Zobrazeno 1 - 10
of 113
pro vyhledávání: '"Vieira, H. S."'
Publikováno v:
Universe 10, 267 (2024)
In this paper, we examine the role played by topology, and some specific boundary conditions as well, on the physics of a higher-dimensional black hole. We analyze the line element of a five-dimensional non-extremal Reissner-Nordstr\"{o}m black hole
Externí odkaz:
http://arxiv.org/abs/2310.08518
Publikováno v:
Phys. Rev. D 107, 104038 (2023)
Analog models of black holes have unequivocally proven to be extremely beneficial in providing critical information regarding black hole spectroscopy, superradiance, quantum phenomena and most importantly Hawking radiation and black hole evaporation;
Externí odkaz:
http://arxiv.org/abs/2301.11480
Autor:
Vieira, H. S.
Publikováno v:
Phys. Rev. D 107, 104011 (2023)
In this work we analyze the sound perturbation of Unruh's acoustic effective geometry in both (2+1) and (3+1) spacetime dimensions and present an exact analytical expression for the quasibound states of these idealized black-hole configurations by us
Externí odkaz:
http://arxiv.org/abs/2212.13590
Publikováno v:
Eur. Phys. J. C (2022) 82:669
We examine the interaction between massless scalar fields and the gravitational field generated by a black hole solution that was recently obtained in the consistent well-defined 4-dimensional Einstein-Gauss-Bonnet gravity with a cosmological constan
Externí odkaz:
http://arxiv.org/abs/2205.15613
Publikováno v:
Phys. Rev. D 105, 045015 (2022)
Astrophysical black holes are generally surrounded by accretion disks, galactic matter and the omnipresent cosmic microwave background radiation, thus allowing for the concurrent propagation of both gravitational and sound waves. Recently, acoustic b
Externí odkaz:
http://arxiv.org/abs/2112.08711
Autor:
Vieira, H. S.
Publikováno v:
Eur. Phys. J. C (2021) 81:1143
In this work, we follow the recently revisited f(R) theory of gravity for studying the interaction between quantum scalar particles and the gravitational field of a generalized black hole with an f(R) global monopole. This background has a term playi
Externí odkaz:
http://arxiv.org/abs/2110.10424
Autor:
Abu-Saleem, M., Vieira, H. S.
Publikováno v:
Annals of Physics 433 (2021) 168583
In this work we explore some mathematical physics aspects of the spherically symmetric Lovelock black hole in high dimensions. Intended for this aim, we thoroughly consider the metric corresponding to the five-dimensional Lovelock black hole spacetim
Externí odkaz:
http://arxiv.org/abs/2108.06950
Publikováno v:
Eur. Phys. J. C 82, 932 (2022)
We investigate the quasibound states of charged massive scalar fields in the Kerr-Newman black hole spacetime by using a new approach recently developed, which uses the polynomial conditions of the Heun functions. We calculate the resonant frequencie
Externí odkaz:
http://arxiv.org/abs/2107.02562
Autor:
Vieira, H. S.
Publikováno v:
Universe 2023, 9(5), 205
We examine the interaction between quantum test particles and the gravitational field generated by a black hole solution that was recently obtained in the consistent 4-dimensional Einstein-Gauss-Bonnet gravity. While quasinormal modes of scalar, elec
Externí odkaz:
http://arxiv.org/abs/2107.02065
In this paper, we investigate the simplest wormhole solution - the Ellis-Bronnikov one - in the context of the Asymptotically Safe Gravity (ASG) at the Planck scale. We work with three models, which employ Ricci scalar, Kretschmann scalar, and square
Externí odkaz:
http://arxiv.org/abs/2106.02476