Zobrazeno 1 - 10
of 557
pro vyhledávání: '"Leite, Luiz"'
Federated Learning (FL) has emerged as a machine learning approach able to preserve the privacy of user's data. Applying FL, clients train machine learning models on a local dataset and a central server aggregates the learned parameters coming from t
Externí odkaz:
http://arxiv.org/abs/2409.17767
Publikováno v:
Phys. Rev. D 109, 124037 (2024)
We show that a charged, massive scalar field in the vicinity of an electrically-charged Ay\'on-Beato-Garc\'ia (ABG) regular black hole has a spectrum of quasibound states that (in a certain parameter regime) grow exponentially with time, due to black
Externí odkaz:
http://arxiv.org/abs/2401.14967
Regular black holes (RBHs) -- geometries free from curvature singularities -- arise naturally in theories of non linear electrodynamics. Here we study the absorption, and superradiant amplification, of a monochromatic planar wave in a charged, massiv
Externí odkaz:
http://arxiv.org/abs/2401.01767
Publikováno v:
Phys. Rev. D 108, 084060 (2023)
We study the scattering of axially incident massless scalar waves by a charged and rotating black hole solution from heterotic string theory called the Kerr-Sen black hole. We compute the scattering cross section using the partial wave approach, for
Externí odkaz:
http://arxiv.org/abs/2311.12953
As vigas de rolamento são estruturas destinadas ao suporte de pontes rolantes, estas amplamente utilizadas para movimentação de cargas em galpões industriais. O presente trabalho apresenta um estudo sobre as vigas de rolamento de aço sem conten
Publikováno v:
Eur. Phys. J. C 82, 698 (2022)
We study the scattering of light-like geodesics and massless scalar waves by a static Konoplya-Zhidenko black hole, considering the case that the parametrized black hole solution contains a single deformation parameter. By performing a geodesic analy
Externí odkaz:
http://arxiv.org/abs/2304.12255
Publikováno v:
Eur. Phys. J. Plus 137, 785 (2022)
We investigate the scattering properties of a massless scalar field in the background of a charged Ay\'on-Beato-Garc\'ia regular black hole solution. Using a numerical approach, we compute the differential scattering cross section for arbitrary value
Externí odkaz:
http://arxiv.org/abs/2207.05215
Publikováno v:
Phys. Rev. D 104, 124006 (2021)
Obtaining black hole solutions in alternative theories of gravity can be a difficult task due to cumbersome field equations that arise in many of such theories. In order to study the strong field regime in a model-free approach, one can consider defo
Externí odkaz:
http://arxiv.org/abs/2112.01345
Publikováno v:
Phys. Rev. D 102, 104033 (2020)
Along the last decades, several regular black hole (BH) solutions, i.e., singularity-free BHs, have been proposed and associated to nonlinear electrodynamics models minimally coupled to general relativity. Within this context, it is of interest to st
Externí odkaz:
http://arxiv.org/abs/2011.08633
Publikováno v:
The European Physical Journal C 80 (2020) 386
Black holes are among the most intriguing objects in nature. They are believed to be fully described by General Relativity (GR), and the astrophysical black holes are expected to belong to the Kerr family, obeying the no-hair theorems. Alternative th
Externí odkaz:
http://arxiv.org/abs/2005.04515