110 citations · 400 across the 17 of their papers we have counts for
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Conformal quantum effects and the anisotropic singularities of scalar-tensor theories of gravity
Edgard Gunzig, Alberto Saa
We show that the inclusion of a term in the action can remove the recently described anisotropic singularity occurring on the hypersurface of scalar-ten…
Quantum effects and superquintessence in the new age of precision cosmology
Edgard Gunzig, Alberto Saa
Recent observations of Type Ia supernova at high redshifts establish that the dark energy component of the universe has (a probably constant) ratio between pressure and energy dens…
Stability properties and asymptotics for N non-minimally coupled scalar fields cosmology
L. Brenig, A. Figueiredo, E. Gunzig +2
We consider here the dynamics of some homogeneous and isotropic cosmological models with interacting classical scalar fields non-minimally coupled to the spacetime curvature, a…
A note on dualities in Einstein's gravity in the presence of a non-minimally coupled scalar field
L. R. Abramo, L. Brenig, E. Gunzig +1
We show that the action of Einstein's gravity with a scalar field coupled in a generic way to spacetime curvature is invariant under a particular set of conformal transformations.…
Dynamical study of the singularities of gravity in the presence of non-minimally coupled scalar fields
L. R. Abramo, L. Brenig, E. Gunzig +1
We investigate the dynamics of Einstein equations in the vicinity of the two recently described types of singularity of anisotropic and homogeneous cosmological models described by…
Superinflation and quintessence in the presence of an extra field
A. Figueiredo, T. M. Rocha Filho, E. Gunzig +2
We discuss the implication of the introduction of an extra field to the dynamics of a scalar field conformally coupled to gravitation in a homogeneous isotropic spatially flat univ…