Core Viewpoint - The article discusses the advancements in quantum networking, particularly focusing on the development of quantum repeaters that enable long-distance, reliable quantum entanglement distribution, which is essential for scalable quantum networks [3][5]. Group 1: Quantum Networking and Challenges - Quantum networks aim to achieve secure and efficient information transmission, high-resolution sensing, and exponential increases in information processing speed [3][5]. - A significant challenge in establishing long-distance quantum networks is the exponential loss of photons in optical fibers, which hinders the efficient distribution of entanglement [3][5]. Group 2: Quantum Repeaters and Technological Advances - Quantum repeaters combine entanglement swapping, entanglement purification, and quantum storage technologies to address the issues of fiber loss and decoherence [5][6]. - The recent research achieved entanglement between memory nodes over a distance of 10 kilometers, with the entanglement duration exceeding the average time required to establish it, marking a critical milestone [5][6]. Group 3: Key Innovations - The breakthrough was made possible through three technological advancements: long-lived trapped ion storage, efficient telecom-band interfaces for quantum information transfer, and high-visibility single-photon entanglement protocols [6]. - These innovations significantly enhance the efficiency and reliability of establishing quantum entanglement [6]. Group 4: Practical Applications and Future Implications - The research team demonstrated a principle of device-independent quantum key distribution over a distance of 10 kilometers, achieving a positive key rate at an asymptotic limit of 101 kilometers, which is a two orders of magnitude improvement over previous studies [7]. - This research provides a crucial building block for quantum repeaters and represents a significant step towards the development of scalable quantum networks, akin to paving a longer "main road" for the future "quantum internet" [7].

来源：光明日报 本报北京2月2日电（记者崔兴毅） 就像为一段混乱的进程找到慢放键，中国科学家在量子世界实现了一项关键控制。中国科学院物理研究 所与北京大学的联合科研团队在国际上首次利用超导量子芯片，实验观测并人工调控量子多体系统走向 混沌前的关键中间状态——"预热化"平台。这一发现为理解并控制复杂的量子动力学过程打开了新窗 口，相关成果日前在线发表于国际学术期刊《自然》。 在量子世界中，系统在外部驱动下通常会逐步丢失初始信息，最终达到混乱的热平衡状态，该过程被称 为"热化"。然而，实验揭示，在完全热化之前，系统会经历一个反直觉的、相对稳定的"预热化"平台 期。这类似于给冰加热——在冰完全融化成水之前，温度会长时间稳定在0摄氏度。在预热化阶段，量 子系统虽受驱动，但信息扩散被抑制，有序性得以短暂保持。 研究团队在集成78个量子比特的超导量子处理器"庄子2.0"上完成这项实验。他们采用一种名为"随机多 极驱动"的特殊序列对系统进行精确操控。该驱动方式基于非周期的数学序列，通过调节序列的阶数与 周期，研究人员如同掌握不同的"加热节奏"，成功实现对预热化平台持续时间的主动调控。当平台期结 束后，系统内部纠缠度急剧增长 ...

Core Viewpoint - The company, GuoDun Quantum, reported impressive half-year results following its acquisition by China Telecom Quantum Information Technology Group, showing significant revenue growth and reduced losses in the first half of 2025 [1][2]. Financial Performance - GuoDun Quantum achieved a revenue of 121 million yuan, representing a year-on-year increase of 74.54% [1] - The net profit was reported at -23.79 million yuan, indicating a reduction in losses compared to the previous year [1] - Research and development investment reached 55.17 million yuan, up 33.77% year-on-year, accounting for 45.46% of total revenue [1] Business Segments - The quantum computing segment saw the most significant growth, with revenue of 55.96 million yuan, a year-on-year increase of 283.92% [1] - The quantum communication segment generated revenue of 51.74 million yuan, reflecting a growth of 28.1% [1] - The quantum measurement segment reported revenue of 8.57 million yuan, with a year-on-year increase of 13.75% [1] Strategic Developments - GuoDun Quantum participated as the sole enterprise in the "Zu Chongzhi No. 3" project, which set a world record for "quantum computing superiority" [1] - The company provided a 200-qubit superconducting quantum computer for the Hefei Advanced Computing Center and completed the construction and trial operation of the "Chao Hu Ming Yue" project [2] - An international breakthrough was achieved with the planned delivery of a 25-qubit superconducting quantum computer to overseas clients [2] Application and Services - The company is actively exploring applications in meteorological forecasting and financial analysis in collaboration with strategic partners [2] - GuoDun Quantum's quantum communication services have shown steady growth, participating in a 12,000 km star-ground quantum communication experiment [2] - The quantum secure communication platform has over 5 million users, with the capacity to support over 10 million users [2] Measurement Business - The quantum measurement segment is expanding its applications in research and industrial fields, with cold atom gravimeter products delivered to clients [3] - The company has ongoing orders for additional gravimeter units, indicating a strong demand in geological surveying and disaster prevention [3] Related Transactions - GuoDun Quantum plans to sign a service contract with China Telecom Quantum Technology Co., providing specialized technical services for its quantum secure communication business, estimated at 14 million yuan [3] - A framework agreement is also in the works with China Telecom Quantum Group for the sale of quantum key distribution hardware and software, with an estimated value of 76.54 million yuan [3]