A. Saa

activity

19932009

most citedOverspinning a nearly extreme black hole and the Weak Cosmic Censorship conjecture

62 citations · 280 across the 20 of their papers we have counts for

collaborators

Showing 2004Show all

3 papers · 1 filter

astro-ph2004

Non-minimal coupling, exponential potentials and the $w < - 1$ regime of dark energy

Fabio C. Carvalho, Alberto Saa

Recent observations and theoretical considerations have motivated the study of models for dark energy with equation of state characterized by a parameter $w = p / ρ < - 1$ . Such models, h…

gr-qc2004

On the viability of local criteria for chaos

Alberto Saa

We consider here a recently proposed geometrical criterion for local instability based on the geodesic deviation equation. Although such a criterion can be useful in some cases, we…

gr-qc2004

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 $C_{ab c d} C^{ab c d}$ in the action can remove the recently described anisotropic singularity occurring on the hypersurface $F (ϕ) = 0$ of scalar-ten…

Non-minimal coupling, exponential potentials and the w<−1 regime of dark energy

On the viability of local criteria for chaos

Conformal quantum effects and the anisotropic singularities of scalar-tensor theories of gravity

Non-minimal coupling, exponential potentials and the $w < - 1$ regime of dark energy