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Paper   IPM / P / 16202
School of Physics
  Title:   Constant roll warm inflation in high dissipative regime
1.  V. Kamali
2.  M. Artymowski
3.  M.R. Setare
  Status:   Published
  Journal: JCAP
  Vol.:  2020
  Year:  2020
  Pages:   15
  Supported by:  IPM
Constant-roll warm inflation is introduced in this work. A novel approach to finding an exact solution for Friedman equations coupled to the scalar field equation of motion is presented for cold inflation and is extended to warm inflation with the constant dissipative parameter Q=[(Γ)/(3H)]. The evolution of the primordial inhomogeneities of a scalar field in a thermal bath is also studied. The 1σ consistency between the theoretical predictions of the model and observational constraints has been proven for a range of Q and β = −[(·· ϕ)/(3Hϕ)] (constant rate of inflaton roll). In addition, we briefly investigate the possible enhancement of super-horizon perturbations beyond the slow-roll approximation.

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