The classical generalization of general relativity is considered as the gravitational alternative
for a unified description of the early-time inflation with late-time cosmic acceleration. The …

It is well known that the universe is undergoing a phase of accelerated expansion. Plenty of
models have already been created with the purpose of describing what causes this non …

We study a correspondence between f (R) model of gravity in the Jordan frame and a
phenomenological kind of dark energy (DE), which is known as QCD ghost DE. Since this …

We investigate the corresponding relation between f (R) gravity and holographic dark
energy. We introduce a type of energy density from f (R) that has the same role as …

Determining the cosmological field equations is still very much debated and led to a wide
discussion around different theoretical proposals. A suitable conceptual scheme could be …

We study the f (R) theory of gravity in an anisotropic metric and its effect on the baryon
number-to-entropy ratio. The mechanism of gravitational baryogenesis based on the CPT …

Noether symmetry in the modified theory of gravity with F (R) F (R)-term in the action in the
background of 5-dimensional Kaluza–Klein cosmology yields F (R) ∝ R^ n F (R)∝ R n for …

We introduce a new approach for investigating the weak field limit of vacuum field equations
in f (R) gravity and we find the weak field limit of f (R)= R+ μ 4/R gravity. Furthermore, we …

We study the dynamical evolution of an f (R) model of gravity in a viscous and anisotropic
background which is given by a Bianchi type-I model of the Universe. We find viable forms of …

We investigate the correspondence relation between f (R) gravity and an interacting
holographic dark energy (HDE). By obtaining the conditions needed for some observational …