Holographic Dark Energy Model and Scalar-Tensor Theories

TL;DR

This paper explores a holographic dark energy model within scalar-tensor theories, demonstrating that certain potentials lead to negative equation of state parameters and enable the universe's transition from deceleration to acceleration.

Contribution

It introduces a generalized scalar-tensor framework for holographic dark energy, analyzing how different scalar potentials influence cosmic acceleration.

Findings

Equation of state parameter becomes negative for various potentials

Transition from deceleration to acceleration is achievable

Scalar potential significantly affects dark energy dynamics

Abstract

We study the holographic dark energy model in a generalized scalar tensor theory. In a universe filled with cold dark matter and dark energy, the effect of potential of the scalar field is investigated in the equation of state parameter. We show that for a various types of potentials, the equation of state parameter is negative and transition from deceleration to acceleration expansion of the universe is possible.