Inhomogeneous imperfect fluid inflation

TL;DR

This paper explores a generalized inhomogeneous imperfect fluid model with a Chaplygin gas and viscosity for inflation, demonstrating compatibility with PLANCK data and natural exit from inflation.

Contribution

It introduces a novel inflationary model combining a generalized equation of state with a Chaplygin gas and viscous effects, aligning with recent observational data.

Findings

Model reproduces PLANCK data effectively

Natural exit from inflation achieved in the model

Chaplygin gas contribution influences inflation dynamics

Abstract

A generalized equation of state corresponding to a model that includes a Chaplygin gas and a viscous term is investigated, in the context of the reconstruction program in scalar field cosmology. The corresponding inflationary model parameters can be conveniently adjusted in order to reproduce the most recent PLANCK data. The influence of the Chaplygin gas term contribution, in relation with previous models, is discussed. Exit from inflation is shown to occur quite naturally in the new model.