Phenomenological Consequences of Phase Transitions During Inflation

by Haipeng An (Tsinghua University)

Wednesday 26 Nov 2025, 15:00 → 17:00 Asia/Shanghai

图书馆楼319

摘要：It is well established that the Universe underwent an inflationary epoch prior to the hot Big Bang, during which the expansion accelerated. To achieve this and to resolve shortcomings of the standard Big Bang model, inflation must encompass roughly 40–60 e-folds of expansion. After a brief, pedagogical introduction to inflation, I will argue that cosmological phase transitions during the inflationary era are well motivated. I will also show that such transitions can generate a range of potentially observable signatures—including stochastic gravitational waves, primordial black holes, and primordial non-Gaussianity—that may be within reach of near-future observations.

个人简介：安海鹏，2006年本科毕业于北京大学物理学院，2011年在美国马里兰大学获得博士学位，2011年至2014年在加拿大圆周理论物理研究所做博士后，2014年至2017年在美国加州理工学院做博士后并获得Walter-Burke Fellowship。2017年回国在清华大学物理系任教，现为清华大学物理系长聘副教授。主要研究方向为粒子物理和宇宙学。