记者17日从中国科学技术大学获悉，该校潘建伟、张强等科研人员与其他单位合作，通过混合集成 分布式反馈激光器与薄膜铌酸锂光子芯片，成功实现电泵浦片上集成高亮度偏振纠缠量子光源，向集成 化量子信息处理迈出重要一步。相关成果16日发表在《物理评论快报》上。 利用中国科学院半导体研究所牛智川研究员团队开发的780纳米波段分布式反馈激光器，结合济南 量子技术研究院的集成化双通道参量下转换薄膜铌酸锂光子芯片，研究团队实现了高效的自发参量下转 换以及片上偏振纠缠态制备，并通过直流或脉冲电信号泵浦，在室温下实现了超高亮度偏振纠缠光子对 产生，亮度达到4.5×1010对/秒/毫瓦，带宽达到73纳米。该亮度较此前基于氮化硅平台的电泵浦纠缠源 提升了6个数量级，带宽提升了1个数量级。 实验结果表明，该纠缠源在多个波长信道下保真度均大于96%，并具备宽带复用能力，器件尺寸仅 为15毫米×20毫米，展现出优异的集成度。该器件适用于波分复用的光纤网络量子密钥分发、基于卫星 的星地量子通信以及基于纠缠的量子精密测量等应用场景。 （原载于《科技日报》 2025-12-18 03版） 纠缠量子光源是量子信息科学的核心资源之一。传统纠缠光子源通 ...

Core Insights - The research team from the University of Science and Technology of China has successfully integrated a high-brightness polarization-entangled quantum light source on an electrically pumped chip, marking a significant step towards integrated quantum information processing [1] Group 1: Quantum Light Source Development - The entangled quantum light source is a core resource in quantum information science, traditionally requiring external laser pumps, which limits integration and scalability [1] - The new electrically pumped scheme allows for direct current injection on-chip, enhancing the integration and scalability of the entangled source [1] - The team achieved a brightness of 4.5×10^10 pairs/second/milliwatt and a bandwidth of 73 nanometers, significantly improving brightness by six orders of magnitude and bandwidth by one order compared to previous silicon-based sources [1] Group 2: Experimental Results and Applications - The entangled source demonstrated a fidelity greater than 96% across multiple wavelength channels and exhibits broadband multiplexing capabilities, with a compact device size of 15mm x 20mm [2] - This device is suitable for applications in wavelength division multiplexing for fiber network quantum key distribution, satellite-based quantum communication, and entanglement-based quantum precision measurement [2]

12月5日，中国科学院学术会堂，当新当选的院士代表、数学物理学部刘若川院士宣读中国科学院当选 院士承诺书时，中国工程院2025年当选院士学习教育暨颁证仪式也在同步进行。 "我愿意接受中国科学院院士称号，遵守中华人民共和国宪法和法律，遵照《中国科学院院士章程》， 正确行使院士权利，履行院士义务，珍惜院士荣誉，发挥明德楷模作用……" 140多位新当选院士分别从两院负责人手中郑重接过院士证书。聆听他们的故事，感受薪火传承的初心 与誓言，感知中国科技工作者的精神追求。 把论文写在祖国大地上 "祖国需要我到哪里，我就到哪里。"1990年，22岁的黄维娜一毕业，就义无反顾地踏上了前往贵州深山 的征程。 12月5日，中国科学院院士颁证仪式暨学习座谈会现场。新华社记者 金立旺 摄 三十载春秋流转，担任中国航发专职型号总师的黄维娜带领团队"死磕"多项长期制约我国发动机的"卡 脖子"技术，让无数国产战鹰拥有了真正的"中国心"。 从喀喇昆仑山边防公路建设到青藏高速公路攻关，汪双杰院士在极端环境奋斗40年，带领团队积累500 万组冻土公路实测数据，打造了全球领先的冻土工程研究高地。"我们三代冻土科研人做的，是国家战 略的需要"，朴实 ...

Core Viewpoint - The article commemorates the legacy of physicist Yang Zhenning, highlighting his contributions to quantum physics and the encouragement he provided to young scientists in China [2][4][5]. Group 1: Contributions to Quantum Physics - Yang Zhenning was an early advocate for the development of quantum information science, influencing many scientists, including Yao Qizhi, to return to China and contribute to the field [4]. - His insights into cold atom technology significantly advanced China's position in quantum simulation and quantum computing research, placing the country among the international leaders in this area [4]. - Yang emphasized the importance of experimental research in the field of cold atoms, stating that it was a rapidly developing area that required further exploration [4]. Group 2: Educational Philosophy - Yang Zhenning supported the idea of minimal restrictions on students in specialized programs, advocating for a flexible approach to education that allows students to pursue their strengths [7]. - He believed in fostering academic exchanges between universities and emphasized the need for a merit-based evaluation system in research [7]. - Yang's approach to research topics focused on the potential for development over the next three years rather than solely on unresolved significant problems [7]. Group 3: Influence and Legacy - His passing is viewed as a significant loss to the scientific community, with many prominent scientists expressing their condolences and reflecting on his impact [8][9]. - Yang Zhenning's relationship with various institutions, including Fudan University and the Chinese University of Hong Kong, showcased his long-standing commitment to academic collaboration and mentorship [8]. - He predicted that the future of global technological development would lean towards applied research, particularly in fields like chip technology, medicine, and bioengineering [8].

Core Insights - The passing of Yang Zhenning has prompted widespread mourning in the scientific community, highlighting his significant contributions to physics and the encouragement he provided to younger scientists [1][4][5]. Group 1: Contributions to Quantum Physics - Yang Zhenning was an early advocate for the development of quantum information science, influencing many scientists, including Pan Jianwei, to return to China and contribute to this field [1][4]. - His insights into cold atom technology were pivotal, as he recognized its potential as a rapidly advancing area of research as early as 2009 [1][4]. - Under Pan Jianwei's leadership, China has become a leader in cold atom quantum simulation and quantum computing research, a trajectory significantly influenced by Yang's vision [1]. Group 2: Educational Philosophy - Yang Zhenning emphasized the importance of allowing students in specialized programs, such as the youth class at the University of Science and Technology of China, to explore their interests without excessive constraints [4]. - He advocated for increased academic exchanges between universities and the implementation of a merit-based evaluation system in research [4]. Group 3: Legacy and Influence - Yang Zhenning's impact extended beyond physics; he was a respected figure in the broader scientific community, with tributes from various institutions acknowledging his contributions [4][5]. - His long-standing relationship with institutions like Hong Kong Chinese University and Fudan University reflects his deep-rooted influence in academia and research collaboration [5][6]. - Yang's predictions about the future of technology, particularly in fields like chip applications and biomedical advancements, underscore his forward-thinking approach to science and its role in economic development [6].

Core Insights - A team of American scientists has developed the most conductive organic molecule known to date, which opens new avenues for creating smaller and more powerful computing devices at the molecular scale [1][2] - The molecule is composed of common elements found in nature, such as carbon, sulfur, and nitrogen, and demonstrates exceptional stability in everyday environments [1][2] Group 1: Breakthrough in Conductivity - The research indicates that the new organic molecule allows electrons to traverse at high speeds with minimal energy loss, theoretically achieving maximum efficiency in electron transport [1] - This discovery marks the first time that the electronic migration of organic molecules has been confirmed over distances of several tens of nanometers without loss [1] Group 2: Implications for Quantum Information Science - The extraordinary properties of this molecule may lead to revolutionary advancements in quantum information science, as the observed high conductivity is attributed to the cooperative action of electron spins at both ends of the molecule [2] - The molecule's compatibility with existing nanoelectronic components and its low-cost, laboratory-synthesizable raw materials could enhance the performance and energy efficiency of computing devices without incurring additional costs [2]