Pseudo generalized Ricci-recurrent spacetimes and modified gravity

Abstract

In this paper we introduce and characterize a pseudo generalized Ricci-recurrent spacetimes and produce an example to verify the existence of such a spacetime. Then we demonstrate that a conformally flat generalized Ricci-recurrent spacetime with certain condition is a pseudo quasi-Einstein spacetime. Besides, it is proved that a pseudo generalized Ricci-recurrent generalized Robertson-Walker spacetime represents a perfect fluid spacetime. Lastly, we study the impact of this spacetime under $f(\mathcal{R},T^2)$ and $f\left({\mathcal{R}}^{\ast }\right)$ gravity scenario and deduce several energy conditions.

arXiv admin note: substantial text overlap with arXiv:2406.16113