PIRSA:25120024

A simple guide to warm inflation model building

Broadberry, E. (2025). A simple guide to warm inflation model building. Perimeter Institute. https://pirsa.org/25120024

Broadberry, Edward. A simple guide to warm inflation model building. Perimeter Institute, Dec. 05, 2025, https://pirsa.org/25120024 

          @misc{ pirsa_PIRSA:25120024,
            doi = {10.48660/25120024},
            url = {https://pirsa.org/25120024},
            author = {Broadberry, Edward},
            keywords = {Particle Physics},
            language = {en},
            title = {A simple guide to warm inflation model building},
            publisher = {Perimeter Institute},
            year = {2025},
            month = {dec},
            note = {PIRSA:25120024 see, \url{https://pirsa.org}}
          }

Edward Broadberry University of Maryland, College Park

Talk numberPIRSA:25120024
DOI10.48660/25120024
Collection
Talk Type Scientific Series
Subject

Abstract

Inflaton couplings during warm inflation result in the production of a thermal bath. Thermal fluctuations can dominate the standard de Sitter analogues, resulting in a modified slow-roll scenario with a new source of density fluctuations. It is generally difficult to reliably calculate the predictions of warm inflation, and therefore assess its viability as a model of the early universe. We will present a fully calculable perturbative model of warm inflation, and discuss its main features. We will see that the thermal bath develops a chemical potential. The chemical potential has a rather large impact, and in extreme cases the chemical potential can stop warm inflation from happening all together.