Inflationary expansion of the universe with variable timescale

TL;DR

This paper investigates a cosmological model with a variable timescale driven by an inflaton field, showing predictions that align well with Planck 2018 data, and analyzes spectral indices and slow-roll parameters.

Contribution

It introduces a novel inflationary model with a variable timescale and compares its predictions to observational data, demonstrating good agreement.

Findings

Spectral indices match Planck 2018 observations

Slow-roll parameters are consistent with data

Model provides a viable alternative inflation scenario

Abstract

We explore a cosmological model in which the time scale is variable with the expansion of the universe and the effective spacetime is driven by the inflaton field. An example is considered and their predictions are contrasted between Planck 2018 data. We calculate the spectrum indices and the slow-rolling parameters of the effective potential. The results are in very good agreement with observations.