Reconstructing warm inflation

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Abstract

The reconstruction of a warm inflationary universe model from the scalar spectral index nS(N) and the tensor to scalar ratio r(N) as a function of the number of e-folds N is studied. Under a general formalism we find the effective potential and the dissipative coefficient in terms of the cosmological parameters nS and r considering the weak and strong dissipative stages under the slow roll approximation. As a specific example, we study the attractors for the index nS given by nS- 1 ∝ N- 1 and for the ratio r∝ N- 2, in order to reconstruct the model of warm inflation. Here, expressions for the effective potential V(ϕ) and the dissipation coefficient Γ (ϕ) are obtained.

Original languageEnglish
Article number245
JournalEuropean Physical Journal C
Volume78
Issue number3
DOIs
StatePublished - 1 Mar 2018

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