172 citations · 2.5k across the 84 of their papers we have counts for
5 papers · 1 filter
Covariant Bardeen Perturbation Formalism
S. D. P. Vitenti, F. T. Falciano, N. Pinto-Neto
In a previous work we obtained a set of necessary conditions for the linear approximation in cosmology. Here we discuss the relations of this approach with the so called covariant…
Consistent Probabilities in Perfect Fluid Quantum Universes
Clécio R. Bom, Nelson Pinto-Neto, Grasiele B. Santos
Recently it has been claimed that the Wheeler-DeWitt quantization of gravity is unable to avoid cosmological singularities. However, in order to make this assertion, one must speci…
Quantum cosmology from the de Broglie-Bohm perspective
N. Pinto-Neto, J. C. Fabris
We review the main results that have been obtained in quantum cosmology from the perspective of the de Broglie-Bohm quantum theory. As it is a dynamical theory of assumed objective…
Scalar Field Perturbations with Arbitrary Potentials in Quantum Backgrounds
F. T. Falciano, Nelson Pinto-Neto, Sandro Dias Pinto Vitenti
In this paper it is shown how to obtain, without ever using the background classical equations of motion, a simple second order Hamiltonian involving the Mukhanov-Sasaki variable d…
Bouncing Model in Brane World Theory
Rodrigo Maier, Nelson Pinto-Neto, Ivano Damião Soares
We examine the nonlinear dynamics of a closed Friedmann-Robertson-Walker universe in the framework of Brane World formalism with a timelike extra dimension. In this scenario, the F…