报告摘要：We introduce black hole superradiance, namely how light Bosonic fields can extract energy from rotating black holes, and build up its abundance around the black hole, forming a “gravitational atom”. Like real atoms, different states of gravitational atoms can transit to each other due to companion objects. And these companion objects can disrupt the Bosonic cloud by turning a stable state to an unstable one.
个人简介：Yi got his PhD from the Institute for Theoretical Physics, CAS in 2009. Then he was postdocs at McGill, IPMU and Cambridge. In 2015 he joined the Hong Kong University of Science and Technology, and now is an Associate Professor there