Scalar field cosmology via Noether symmetries in energy–momentum squared gravity

Abstract

This article examines the analytic solutions of isotropic spacetime with the minimal coupling of scalar field and matter in the context of energy–momentum squared gravity. The scalar field includes quintessence and phantom dark energy models. We evaluate solutions of a physical system through the Noether symmetry approach that provide some viable constraints to choose the cosmological models on the basis of current observations. We consider different models of this theory to establish Noether equations, symmetry generators and corresponding conserved quantities. We compute analytic solutions and examine their graphical representation for various cosmological quantities. The behavior of these quantities is found to be consistent with current observations implying that this theory shows expanding behavior of the universe. We find that symmetry generators and their conserved parameters exist in all cases. • Solutions of isotropic spacetime with minimal coupling of scalar field and matter are studied in modified theory. • We evaluate solutions of a physical system through the Noether symmetry approach. • The behavior of physical quantities is found to be consistent with current observations. • We find that symmetry generators and their conserved parameters exist in all cases.