73 citations · 855 across the 52 of their papers we have counts for
15 papers · 1 filter
Higher derivative Hořava-Lifshitz fermions: from superconductivity to atomic spectroscopy
A. A. Araújo Filho, K. E. L. de Farias, N. Heidari +2
We investigate an isotropic Hořava-Lifshitz fermion theory supplemented by a dimension-six spatial derivative operator, preserving first order time evolution while modifying the ul…
Charged particles and fields in bumblebee gravity: Periodic orbits and superradiance
Marco A. A. de Paula, Renan B. Magalhães, V. B. Bezerra +1
We investigate the dynamics of charged particles and fields in the background of a charged black hole in bumblebee gravity, aiming to better understand the role played by the Loren…
Light bending and observational bounds in dyonic Kalb-Ramond gravity
A. A. Araújo Filho
We investigate the weak and strong gravitational lensing of a dyonic black hole in Kalb-Ramond gravity. After fixing the asymptotic normalization, we distinguish the effective char…
A general static and spherically symmetric black hole in traceless metric-affine bumblebee gravity
A. A. Araújo Filho, N. Heidari, V. B. Bezerra +1
We construct and analyze a general exact static and spherically symmetric black hole solution in traceless metric-affine bumblebee gravity by considering a vacuum expectation value…
Exploring a phantom Dirac-Born-Infeld regular black hole via particle emission, wave scattering and geodesics
N. Heidari, A. A. Araújo Filho, Iarley P. Lobo +1
We examine particle creation, evaporation, scalar wave absorption and scattering, and geodesic motion in the asymptotically flat regular black hole supported by a phantom Dirac-Bor…
Gravitational Wave Signatures from Periodic Orbits around a Non--commutative Schwarzschild Black Hole
N. Heidari, A. A. Araújo Filho, I. P. Lobo +1
In this work, we investigate massive particle motion and the gravitational wave emission generated by periodic trajectories around a non--commutative \textit{Schwarzschild} black h…
Thermodynamic and statistical properties of a multifractional modified dispersion relation via the grand-canonical ensemble
A. A. Araújo Filho
We study the thermodynamic and statistical properties of a gas governed by a multifractional modified dispersion relation of the form , where $E_{…
Gauge-covariant Raychaudhuri dynamics for spin-nondegenerate Lorentz-violating congruences
A. A. Araújo Filho, A. F. Santos, J. A. A. S. Reis +2
We investigate the Raychaudhuri dynamics of charged spin-nondegenerate Lorentz-violating particle congruences under minimal electromagnetic coupling. The coupling is introduced thr…
Gravitational waves in a minimal gravitational SME
A. A. Araújo Filho, N. Heidari, Iarley P. Lobo
In this work, we investigate the generation and propagation of gravitational waves within a minimal gravitational SME (Standard Model Extension). Starting from the modified gravito…
Gravitational waves in metric-affine bumblebee gravity
A. A. Araújo Filho
We study the propagation and emission of gravitational waves in the metric-affine formulation of the bumblebee model, where spontaneous Lorentz symmetry breaking arises from a vect…
Light propagation and gravitational lensing effects in charged Kalb-Ramond spacetime in nonlinear electrodynamics
C. F. S. Pereira, Marcos V. de S. Silva, A. R. Soares +3
In this work, we theoretically investigate the deflection of light for strong- and weak-field regimes in the background of an electrically charged BH described in Kalb-Ramond gravi…
Quantum features of a non-commutative Schwarzschild black hole
A. A. Araújo Filho, I. P. Lobo, P. H. M. Barros +1
This work aims to present the quantum aspects of a non-commutative gauge gravity formulation of a Schwarzschild-like black hole constructed via the Moyal twist $\partial_t \wedge \…
Light propagation and quasinormal modes of a topologically charged Schwarzschild-Klinkhamer wormhole
C. F. S. Pereira, H. Belich, A. R. Soares +3
In this work, we present a theoretical analysis of null geodesics, critical photon orbits, and shadow formation associated with a wormhole generated by a geometric defect. The prop…
Lorentz-violating modifications to particle dynamics, thermodynamics and vacuum energy in bumblebee gravity
A. A. Araújo Filho, K. E. L. de Farias, E. Passos +5
We investigate how spontaneous Lorentz symmetry breaking in bumblebee gravity modifies particle dynamics, thermodynamics, and vacuum energy around a static black hole background. S…
Fermi Acceleration Mechanisms Beyond Lorentz Symmetry
Gilson A. Ferreira, Erick Aguiar, A. A. Araújo Filho +3
We construct models for first- and second-order Fermi acceleration of particles, incorporating generic frame transformations, dispersion relations, and conservation laws. Within th…