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SUMMARY:Bubble wall dynamics from non-equilibrium quantum field theory
DTSTART;VALUE=DATE-TIME:20260601T060000Z
DTEND;VALUE=DATE-TIME:20260601T070000Z
DTSTAMP;VALUE=DATE-TIME:20260702T160100Z
UID:indico-event-5073@indico-tdli.sjtu.edu.cn
DESCRIPTION:Speakers: Matthias Carosi (ICTP-AP)\n\nAbstract:First-order ph
 ase transitions in the early universe are a unique probe of physics beyond
  the Standard Model\, with potential implications for electroweak baryogen
 esis\, the formation of primordial black holes\, magnetogenesis and the pr
 oduction of dark matter. Upcoming gravitational wave detectors may capture
  the imprint of such transitions\, but to extract theoretical insights fro
 m these signals requires a precise understanding of the underlying dynamic
 s. In this talk\, I show how the language of nonequilibrium quantum field
  theory\, combined with the two-particle-irreducible effective action\, pr
 ovides a natural framework for describing the dynamics of a bubble after n
 ucleation. After a brief introduction to the closed-time-path formalism\, 
 I derive the dynamical equations governing the bubble and the plasma\, and
  identify all sources of friction for the bubble expansion. This framework
  unifies the pre-existing approaches within a single\, consistent descript
 ion. In the ultrarelativistic regime\, I demonstrate how to compute the fr
 iction induced by the pair production of heavy scalar particles and outlin
 e the contributions of particle mixing and transition radiation.Biography:
 Matthias Carosi completed his PhD at the Technical University of Munich an
 d is now a postdoctoral researcher at the International Centre for Theoret
 ical Physics Asia-Pacific (ICTP-AP) in Beijing. His work focuses on theore
 tical aspects of phase transitions in quantum field theory\, including sem
 iclassical methods for the calculation of the nucleation rate and the real
 -time formalism to describe the evolution of bubbles after nucleation.Alte
 rnatively online link:https://meeting.tencent.com/dm/PxPrYPAS98xtID：6033
 13617 \n\nhttps://indico-tdli.sjtu.edu.cn/event/5073/
LOCATION:Tsung-Dao Lee Institute/N6F-N600 - Lecture Room (Tsung-Dao Lee In
 stitute)
URL:https://indico-tdli.sjtu.edu.cn/event/5073/
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