我国量子科技研究取得新突破

Core Viewpoint - The research team led by Academician Pan Jianwei from the University of Science and Technology of China has achieved significant breakthroughs in quantum networking, including the first scalable quantum relay module and the ability to distribute device-independent quantum keys over distances exceeding 100 kilometers [1][5][6]. Group 1: Quantum Relay Technology - The ultimate goal of quantum information science is to construct efficient and secure quantum networks, which rely on long-distance deterministic quantum entanglement distribution [4]. - The challenge of signal attenuation in optical fibers has been a major barrier to long-distance quantum entanglement distribution, which the team addressed through the development of "quantum relay" technology [4]. - The team successfully created a basic module for scalable quantum relays, enabling the effective connection of entangled segments over long distances, thus making long-distance quantum networks a feasible reality [4][6]. Group 2: Device-Independent Quantum Key Distribution - The research team made advancements in device-independent quantum key distribution, which is crucial for the security of quantum communication [5]. - Previously, the maximum transmission distance for this technology was only a few hundred meters, but the team has now achieved over 100 kilometers using quantum relay technology [5]. - This breakthrough ensures that even if the quantum devices are completely untrustworthy, the generated keys remain secure, enhancing the overall security of quantum communication systems [5]. Group 3: Future Implications - These technological breakthroughs solidify China's international leadership in quantum technology and lay the groundwork for the future construction of a quantum internet [6]. - Academician Pan Jianwei indicated that with an additional 10 to 15 years of effort, a universal quantum computer could connect all quantum computers into a network, transforming the concept of a quantum internet into reality [6]. - This development would revolutionize the way information is perceived and understood in the material world, providing a revolutionary means to comprehend the universe [6].