Cosmo-26

A new look at particle production from a sharp turn of the inflationary trajectory

Not scheduled

15m

Gorlaeus gebouw (Leiden University)

Poster

Speaker

Jakub Kalkowski (University of Warsaw)

Description

During expansion in the de Sitter spacetime, particle production takes place from the perspective of the observer for whom the vacuum state was defined in the past.
To account for this phenomenon, we use a newly developed formalism of
Nicolas Parra et al. [arXiv:2410.13843v2], which greatly simplifies the analysis.
We derive the predictions for the number density of particles produced at a strongly
non-adiabatic turn of the inflationary trajectory in multi-field models of inflation.