TY - JOUR
T1 - On the consistency of warm inflation in the presence of viscosity
AU - Del Campo, S.
AU - Herrera, R.
AU - Pavón, D.
AU - Villanueva, J. R.
PY - 2010/8
Y1 - 2010/8
N2 - 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.
AB - 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.
KW - Cosmological perturbation theory
KW - Inflation
UR - http://www.scopus.com/inward/record.url?scp=78449271891&partnerID=8YFLogxK
U2 - 10.1088/1475-7516/2010/08/002
DO - 10.1088/1475-7516/2010/08/002
M3 - Article
AN - SCOPUS:78449271891
SN - 1475-7516
VL - 2010
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
IS - 8
M1 - 002
ER -