Journal of High Energy Physics

, 2013:24

Warm inflection


DOI: 10.1007/JHEP01(2013)024

Cite this article as:
Cerezo, R. & Rosa, J.G. J. High Energ. Phys. (2013) 2013: 24. doi:10.1007/JHEP01(2013)024


While ubiquitous in supersymmetric and string theory models, inflationary scenarios near an inflection point in the scalar potential generically require a severe fine-tuning of a priori unrelated supersymmetry breaking effects. We show that this can be significantly alleviated by the inclusion of dissipative effects that damp the inflaton’s motion and produce a nearly-thermal radiation bath. We focus on the case where the slow-rolling inflaton directly excites heavy virtual modes that then decay into light degrees of freedom, although our main qualitative results should apply in other regimes. Furthermore, our analysis shows that the minimum amount of dissipation required to keep the temperature of the radiation bath above the Hubble rate during inflation is largely independent of the degree of flatness of the potential, although it depends on the field value at the inflection point. We then discuss the relevance of this result to warm inflation model building.


Cosmology of Theories beyond the SM Thermal Field Theory Supersymmetric Effective Theories Quantum Dissipative Systems 

Copyright information

© SISSA, Trieste, Italy 2013

Authors and Affiliations

  1. 1.Departamento de Física Teórica y del Cosmos and CAFPEUniversidad de GranadaGranadaSpain
  2. 2.Departamento de Física da Universidade de Aveiro and I3NAveiroPortugal

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