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SUMMARY:Hubble-induced phase transitions and Higgs dynamics in the early U
 niverse
DTSTART:20260414T120000Z
DTEND:20260414T130000Z
DTSTAMP:20260426T073600Z
UID:indico-event-100@indico.zdv.uni-mainz.de
DESCRIPTION:Speakers: Giorgio Laverda (JGU Mainz)\n\nA non-minimal couplin
 g between scalar fields and spacetime curvature can play a central role in
  the history of the early Universe. For a prototypical spectator field\, t
 he time dependence of the Ricci scalar acts as a cosmic clock that can tri
 gger a second-order phase transition as the Universe evolves from inflatio
 n to kination. In this talk\, I will show how such Hubble-induced phase tr
 ansitions can efficiently reheat the Universe through non-perturbative par
 ticle production\, while simultaneously sourcing a stochastic gravitationa
 l-wave background. The non-linear dynamics of this process is captured usi
 ng classical lattice simulations\, allowing for a systematic exploration o
 f the model’s parameter space. Focusing on the case of the non-minimally
  coupled Higgs\, I will discuss how electroweak vacuum stability constrain
 s the viable parameter space of the model. When these constraints are sati
 sfied\, the Higgs can drive efficient reheating into a Standard Model plas
 ma prior to big bang nucleosynthesis. The associated gravitational-wave si
 gnal offers a window into the high-energy features of the Higgs effective 
 potential.\n\nhttps://indico.zdv.uni-mainz.de/event/100/
LOCATION:R. 05-127 (Lorentz-Room) (Institute of Physics)
URL:https://indico.zdv.uni-mainz.de/event/100/
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