6 citations · 12 across the 5 of their papers we have counts for
6 papers
Scalar Laplace-Beltrami harmonics and curvature-induced radial mode mixing in Friedmann-like cosmologies
Eduardo Bittencourt, Peter K. S. Dunsby, Bob Osano +1
We develop a harmonic framework for spherically symmetric Friedmann-like geometries with constant scalar curvature but non-zero trace-free Ricci curvature. This preserves Friedmann…
Nonlinear electrodynamics in magnetars: systematic effects on radius constraints and timing analysis
Gabriel A. Porto, Jonas P. Pereira, Eduardo Bittencourt +1
Magnetars are among the most extreme laboratories in the universe, harboring surface magnetic fields reaching ~G. At these supercritical scales, Maxwell's linear electrody…
Metric-Induced Principal Symbols in Nonlinear Electrodynamics
Érico Goulart, Eduardo Bittencourt
We present a geometrical formulation of nonlinear electrodynamics by expressing its principal symbol as an optical metric-induced object. Under the assumption of no birefringence,…
Mimicking a rotating black hole with nonlinear electrodynamics
Érico Goulart, Eduardo Bittencourt
We exhibit the first analogue model of a rotating black hole constructed in the framework of nonlinear electrodynamics. The background electromagnetic field is assumed to be algebr…
Photon traps in nonlinear electrodynamics
Érico Goulart, Eduardo Bittencourt
We demonstrate the existence of photon traps within the framework of nonlinear electrodynamics. The trapping mechanism is based on the fact that, for null background fields, the op…
Feasibility of singularity avoidance for a collapsing object due to a scalar field
Eduardo Bittencourt, Alan G. Cesar, Jonas P. Pereira
We study the problem of the gravitational collapse of an object as seen by an external observer. We assume that the resultant spacetime is a match of an external Vaidya spacetime w…