Reconstruction of Einstein-Aether Gravity from other Modified Gravity Models

TL;DR

This paper reconstructs Einstein-Aether gravity from various modified gravity models like $f(T)$, $f(R)$, and others, analyzing its viability and stability through correspondence and graphical methods.

Contribution

It introduces a method to reconstruct Einstein-Aether gravity from multiple modified gravity theories and assesses the stability of these models.

Findings

Reconstructed Einstein-Aether gravity functions for different models.

Graphical analysis of $F(K)$ versus $K$ for each case.

Stability analysis confirms viability of reconstructed models.

Abstract

We briefly describe the modified Friedmann equations for Einstein-Aether gravity theory and we find the effective density and pressure. The purpose of our present work is to reconstruction of Einstein-Aether Gravity from other modified gravities like $f(T)$, $f(R)$, $f(G)$, $f(R,T)$ and $f(R,G)$ and check its viability. The scale factor is chosen in power law form. The free function $F(K)$ for Einstein-Aether gravity (where $K$ is proportional to $H^{2}$) have been found in terms for $K$ by the correspondence between Einstein-Aether gravity and other modified gravities and the nature of $F(K)$ vs $K$ have been shown graphically for every cases. Finally, we analyzed the stability of each reconstructed Einstein-Aether gravity model.