杨大能是加州大学河滨分校的博士后，现在准备加入紫金山天文台。他近年来的研究重心是探索宇宙中暗物质的分布和相关的新物理特征。他开发了适于并行计算的暗物质的自相互作用模块，并提出了参数化的模型来理解和大量获取理论预言。他同合作者们开展了从矮星系尺度到星系群尺度的多个大型宇宙学模拟，并对暗物质自相互作用引起的可能观测效应进行了探索。他的研究广泛涉及宇宙的结构生成，暗物质探测，还有对撞机上对规范博色子的产生等。他博士和本科毕业于北京大学，之前在清华大学做博后，曾在欧洲核子中心，日本高能加速器研究机构，美国匹兹堡大学等多个机构访问交流。In this talk, I will present strategies and methods of searching for self-interacting dark matter (SIDM) based primarily on works with collaborators from recent years. SIDM posits that dark matter particles undergo elastic scattering among themselves and interact with Standard Model particles only through gravity. Evidence for SIDM can only be inferred indirectly through its influence on visible matter. In recent years, small-scale observations challenging the ΛCDM model have continued to emerge. Aside from the traditional issues related to dark matter densities, particularly the "diversity problem," new challenges have surfaced, such as the observations pertaining to dark matter-deficient galaxies, strong lensing perturbers, and dark matter density spikes. Intriguingly, studies suggest that SIDM has the potential to explain many of these anomalies. Exploring the signatures of SIDM requires multi-faceted efforts. Aside from improvements in data quality and accumulation, theorists are making progress in both methodologies and simulations. Recent theoretical advancements have enabled the quantitative prediction of SIDM halo properties based on particle physics models and realistic accretion histories, improving our ability to explore and interpret observations. With upcoming data, there is great promise in either detecting SIDM signatures or constraining its parameter space in the near future.