肥电 (记者徐靖)记者从中国科学技术大学获悉：该校潘建伟等人和多位业内专家合作，在可扩展 量子网络研究方面取得重大突破。相关成果发表于国际学术期刊《自然》和《科学》。 量子信息科学的目标是构建高效、安全的量子网络。构建量子网络的基本要素是远距离确定性量子纠缠 分发。但光纤的固有损耗导致量子纠缠的传输效率随距离呈指数级衰减，是构建可扩展量子网络面临的 最大挑战。例如，利用量子中继方案在光纤中进行距离为1000公里的纠缠分发，比直接在光纤中传输， 效率将提升100亿亿倍。然而，以往量子纠缠寿命远远短于产生纠缠所需时间，因此无法实现纠 ...

Investment Rating - The industry investment rating is "Positive" and maintained [7] Core Insights - Recent breakthroughs in scalable quantum networks by researchers from the University of Science and Technology of China have made long-distance quantum networks a realistic possibility. They achieved high-fidelity entanglement between single-atom nodes over long distances and successfully transmitted device-independent quantum key distribution (DI-QKD) over distances exceeding 100 kilometers, advancing the practical application of this technology [2][4][9] - The quantum communication industry in China is currently the largest globally, accounting for 25% of the market share, and is transitioning from demonstration projects to national infrastructure. The country has established the world's first and largest wide-area quantum backbone network, covering over 10,000 kilometers and 80 cities [9][4] - The recent advancements in quantum relay technology and DI-QKD mark a significant milestone for China's quantum communication sector, reinforcing its leading position and paving the way for the construction of a quantum internet [9][4] Summary by Sections Event Description - Researchers have constructed the basic module of a scalable quantum relay, enabling long-distance quantum networks. They achieved a significant milestone by extending the lifetime of quantum entanglement to 550 milliseconds, surpassing the time required to establish entanglement [4][9] Event Commentary - The successful implementation of high-fidelity entanglement over 11 kilometers and maintaining over 90% fidelity at 100 kilometers demonstrates the potential for practical quantum secure communication. This breakthrough is expected to accelerate the commercialization of quantum communication technologies [9][4]

Core Insights - The research team from the University of Science and Technology of China has achieved a significant breakthrough in scalable quantum network research by constructing the basic module of a scalable quantum relay, making long-distance quantum networks a realistic possibility [1][2] - They have successfully established long-lived quantum entanglement between single atomic nodes over long distances and have, for the first time, surpassed the 100-kilometer transmission distance for device-independent quantum key distribution, improving upon previous international experimental levels by more than two orders of magnitude [2] Group 1 - The ultimate goal of quantum information science is to build efficient and secure quantum networks, with the fundamental element being the distribution of long-distance deterministic quantum entanglement [1] - The inherent loss in optical fibers leads to an exponential decay in the efficiency of quantum entanglement transmission with distance, posing the greatest challenge in constructing scalable quantum networks [1] - The quantum relay scheme is an effective solution to address the transmission loss in optical fibers, potentially enhancing the efficiency of entanglement distribution over 1000 kilometers by 100 billion billion times compared to direct transmission [1] Group 2 - The research team developed long-lived trapped ion quantum memory, high-efficiency ion-photon communication interfaces, and high-fidelity single-photon entanglement protocols to achieve long-lived quantum entanglement, significantly exceeding the time required to establish entanglement [2] - The successful construction of the basic module for scalable quantum relays marks a transition from theoretical concepts to realistic possibilities for fiber-based quantum networks [3]

Core Insights - The research team from the University of Science and Technology of China has made significant breakthroughs in scalable quantum network research, constructing the basic module of a scalable quantum repeater for the first time internationally, making long-distance quantum networks a realistic possibility [1][2] - They achieved high-fidelity entanglement between single atom nodes over long distances and successfully extended the transmission distance of device-independent quantum key distribution beyond 100 kilometers, improving previous international experimental levels by more than two orders of magnitude [2] Group 1 - The ultimate goal of quantum information science is to build efficient and secure quantum networks, with long-distance deterministic quantum entanglement distribution as a fundamental element [1] - The inherent loss in optical fibers leads to an exponential decay in the efficiency of quantum entanglement transmission with distance, posing the greatest challenge in constructing scalable quantum networks [1] - The quantum repeater scheme is an effective solution to address the transmission loss in optical fibers, potentially enhancing the efficiency of entanglement distribution over 1000 kilometers by 10^20 times compared to direct transmission [1] Group 2 - 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 that significantly exceeds the time required to establish entanglement [2] - This breakthrough marks a transition from theoretical concepts of fiber-based quantum networks to realistic possibilities, indicating progress towards practical applications of quantum entanglement technology [3]

Core Insights - The article discusses the recent developments in the investment banking sector, highlighting key trends and shifts in market dynamics [2] Group 1: Industry Trends - Investment banking is experiencing a significant transformation due to technological advancements and changing client demands [2] - There is an increasing focus on sustainable finance, with more banks integrating ESG (Environmental, Social, and Governance) criteria into their investment strategies [2] Group 2: Company Developments - Major investment banks are reporting fluctuations in revenue, with some firms experiencing a decline of up to 20% in their trading divisions compared to the previous year [2] - Mergers and acquisitions activity has seen a resurgence, with a notable increase of 15% in deal volume in the last quarter [2]

Core Insights - The research team from the University of Science and Technology of China has achieved a significant breakthrough in scalable quantum network research by constructing the basic module of a scalable quantum relay, making long-distance quantum networks a realistic possibility [1][2] - They have successfully established long-lived quantum entanglement between single-atom nodes over long distances and have, for the first time, surpassed the 100-kilometer transmission distance for device-independent quantum key distribution [1][2] Group 1 - The ultimate goal of quantum information science is to build efficient and secure quantum networks, with long-distance deterministic quantum entanglement distribution being a fundamental element [1] - The inherent loss in optical fibers leads to an exponential decay in the efficiency of quantum entanglement transmission with distance, posing the greatest challenge in constructing scalable quantum networks [1] - The quantum relay scheme is an effective solution to address the transmission loss in optical fibers, enabling entanglement distribution over distances of 1,000 kilometers, which could enhance efficiency by 100 billion billion times compared to direct transmission [1] Group 2 - 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 that significantly exceeds the time required to establish entanglement [2] - The successful construction of the basic module for scalable quantum relays makes long-distance quantum networks feasible [2] - The breakthrough signifies that fiber-based quantum networks utilizing quantum entanglement are transitioning from theoretical concepts to practical possibilities [2]