From the 1 of 6 linked papers with an AI index.
6 papers
Gauge-covariant Raychaudhuri dynamics for spin-nondegenerate Lorentz-violating congruences
A. A. Araújo Filho, A. F. Santos, J. A. A. S. Reis +2
The paper derives a gauge‑covariant form of the Raychaudhuri equation for charged particle congruences with Lorentz‑violating dispersion relations, showing how electromagnetic fiel…
Diffeomorphism-Like Symmetry in Gravitoelectromagnetism
L. A. S. Evangelista, A. F. Santos
Gravitoelectromagnetism in the Weyl formalism is investigated through an analysis of the consequences of a restricted gauge symmetry acting on the tensor field . The prop…
Are There Closed Timelike Curves in -Gravity?
Faizuddin Ahmed, A. F. Santos
A modified gravitational model whose action is given by an arbitrary function of the Ricci scalar, the matter Lagrangian density, a scalar field, and its kinetic term is investigat…
Thermal and spatial confinement effects in Podolsky electrodynamics
L. H. A. R. Ferreira, A. F. Santos
In this work, Podolsky theory, a second-order, Lorentz- and gauge-invariant extension of classical electrodynamics, is considered. The effects of Podolsky's modification on fundame…
Causality Violating Solutions in Curvature-Squared Gravity
J. C. R. de Souza, A. F. Santos, R. Bufalo
In this paper, we consider some causality violating solutions in the curvature-squared gravity in order to examine whether closed timelike curves (CTCs) are allowed in these models…
Causality and its violation in gravity
L. A. S. Evangelista, M. L. R. Silva, J. V. Moretti +1
A modified gravitational model whose action is given by an arbitrary function of the Ricci scalar, the matter Lagrangian density, a scalar field, and its kinetic term is investigat…