报告人：蔡一夫教授（中国科学技术大学）

题目：Relics from nonlinear resonances in the very early universe

时间：2022年9月28号（周三）早上10:30

腾讯ID：405 513 671

邀请人：魏少文

报告摘要

Primordial black holes (PBHs) are widely considered as a hypothetical candidate of dark matter. However, the formation and astrophysical effects of PBHs still remain unclear. To gain the insights from the theoretical perspective, we proposed a novel mechanism of the sound speed resonance (SSR) cosmology that produces PBHs efficiently. I will briefly review the PBHs and the SSR mechanism and summarize what we have learned in this subject so far. I will also introduce a recent work on the application of the nonlinear resonance mechanism into primordial gravitational waves that can beat the famous Lyth bound widely existing in inflation models. Our novel discovery provides a promising probe for new physics in the very early universe in the forthcoming cosmic microwave background experiments.

个人简介:

蔡一夫，中国科学技术大学教授。获得过国家创新人才青年项目和基金委优秀青年基金资助，目前主持科技部国家重点研发计划引力波专项。研究领域是粒子宇宙学。兴趣集中在宇宙起源、大尺度结构的早期形成、暗物质暗能量等方面。在国际核心期刊已发表学术论文130余篇，总被引用8400余次。