EFT's for Strong Phase Transitions

by Farbod Rassouli (University of Nottingham)

Tuesday 20 Oct 2026, 14:00 → 15:00 Asia/Shanghai

Tsung-Dao Lee Institute/N6F-N600 - Lecture Room (Tsung-Dao Lee Institute)

Abstract:

I present an EFT framework for strong, indeed the strongest, cosmological phase transitions — this is precisely where standard high-temperature dimensional reduction fails. After reviewing high-temperature dimensional reduction for weak and intermediate transitions and pinpointing where its standard assumptions fail, we construct EFTs that remain valid for very strong transitions. The approach applies to Higgs-like and multi-field models, including those with tree-level barriers.

Speaker Bio:

Farbod Rassouli is a third-year PhD student at the University of Nottingham under the supervision of Dr. Oliver Gould and Prof. Paul Saffin. He is currently working on strong phase transitions in QFT, the problem of time in quantum cosmology, and the cosmological constant problem. He completed his undergraduate studies at Royal Holloway University of London (2017–2022) and obtained his Master of Science in Quantum Fields and Fundamental Forces at Imperial College London (2022–2023). His research interests include quantum cosmology, topology change, and phase transitions in QFT.

Alternative online link: https://meeting.tencent.com/dm/h2h1IlpQU8tI
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