G-Warm inflation
arXiv:1701.07934 · doi:10.1088/1475-7516/2017/05/029
Abstract
A warm inflationary universe in the context of Galileon model or G-model is studied. Under a general formalism we study the inflationary dynamics and the cosmological perturbations considering a coupling of the form $G(Ï,X)=g(Ï)\,X$. As a concrete example, we consider an exponential potential together with the cases in which the dissipation and Galilean coefficients are constants. Also, we study the weak regime given by the condition $R<1+3gH\dotÏ$, and the strong regime in which $1<R+3gH\dotÏ$.Additionally, we obtain constraints on the parameters during the evolution of G-warm inflation, assuming the condition for warm inflation in which the temperature $T>H$, the conditions for the weak and strong regimes, together with the consistency relation $r=r(n_s)$ from Planck data.
23 pages, 4 figures, Accepted for publication in JCAP