On the consistency of warm inflation in the presence of viscosity

S. Del Campo, RAMON ALEJANDRO HERRERA APABLAZA, D. Pavón, J. R. Villanueva

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

This paper studies the stability of warm inflationary solutions when the viscous pressure is taken into account. The latter is a very natural and physically motivated ingredient of warm inflation and is seen to widen the stability range of warm inflation. The spectral index parameters, ns, UT, and their ratio are derived. The corresponding WMAP7 data are used to fix some parameters of the model. Two specific examples are discussed in detail: (i) a potential given by V((φ),T) = vi((φ)) + V2(T), and (ii) a potential of the form V(φ,T) = αv1((φ) v2(T). In both cases, the viscosity has little impact on the said ratio.

Original languageEnglish
Article number002
JournalJournal of Cosmology and Astroparticle Physics
Volume2010
Issue number8
DOIs
StatePublished - 1 Aug 2010

Keywords

  • Cosmological perturbation theory
  • Inflation

Fingerprint

Dive into the research topics of 'On the consistency of warm inflation in the presence of viscosity'. Together they form a unique fingerprint.

Cite this