Speaker
Description
Warm inflation offers an alternative description of the early Universe in which dissipative effects and radiation production are already present during the accelerated expansion. In this talk, I will discuss the scalar perturbation sector of warm-inflationary models, focusing on its extension from the standard single-field framework to two-scalar-field scenarios.
Starting from known single-field results, I will present a two-field setup, allowing for a controlled analysis of the weak dissipative regime. I will then comment on the extension to different dissipative regimes and on the challenges associated with the fully general case. The aim is to clarify how multi-field dynamics and dissipation affect the primordial scalar spectrum and to outline a path toward a complete perturbative treatment of two-field warm inflation.