Some dark energy cosmological models in [formula omitted] gravity

Abstract

In this paper, locally rotationally symmetric Bianchi type-I cosmological models in f(R,ϕ) theory of gravity have been investigated, where R and ϕ are Ricci scalar and scalar potential function, respectively. Some exact solutions pertaining to the dark energy and the cosmic expansion have been found by implementing the power law model f(R,ϕ)=λRm+1+βϕl+1, with λ,m, β and l being the arbitrary real constants, such that m,β≠−1 for the sake of non-triviality. Some important physical attributes like the pressure, energy density, equation of the state parameter, skewness parameter and energy conditions have been studied and analysed graphically. It has been concluded that both of the models are favorable for cosmic expansion. Furthermore, expansion of universe may be justified in f(R,ϕ) gravity under these models.