Core Viewpoint - The research teams from Shanghai Jiao Tong University and Shanghai University of Electric Power have made significant advancements in quantum direct communication, proposing a scalable architecture for long-distance quantum direct communication and successfully establishing a 300-kilometer quantum direct communication network among four nodes [1][2]. Group 1: Research Achievements - The quantum direct communication theory was first introduced in 2000 by teams from Tsinghua University and Beijing Quantum Information Science Research Institute, with subsequent experimental validations by various institutions [1]. - In 2021, the Shanghai Jiao Tong University team achieved a 40-kilometer quantum direct communication network involving 15 nodes, laying a solid foundation for further advancements [2]. - The recent study utilized a dual-pump optical parametric down-conversion technique to create a quantum entanglement distribution system with high anti-interference capability, maintaining a quantum state fidelity of over 85% after communication [2]. Group 2: Technical Breakthroughs - The research achieved three main technical breakthroughs: overcoming the limitations of traditional star network architecture to enable scalable full connectivity, enhancing transmission distance to 300 kilometers through optimized entangled light source preparation, and establishing an error correction mechanism based on quantum state reconstruction to ensure multi-node communication stability [2]. - After a 300-kilometer transmission, the photon pair count at the receiving node remained at 300-400 Hz, indicating a theoretical communication rate of several bits per second after encoding [2]. Group 3: Future Applications - The successful construction of this quantum communication network system lays a crucial foundation for practical applications in fields requiring high information security, such as military command, government communication, and financial transactions [3].

必读要闻一：300公里全连接，中国量子直接通信领域有新突破 据报道，中国科研团队创新提出长距离大规模可扩展全连接量子直接通信理论架构，并成功实现四节点 间300公里级量子直接通信网络，相关研究成果发表于《科学通报》（Science Bulletin）。实验结果显 示，通信后各节点间共享量子态保真度仍保持在85%以上，验证了该方案在长距离通信中的可靠性。经 300公里传输后到达接受节点的光子对数仍达300~400Hz（赫兹），这意味着经过编码后，理论通信速 率可达每秒数比特。 上海证券认为，量子计算已成为大国科技竞争的核心领域，海外科技巨头IBM、谷歌等在超导路线持续 突破，微软另辟拓扑蹊径，而中国在量子计算多路径探索中占据重要地位，中国量子计算产业发展潜力 巨大。根据ICVTA&K及光子盒研究院数据，2024年全球量子产业规模为50亿美元，预计到2035年产业 规模超过8000亿美元，CAGR为59%；2035年上游市场规模为2527亿美元。 必读要闻二：机构称本轮全球模拟芯片全球库存周期已基本触底 媒体报道，近日南方科技大学深港微电子学院呼唤助理教授课题组在应用于物联网、可穿戴系统、下一 代生物医疗等多个关 ...