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Article Dans Une Revue JCAP Année : 2019

Inflationary models that generalize the constant roll constraint

Résumé

Recently a class of inflationary models satisfying the constant rate of roll constraint, ̈φ+(3+α)H&dotphi;=0, has been studied and compared with the latest cosmological observational data. We consider the broader class of constraints  ̈φ+α1/2&dotphi;+α2 H&dotphi;=0 and find an exact particular solution, without initial singularity, which is an attractor of the dynamics governed by a positive periodic potential V(φ)=E+ F cos (Ω φ )+G cos (2 Ω φ ). The spectral index ns and the tensor to scalar ratio r are consistent with the recent observational data.

Dates et versions

hal-01897134 , version 1 (16-10-2018)

Identifiants

Citer

B. Boisseau, H. Giacomini. Inflationary models that generalize the constant roll constraint. JCAP, 2019, 10, pp.054. ⟨10.1088/1475-7516/2019/10/054⟩. ⟨hal-01897134⟩
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