Reconstruction of $f(G)$ Gravity with New Agegraphic Dark Energy Model

TL;DR

This paper reconstructs a new agegraphic dark energy model within $f(G)$ gravity, analyzing its implications for cosmic evolution, stability, and its inability to reach the $ ext{Lambda}$CDM phase, highlighting its quintessence-like behavior.

Contribution

It introduces a novel $f(G)$ gravity model based on NADE, exploring its cosmological evolution, stability, and limitations in reaching the standard $ ext{Lambda}$CDM phase.

Findings

The reconstructed model describes a quintessence era with instability.

The model does not reach the $ ext{Lambda}$CDM$ phase according to statefinder analysis.

Stability analysis shows the model is unstable during evolution.

Abstract

In this work, we consider the reconstruction scenario of new agegraphic dark energy (NADE) model and $f(G)$ theory of gravity with $G$ representing the Gauss-Bonnet invariant in the flat FRW spacetime. In this context, we assume a solution of the scale factor in power-law form and study the correspondence scenario. A new agegraphic $f(G)$ model is constructed and discussed graphically for the evolution of the universe. Using this model, we investigate the different eras of the expanding universe and stability with the help of the equation of state (EoS) parameter $\omega_{eff}$ and squared speed of sound $v_s^2$, respectively. It is mentioned here that the reconstructed model represents the quintessence era of the accelerated expansion of the universe with instability. Moreover, the statefinder trajectories are studied and we find out that the model is not capable of reaching the $\Lambda$CDM phase of the universe.