Connecting the nonsingular origin of the universe, the vacuum structure and the cosmological constant problem
EI Guendelman, P Labrana - International Journal of Modern …, 2013 - World Scientific
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 …
the so-called" emergent universe" scenario, in the framework of a theory which uses two …
Emergent cosmology, inflation and dark energy
E Guendelman, R Herrera, P Labrana… - General Relativity and …, 2015 - Springer
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 …
volume forms (alternative generally covariant integration measure densities) on the space …
Unifying inflation with early and late dark energy with multiple fields: Spontaneously broken scale invariant two measures theory
E Guendelman, R Herrera, D Benisty - Physical Review D, 2022 - APS
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 …
are the inflation, early-and late dark energy epochs. The potential is obtained by a …
Unified dark energy and dust dark matter dual to quadratic purely kinetic K-essence
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 …
couples symmetrically both to the standard Riemannian volume-form (spacetime integration …
Unification: Emergent universe followed by inflation and dark epochs from multi-field theory
E Guendelman, R Herrera - Annals of Physics, 2024 - Elsevier
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 …
usually called Two Measures Theory (TMT) is introduced, in order to unify the early and …
Light like segment compactification and braneworlds with dynamical string tension
EI Guendelman - The European Physical Journal C, 2021 - Springer
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 …
forced to be effective only in a lower dimensional surface, the brane. How these could …
Dark energy and dark matter from hidden symmetry of gravity model with a non-Riemannian volume form
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 …
Einstein gravity interacting with a single scalar field provided the scalar field Lagrangian …
Holomorphic general coordinate invariant modified measure gravitational theory
E Guendelman - Annals of Physics, 2023 - Elsevier
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 …
dimensional unification, to provide a useful framework for quantum gravity and to better …
Emergent universe from scale invariant two measures theory
S Del Campo, EI Guendelman, AB Kaganovich… - Physics Letters B, 2011 - Elsevier
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 …
Field Theory (TMT), is explored in detail in the context of closed FRW cosmology and shown …
[HTML][HTML] Scale symmetry breaking from total derivative densities and the cosmological constant problem
EI Guendelman, H Nishino, S Rajpoot - Physics Letters B, 2014 - Elsevier
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 …
theories can lead to interesting mechanisms of spontaneous symmetry breaking of scale …