Salvaging Power-Law Inflation through Warming
M. Alhallak (Damascus Univ.), N. Chamoun (HIAST), M. S. Eldaher, (Damascus Univ.)

TL;DR
This paper explores how power-law inflation models can be reconciled with observational data by incorporating warm inflation dynamics and small modifications to enable a graceful exit, showing compatibility with Planck and BICEP/Keck results.
Contribution
It introduces a perturbed modification to power-law inflation that allows for a graceful exit and demonstrates its consistency with observational constraints in both warm and cold inflation scenarios.
Findings
Power-law inflation models can match observational data with appropriate dissipation parameters.
A small perturbation to the power-law form enables a viable exit from inflation.
The modified models are consistent with Planck and BICEP/Keck constraints.
Abstract
Power-Law inflation with scale factor is investigated in the context of warm inflation. The treatment is performed in the weak and strong dissipation limits. In addition, we discuss the three common cases for the thermal dissipation coefficient . We compare the theoretical results of the Power-Law model within warm inflation with the observational constraints from Planck and BICEP/Keck 2018, as presented by the tensor-to-scalar ratio and spectral index . The model results agree largely with the observations for most of the cases. Furthermore, in order to address the problem of exiting the inflationary epoch, we suggest a perturbed modification to the power-law definition so that it becomes affine, and find that this small change indicates a way for having an exit scenario with a suitable e-foldings number. Finally, we examine this…
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Taxonomy
TopicsCosmology and Gravitation Theories · Geophysics and Gravity Measurements · Black Holes and Theoretical Physics
