21 citations · 111 across the 14 of their papers we have counts for
14 papers
Electromagnetic radiation from circular orbits in Schwarzschild--de Sitter spacetime
João P. B. Brito, Rafael P. Bernar, Luís C. B. Crispino
We investigate the electromagnetic radiation emitted by a charged particle orbiting a four-dimensional Schwarzschild--de Sitter black hole using a semiclassical approach. We calcul…
Relativistic tidal divergences in circular orbits and the dynamics of light rings
Victor F. C. Vieira, Rafael P. Bernar, Caio F. B. Macedo
Tidal forces acting on orbiting bodies arise from inhomogeneities in the gravitational field, generating stresses that can deform or even disrupt these objects. In this work, we an…
Nonminimally coupled scalar field in Schwarzschild--de Sitter spacetime: Geodesic synchrotron radiation
João P. B. Brito, Rafael P. Bernar, Luís C. B. Crispino
We analyze the scalar radiation emitted by a source interacting with a nonminimally coupled scalar field in four-dimensional Schwarzschild--de Sitter spacetime. We obtain the emiss…
Semiclassical bremsstrahlung from a charge radially falling into a Schwarzschild black hole
João P. B. Brito, Rafael P. Bernar, Atsushi Higuchi +1
A semiclassical investigation of the electromagnetic radiation emitted by a charged particle in a radially freely falling motion in Schwarzschild spacetime is carried out. We use q…
Superradiance and quantum states on black hole space-times
Visakan Balakumar, Rafael Bernar, Elizabeth Winstanley
We consider the definition of the Boulware and Hartle-Hawking states for quantum fields on black hole space-times. The properties of these states on a Schwarzschild black hole have…
Quantization of a charged scalar field on a charged black hole background
Visakan Balakumar, Rafael P. Bernar, Elizabeth Winstanley
We study the canonical quantization of a massless charged scalar field on a Reissner-Nordstrom black hole background. Our aim is to construct analogues of the standard Boulware, Un…
Radiation emitted by a source orbiting a Schwarzschild--anti--de Sitter black hole
J. P. B. Brito, R. P. Bernar, L. C. B. Crispino
We study the scalar radiation emitted by a source orbiting a Schwarzschild--anti--de Sitter black hole in circular geodesics. We obtain the emitted power using quantum field theory…
Quantum superradiance on static black hole space-times
Visakan Balakumar, Rafael P. Bernar, Luis C. B. Crispino +1
We study the quantum analogue of the classical process of superradiance for a massless charged scalar field on a static charged black hole space-time. We show that an "in" vacuum s…
Synchrotron geodesic radiation in Schwarzschild-de Sitter spacetime
João P. B. Brito, Rafael P. Bernar, Luís C. B. Crispino
We analyze the scalar radiation emitted by a source in geodesic circular orbits around a Schwarzschild-de Sitter black hole. We obtain the emitted power using quantum field theory…
Scalar radiation emitted by a source around a spherically symmetric black hole
Rafael Bernar
We analyze the scalar radiation emitted by a source in a circular geodesic orbit around a spherically symmetric black hole. The black hole spacetime considered is quite general, in…
Scalar radiation from a source rotating around a regular black hole
R. P. Bernar, L. C. B. Crispino
The scalar radiation emitted by a source in geodesic circular orbit around a regular Bardeen black hole is analyzed. We use the quantum field theory in curved spacetime framework t…
The Gibbons-Hawking radiation of gravitons in the Poincaré and static patches of de Sitter spacetime
Rafael P. Bernar, Luís C. B. Crispino, Atsushi Higuchi
We discuss the quantization of linearized gravity in the background de Sitter spacetime using a gauge-invariant formalism to write the perturbed gravitational field in the static p…
Gravitational waves emitted by a particle rotating around a Schwarzschild black hole: A semiclassical approach
Rafael P. Bernar, Luís C. B. Crispino, Atsushi Higuchi
We analyze the gravitational radiation emitted from a particle in circular motion around a Schwarzschild black hole using the framework of quantum field theory in curved spacetime…
Infrared-finite graviton two-point function in static de Sitter space
Rafael P. Bernar, Luís C. B. Crispino, Atsushi Higuchi
We study quantum gravitational perturbations in the static patch of de Sitter space. In particular, we determine the symplectic inner product of these perturbations and use it to w…