Cosmological first-order phase transitions: Fun with bubbles

by Dr Wen-Yuan Ai (Institute of High Energy Physics, Austrian Academy of Sciences)

Friday 17 Jan 2025, 16:00 → 17:00 Asia/Shanghai

N601 (Tsung-Dao Lee Institute)

Abstract: Cosmological first-order phase transitions (FOPTs) are a promising source of a stochastic gravitational wave background and meanwhile have far-reaching phenomenological implications. Among these, bubble wall dynamics plays a pivotal role. In this talk, I will first introduce efficient methods for estimating the bubble wall velocity. I will then discuss two novel phenomenological applications of FOPTs: the production of heavy dark matter and the formation of primordial black holes, aiming to balance technical details with a broader perspective on the significance of FOPTs.

Bio: Wen-Yuan Ai, Postdoc at Institute of High Energy Physics, 
Austrian Academy of Sciences.

Wen-Yuan Ai's research centers on quantum field theory (QFT) and cosmology, with a particular focus on the non-perturbative aspects of QFT and the application of rigorous QFT methods (e.g. nonequilibrium QFT) to deepen the understanding of the early Universe, such as inflation, reheating, and first-order phase transitions.

Venue: N601,TDLI
Online link: https://meeting.tencent.com/dm/VleswhGxy8KR

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