26 citations · 130 across the 10 of their papers we have counts for
10 papers
On the causality aspects of the dynamical Chern-Simons modified gravity
P. J. Porfirio, J. B. Fonseca-Neto, J. R. Nascimento +1
We discuss the Gödel-type solutions within the dynamical Chern-Simons modified gravity in four dimensions. Within our study, we show that in the vacuum case the causal solutions ar…
Chern-Simons modified gravity and closed time-like curves
P. J. Porfirio, J. B. Fonseca-Neto, J. R. Nascimento +3
We verify the consistency of the Gödel-type solutions within the four-dimensional Chern-Simons modified gravity with the non-dynamical Chern-Simons coefficient, for different forms…
An Extension of Teleparallelism and the Geometrization of the Electromagnetic Field
J. B. Formiga, J. B. Fonseca--Neto, C. Romero
As is well known, both Weyl and Weitzenböck spacetimes were initially used as attempts to geometrize the electromagnetic field. In this letter, we prove that this field can also be…
Scalar torsion and a new symmetry of general relativity
J. B. Fonseca-Neto, C. Romero, S. P. G. Martinez
We reformulate the general theory of relativity in the language of Riemann-Cartan geometry. We start from the assumption that the space-time can be described as a non-Riemannian ma…
General Relativity and Weyl Frames
C. Romero, J. B. Fonseca-Neto, M. L. Pucheu
We present the general theory of relativity in the language of a non-Riemannian geometry, namely, Weyl geometry. We show that the new mathematical formalism may lead to different p…
Conformally flat spacetimes and Weyl frames
C. Romero, J. B. Fonseca-Neto, M. L. Pucheu
We discuss the concepts of Weyl and Riemann frames in the context of metric theories of gravity and state the fact that they are completely equivalent as far as geodesic motion is…