REMINDER High Energy Physics Seminar TODAY - Veronica Sacchi

[HECAP - Margherita Di Giovannantonio]

*_HIGH ENERGY PHYSICS SEMINARS_*
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*Tuesday, 9 June *2026, at *16:00* - *_Euler Lecture 
Hall_***-*https://indico.ictp.it/event/11367/ 
<https://indico.ictp.it/event/11367/>*


Veronica Sacchi (EPFL, Lausanne)


*“A study of scalar QED in de Sitter space"*
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_Abstract_

In this talk I present a study of scalar QED in (3+1)-dimensional de 
Sitter space. Building on recent technical advances in QFT on Anti–de 
Sitter space, we propose gauge‑invariant observables in de Sitter and 
compute them explicitly in perturbation theory, up  to one loop order. 
Along the way I will explain the analytic continuation to Euclidean AdS 
and time-permitting review a few interesting AdS phenomena for scalar 
QED with unusual boundary conditions. Back to dS, I will discuss a 
Debye‑screening–like effect in a cosmological setting.

To attend via _*Zoom*_, please *_register_* here:
https://zoom.us/meeting/register/A02wEI6WSdO9SBbA5FdJ7w