时间：2026 年 8 月 20 日（周四）15:30 -17:00

讲者：高文龙，宁波东方理工大学副教授、研究员

地点：云谷校区 E10-305｜Venue: E10-305, Yungu Campus

主持人：西湖大学工学院助理教授 田静逸 Host: Jingyi Tian, Assistant Professor, School of Engineering

语言：中文｜Language: Chinese

BIOGRAPHY: 高文龙，宁波东方理工大学副教授、研究员。中国科学技术大学、上海交通大学兼职博士生导师。获得国家高层次人才计划青年项目（海外）、宁波市特优人才。主持国家自然科学基金面上，宁波市甬江人才工程，宁波市自然科学基金，参与浙江省创新创业团队项目等。曾任英国伯明翰大学物理与天文学院、德国帕德博恩大学物理学院博士后研究员。在 Physical Review Letters、Science Advances、Nature Communications、Light Science & Applications 等期刊发表文章 50 余篇。近年来关注图论指导下的隐藏对称性、基于超构表面的新型光电探测器件、高次谐波产生等方向。

ABSTRACT:Seeking symmetry where it is not manifest, physicists have explored hidden symmetries throughout classical to quantum systems. A framework of generalized geometric symmetries established on the basis of graph theory, dubbed ‘latent symmetries’, whose existence can be elegantly discerned entirely algebraically has fuelled this endeavour anew. In this letter, we drastically advance the understanding of latent symmetries revealing a correspondence between latent and geometric symmetries. Based on both graph theory and group theory, this correspondence allows to transform a latent symmetric system into one with intuitive geometric symmetries. Building upon the theoretical advances, we experimentally demonstrate third higher-order topological insulators (HOTI) protected by latent symmetry groups. Our work underpins a thorough group theoretical understanding of latent symmetries and paves the way for their further utilizations in designing and engineering exotic matters in classical waves, solid-state materials, and quantum systems.

References:[1] X.Y. Zhang, R.T. Ye, M. Röntgen*, M.L. Chen*, S.H. Wei, S. Zhang, W. Gao*, Phys. Rev. Lett. 137, 056602(2026)