Warm inflation with an oscillatory inflaton in the non-minimal kinetic coupling model

Abstract

In the cold inflation scenario, the slow roll inflation and reheating via coherent rapid oscillation, are usually considered as two distinct eras. When the slow roll ends, a rapid oscillation phase begins and the inflaton decays to relativistic particles reheating the Universe. In another model dubbed warm inflation, the rapid oscillation phase is suppressed, and we are left with only a slow roll period during which the reheating occurs. Instead, in this paper, we propose a new picture for inflation in which the slow roll era is suppressed and only the rapid oscillation phase exists. Radiation generation during this era is taken into account, so we have warm inflation with an oscillatory inflaton. To provide enough e-folds, we employ the non-minimal derivative coupling model. We study the cosmological perturbations and compute the temperature at the end of warm oscillatory inflation.

22 pages, typos fixed, accepted by EPJC

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• The warm inflation story
• Dynamical and observational constraints on the Warm Little Inflaton scenario
• Irreversible thermodynamical description of warm inflationary cosmological models
• Warm inflation with non-comoving scalar field and radiation fluid
• Quasinormal modes of scalar field coupled to Einstein's tensor in the non-commutative geometry inspired black hole
• Inflation in Weyl Scaling Invariant Gravity with $R^3$ Extensions
• End of the constant-roll inflation, and the reheating temperature
• G-Warm inflation: Intermediate model
• No scalar hair in nonminimal derivative coupling model for Neumann and Dirichlet reflecting star