Recently, the research community has been exploring fractional calculus to address
problems related to cosmology; in this approach, the gravitational action integral is altered …

Scalar field cosmologies with a generalized harmonic potential and a matter fluid with a
barotropic Equation of State (EoS) with barotropic index γ for locally rotationally symmetric …

Abstract For a spatially Friedmann–Lemaître–Robertson–Walker cosmology, we propose a
multi-scalar field gravitational model. Specifically, we consider a two-scalar field …

The paper studies different observational features in the case of a specific cubic gravity
theory, based on third order contractions of the Riemann tensor. Considering viable cosmic …

The paper studies the possible interplay between matter and geometry in scalar tensor
theories of gravitation where the energy–momentum tensor is directly coupled with the …

In this paper, a non‐interacting scalar field cosmology with an arbitrary potential using the f‐
deviser method that relies on the differentiability properties of the potential is investigated …

In this paper, the basic Einstein–Hilbert cosmological model is extended by adding a new
functional F (G, T μ ν T μ ν) in the fundamental action, encoding specific geometrical effects …

The paper extends basic Einstein–Hilbert action by incorporating an invariant derived from a
specific contraction between the Einstein tensor and energy momentum tensor. This …

The paper proposes a novel cosmological model based on a two-field scenario, where the
two fields are independently coupled with a specific invariant, based on cubic contractions of …

We present a novel way to constrain the ghost field with respect to other physical fields
present in a given theory such that the theory becomes quantizable. This is achieved by …