深圳国际量子研究院联合清华团队，首次在超导量子芯片间实现64米远距离量子隐形传态，保真度达78.3%，并完成跨芯片 CNOT门传送，突破分布式量子计算关键瓶颈。 关联内容 让机器人更像人，帕西尼造具身智能"数据粮仓" 在科幻作品中，瞬间移动或隔空传物是令人神往的超能力。如今，在微观的量子世界，这一神话正一步步走向现实。 量子计算机被誉为下一代信息技术的"圣杯"，而超导量子比特是目前实现大规模量子计算最有前景的物理系统之一。 然而，随着芯片上集成的量子比特数量不断增加，技术挑战也日益严峻，如同在单个孤岛上无限扩张总会遇到瓶颈。分布式量 子计算网络，即将多个量子处理器通过量子通道连接起来协同工作，被视为突破单芯片算力极限、构建大规模量子系统的可行 路径。 实现分布式计算的核心，是让不同芯片上的量子比特能够进行高质量的对话与协作，而量子隐形传态正是实现这种对话的关键 通信技术。它利用奇妙的量子纠缠现象，能够将某个粒子的未知量子态信息瞬间传输到遥远地点的另一个粒子上，而无需传递 物质实体本身。 尽管该技术此前已在光子、离子阱等系统中实现，但在更具实用潜力的超导量子电路中，受限于芯片间互联性能，实验演示一 直局限于单芯 ...

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 development of a quantum internet represents a significant advancement in technology, potentially revolutionizing how information is exchanged and processed in the future [1][3][10] - Quantum internet will not replace the current internet but will serve as a complementary system, addressing many existing issues such as security vulnerabilities [3][5] Group 1: Quantum Internet Development - In February 2020, researchers achieved quantum entanglement in a 52-mile quantum ring network, marking a crucial step towards a more powerful internet [1] - Quantum bits (qubits) will enable the quantum internet to offer greater bandwidth and connect powerful quantum computers, facilitating large-scale applications that are currently unfeasible [1][3] Group 2: Security and Communication - Quantum internet promises enhanced security against hacking and cybercrime, as quantum information transmitted via photons is immune to interception [5] - Unlike traditional encryption methods that rely on mathematical complexity, quantum communication is based on the principles of quantum physics, making it inherently more secure [5] Group 3: Potential Applications - Once fully realized, the quantum internet could achieve speeds significantly faster than current technology, improving GPS accuracy and enabling detailed gravitational field mapping [8] - It could facilitate the creation of a global network of super-powerful quantum computers, allowing for complex simulations and advancements in drug development and understanding of molecular behavior [8] Group 4: Challenges Ahead - Significant challenges remain in constructing a quantum internet, including the need for new hardware and the difficulty of maintaining quantum information without degradation [10] - Current quantum systems often require extremely low temperatures or vacuum environments to function, complicating the development process [10] - Predictions suggest that a fully operational quantum internet could be realized as early as 2030, according to some researchers [10]