We consider a nonsingular origin for the universe starting from an Einstein static universe,
the so-called" emergent universe" scenario, in the framework of a theory which uses two …

A new class of gravity–matter models defined in terms of two independent non-Riemannian
volume forms (alternative generally covariant integration measure densities) on the space …

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 …

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 …

A two scalar field model that incorporates non Riemannian Measures of integration or
usually called Two Measures Theory (TMT) is introduced, in order to unify the early and …

There is great interest in the construction of brane worlds, where matter and gravity are
forced to be effective only in a lower dimensional surface, the brane. How these could …

We show that dark energy and dark matter can be described simultaneously by ordinary
Einstein gravity interacting with a single scalar field provided the scalar field Lagrangian …

Complexifying space time has many interesting applications, from the construction of higher
dimensional unification, to provide a useful framework for quantum gravity and to better …

The dilaton-gravity sector of a linear in the scalar curvature, scale invariant Two Measures
Field Theory (TMT), is explored in detail in the context of closed FRW cosmology and shown …

The use in the action integral of totally divergent densities in generally coordinate invariant
theories can lead to interesting mechanisms of spontaneous symmetry breaking of scale …