Holographic Dark Energy Models and Higher Order Generalizations in Dynamical Chern-Simons Modified Gravity

TL;DR

This paper explores various holographic dark energy models within Chern-Simons modified gravity, deriving scale factor solutions and analyzing their evolution, which resembles the behavior of modified Chaplygin gas in certain models.

Contribution

It introduces higher order generalizations of holographic dark energy models in Chern-Simons gravity and derives explicit scale factor solutions for these models.

Findings

Scale factor evolution similar to modified Chaplygin gas in some models

Explicit expressions for scale factor in different holographic dark energy models

Demonstrates the viability of holographic dark energy in Chern-Simons gravity

Abstract

Dark Energy models are here investigated and studied in the framework of the Chern-Simons modified gravity model. We bring into focus the Holographic Dark Energy (HDE) model with Granda-Oliveros cut-off, the Modified Holographic Ricci Dark Energy (MHRDE) model and, moreover, a model with higher derivatives of the Hubble parameter as well. The relevant expressions of the scale factor a(t) for a Friedmann-Robertson-Walker Universe are derived and studied, and in this context, the evolution of the scale factor is shown to be similar to that one displayed by the modified Chaplygin gas in two of the above models.