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23–26 Sept 2025
DESY Hamburg
Europe/Berlin timezone

Bubble wall dynamics from nonequilibrium QFT

24 Sept 2025, 17:06
18m
Bldg. 1b, seminar room 4a (DESY)

Bldg. 1b, seminar room 4a

DESY

Cosmology & Astroparticle Physics Parallel Sessions Wednesday Cosmo

Speaker

Matthias Carosi (TUM)

Description

First-order phase transitions (FOPT) in the early universe are a unique probe of physics beyond the Standard Model, playing a key role in electroweak baryogenesis and many different phenomena. Future gravitational wave detectors will allow us to see the signature of possible FOPT, but to extract theoretical value from it, we need a precise understanding of their dynamics. In this talk, I demonstrate how the language of non-equilibrium quantum field theory, together with the two-particle-irreducible effective action, offers a natural framework to describe the dynamics of a bubble after nucleation.
The arising picture captures all relevant fluid dynamics and quantum effects, thus unifying the existing frameworks for studying the bubble wall dynamics in all velocity regimes.

Primary authors

Björn Garbrecht Carlos Tamarit Matthias Carosi (TUM) Dr Miguel Vanvlasselaer Dr Wenyuan Ai

Presentation materials