Some of the most important quintessential inflation scenarios, such as the Peebles–Vilenkin
model, are described in detail. These models are able to explain the early-and late-time …

This pedagogical review is devoted to quintessential inflation, which refers to unification of
inflation and dark energy using a single scalar field. We present a brief but concise …

The Einstein static (ES) universe has played a major role in various emergent scenarios
recently proposed in order to cure the problem of the initial singularity of the standard model …

Quintessential inflation provides a unified description of inflation and dark energy in terms of
a single scalar degree of freedom, the cosmon. We present here a comprehensive overview …

An exponential kind of quintessential inflation potential motivated by supergravity is studied.
This type belongs to the class of α-attractor models. The model was studied for the first time …

The discovery of the Universe's late-time acceleration and dark energy has led to a great
deal of research into cosmological singularities, and in this brief review, we discuss all the …

A unification of dark matter and dark energy based on a dynamical spacetime theory is
suggested. By introducing a dynamical spacetime vector field χ μ as a Lagrange multiplier …

A unified multiscalar field model with three flat regions is discussed. The three flat regions
are the inflation, early-and late dark energy epochs. The potential is obtained by a …

From the assumption that the slow-roll parameter ε ε has a Lorentzian form as a function of
the e-fold number N, a successful model of a quintessential inflation is obtained, as …

We consider a modified gravity plus single scalar-field model, where the scalar Lagrangian
couples symmetrically both to the standard Riemannian volume-form (spacetime integration …