50 citations · 88 across the 3 of their papers we have counts for
3 papers
Observational constraints of the gravitational waves in the Brans-Dicke theory: Einstein frame and Jordan-Brans-Dicke frame
R. C. Freitas, S. V. B. Gonçalves
We investigate the quantum origin of the primordial cosmological gravitational waves in the Brans-Dicke theory in the two conformally related frames, the Jordan-Brans-Dicke frame a…
Constraints on the Generalized Chaplygin Gas Model from Gamma-Ray Bursts
R. C. Freitas, S. V. B. Gonçalves, H. E. S. Velten
We study the Generalized Chaplygin gas model (GCGM) using Gamma-ray bursts as cosmological probes. In order to avoid the so-called circularity problem we use cosmology-independent…
The dynamics of the early universe and the initial conditions for inflation in a model with radiation and a Chaplygin gas
G. A. Monerat, G. Oliveira-Neto, E. V. Corrêa Silva +6
The modeling of the early universe is done through the quantization of a Friedmann-Robertson-Walker model with positive curvature. The material content consists of two fluids: radi…