报告题目：Stasis: A New Phenomenon in Early-Universe Cosmology

报  告 人：黄飞 博士，以色列魏茨曼科学研究所

研究方向：暗物质现象学和粒子宇宙学

报告时间：2023年12月28日（星期四）上午10:00

报告地点：量子楼410

报告摘要：

Many theories of BSM physics predict the existence of large or infinite towers of decaying states. In this talk, we demonstrate that this can give rise to a surprising phenomenon that we dubbed "stasis" during which the abundances of different energy component remain constant across extended cosmological eras. We show that such stasis epochs are universal attractors, with the universe necessarily entering (and later exiting) such epochs for a wide variety of initial conditions. The cosmological stasis is therefore an important and potentially unavoidable feature of many BSM cosmologies. Taken together, these results greatly expand the range of theoretical and phenomenological possibilities for the physics of the early universe, introducing new types of cosmological eras which may play an intrinsic and potentially inevitable role within numerous BSM cosmologies.

报告人简介：

黄飞博士于2019年获得美国亚利桑那大学高能物理理论博士学位，2019年至2022年在中国科学院理论物理研究所和美国加州大学欧文分校从事博士后工作，现在在以色列魏茨曼科学研究所从事博士后研究，获Dean of Faculty Fellowship和Postdoctoral Excellence Fellowship。 他的主要研究方向集中在暗物质现象学和粒子宇宙学，特别是这些领域中超越传统范式的新物理和新思想。