报告题目：The dilaton-Einstein-Gauss-Bonnet Cosmology and Some Constraints from WIMPs and the Gravitational Waves

报告人：Bum-Hoon Lee 教授 （Sogang University）

报告时间：2024年10月18日（周五）上午10:00-11:00

报告地点：北洋园校区49教410室

报告摘要：

The dilaton-Einstein-Gauss-Bonnet (dEGB) Gravity is one of the simplest extensions of Einstein's gravity with the higher curvature term. We focus on the implication of this theory to cosmological evolution - inflation, reheating, and radiation dominant phases. Aside from the effects of the Gauss-Bonnet term at each stage of the cosmology, it opens new possible phases: “Slow-roll”, “fast-roll”, and “kination” at the higher temperatures, in addition to the well-accepted radiation dominant, matter dominant, and cosmological constant dominant phases of the standard cosmological model. We put the bounds on the parameters of dEGB gravity theory based on the WIMP physics and gravitational waves from the mergers of black holes. We also discuss the impact of the gravitational waves from the standard model particle plasma in the early universe.

报告人简介：

Prof. Bum-Hoon Lee obtained his Ph.D. from Columbia University in 1989, and then became a professor at Hanyang University and Sogang University. From 2005 to 2014, he promoted the construction of QUeST (Center for Quantum Space Time) and served as the first director. After 2015, he served as the president of the Korean Physical Society (KPS), Asia Pacific Center for Theoretical Physics (APCTP), and Korea Council of High Energy Physics. He received many honors such as the SungBong Prize of the Korean Physical Society in 2023, Minister Citation of Contribution to Securing Research Ethics in 2022, Presidential Medal in 2022, and Minister Citation of Contribution to the Basic Research Promotion in 2012. He is also the editor of International Journal of Physics A, Modern Physics Letters A. His works have been cited more than 3000 times, with an H-index of 30. His recent research interests include gravity, cosmology, and string theory.