Fresh inflation with increasing cosmological parameter

TL;DR

This paper investigates a fresh inflation model with an increasing F-cosmological parameter, demonstrating it produces enough e-folds, matches observed density fluctuations, and maintains negligible entropy perturbations, emphasizing adiabatic dominance.

Contribution

It introduces a novel fresh inflation model with an increasing cosmological parameter and analyzes its implications for entropy perturbations and primordial fluctuations.

Findings

Sufficient e-folds to solve flatness/horizon problems

Density fluctuations align with experimental data

Entropy perturbations remain negligible during inflation

Abstract

I study a fresh inflationary model with an increasing F-cosmological parameter. The model provides sufficiently e-folds to solve the flatness/horizon problem and the density fluctuations agree with experimental values. The temperature increases during fresh inflation and reach its maximum value when inflation ends. I find that entropy perturbations always remain below $10^{-4}$ during fresh inflation and become negligible when fresh inflation ends. Hence, the adiabatic fluctuations dominate the primordial spectrum at the end of fresh inflation.