Abstract The Nobel Prize winning confirmation in 1998 of the accelerated expansion of our
Universe put into sharp focus the need of a consistent theoretical model to explain the origin …

Scalar fields have played an important role in the development of the fundamental theories
of physics as well as in other branches of physics such as gravitation and cosmology. For a …

The equations for quintessential α-attractor inflation with a single scalar field, radiation and
matter in a spatially flat FLRW spacetime are recast into a regular dynamical system on a …

We investigate the field equations in the Einstein-aether theory for static spherically
symmetric spacetimes and a perfect fluid source and subsequently with the addition of a …

We discuss dynamical systems approaches and methods applied to flat Robertson-Walker
models in f (R)-gravity. We argue that a complete description of the solution space of a …

We investigate the inflation driven by a nonlinear electromagnetic field based on an NLED
lagrangian density L nled=-F f F, where f F is a general function depending on F. We first …

We examine the phase space of Hořava–Lifshitz cosmology for a wide range of self-
interacting potentials for the scalar field under the detailed-balance condition and without …

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 …

In this work we present a generalized Brans-Dicke lagrangian including a non-minimally
coupled Gauss-Bonnet term without imposing the vanishing torsion condition. In the …

We construct global phase portraits of inflationary dynamics in teleparallel gravity models
with a scalar field nonminimally coupled to torsion scalar. The adopted set of variables can …