Interacting holographic dark energy in the scalar-Gauss-Bonnet gravity

TL;DR

This paper explores how interacting holographic dark energy within scalar-Gauss-Bonnet gravity can produce phantom-like equations of state, offering insights into cosmic acceleration and dark energy behavior.

Contribution

It introduces a model combining holographic dark energy with scalar-Gauss-Bonnet gravity, demonstrating the possibility of crossing the phantom divide in a flat universe.

Findings

Effective equation of state can cross -1.

Phantom-like behavior is achievable in this framework.

Scalar field potential is reconstructed.

Abstract

In this paper we study cosmological application of interacting holographic dark energy density in the scalar-Gauss-Bonnet framework. We employ the interacting holographic model of dark energy to obtain the equation of state for the interacting holographic energy density in spatially flat universe. Our calculation show, taking $\Omega_{\Lambda}=0.73$ for the present time, it is possible to have $w_{\rm \Lambda}^{eff}$ crossing -1. This implies that one can generate phantom-like equation of state from the interacting holographic dark energy model in flat universe in the scalar-Gauss-Bonnet cosmology framework. Then we reconstruct the potential of the scalar field.