Accelerating cosmology in modified gravity with scalar field

TL;DR

This paper explores how incorporating a phantom scalar field into modified gravity models with a 1/R term influences cosmological solutions and the inflationary behavior of the universe.

Contribution

It introduces a new approach by combining phantom scalar fields with modified gravity to analyze their combined effects on cosmological evolution.

Findings

Phantom field alters inflationary dynamics in modified gravity.

Multiple cosmological solutions are derived with phantom fields.

Inflation is affected by the presence of the phantom scalar.

Abstract

The modified gravity with 1/R term (R being scalar curvature) and the Einstein-Hilbert term is studied by incorporating the phantom scalar field. A number of cosmological solutions are derived in the presence of the phantom field in the perfect fluid background. It is shown the current inflation obtained in the modified gravity is affected by the existence the phantom field.