Ideal fluid and acceleration of the universe

TL;DR

This paper proposes a model where dark energy and the universe's late-time acceleration are explained by an ideal fluid with an implicit equation of state, avoiding scalar fields.

Contribution

It introduces a scalar-free model of dark energy using an ideal fluid with an implicit equation of state to explain cosmic acceleration.

Findings

Late-time acceleration can be achieved without scalar fields.

The ideal fluid model provides a viable alternative to scalar field models.

The approach simplifies the understanding of dark energy phenomena.

Abstract

The solution of the dark energy problem in models without scalars is presented. It is shown that a late-time accelerating cosmology may be generated by an ideal fluid with some implicit equation of state.