Dissipative Universe-Inflation with Soft Singularity

TL;DR

This paper explores a dissipative inflationary universe model with a soft singularity, analyzing its compatibility with observational data and its implications for early universe dynamics.

Contribution

It introduces a cosmological model incorporating dissipative effects and a soft singularity, aligning theoretical predictions with Planck satellite observations.

Findings

Spectral index matches observational data

Minor deviations in scalar-to-tensor ratio

Supports dissipative inflation with soft singularity

Abstract

We investigate the early-time accelerated universe after the Big Bang. We pay attention to the dissipative properties of the inflationary universe in the presence of a soft type singularity, making use of the parameters of the generalized equation of state of the fluid. Flat Friedmann-Robertson-Walker metric is being used. We consider cosmological models leading to the so-called type IV singular inflation. Our obtained theoretical results are compared with observational data from the Planck satellite. The theoretical predictions for the spectral index turn out to be in agreement with the data, while for the scalar-to tensor ratio there are minor deviations.