Zobrazeno 1 - 10
of 285
pro vyhledávání: '"Lemos, Jose' P. S."'
The Penrose process, a process that transfers energy from a black hole to infinity, together with the BSW mechanism, which uses collisions of ingoing particles at the event horizon of a black hole to locally produce large amounts of energy, is studie
Externí odkaz:
http://arxiv.org/abs/2411.14528
Autor:
Fernandes, Tiago V., Lemos, José P. S.
We establish the connection between the Gibbons-Hawking Euclidean path integral approach applied to the canonical ensemble of a Reissner-Nordstr\"om black hole and the thermodynamic theory of black holes of Davies. We build the ensemble, characterize
Externí odkaz:
http://arxiv.org/abs/2410.12902
Autor:
Lemos, José P. S., Zaslavskii, Oleg B.
Publikováno v:
Physical Review D 109, 084016 (2024)
In a space with positive cosmological constant $\Lambda$, we consider a black hole surrounded by a heat reservoir at radius $R$ and temperature $T$, i.e., we analyze the Schwarzschild-de Sitter black hole in a cavity. We use the Euclidean path integr
Externí odkaz:
http://arxiv.org/abs/2402.05166
Publikováno v:
Phys. Rev. D 109, 064065 (2024)
The Penrose process for the decay of electrically charged particles in a Reissner-Nordstr\"om-anti-de Sitter black hole spacetime is studied. To extract large quantities of energy one needs to mount a recursive Penrose process where particles are con
Externí odkaz:
http://arxiv.org/abs/2401.13039
Publikováno v:
Phys. Rev. D 109, 064041 (2024)
The normal modes of Proca field perturbations in $d$-dimensional anti-de Sitter spacetime, AdS$_d$ for short, with reflective Dirichlet boundary conditions, are obtained exactly. Within the Ishibashi-Kodama framework, we decompose the Proca field in
Externí odkaz:
http://arxiv.org/abs/2401.13030
Autor:
Fernandes, Tiago V., Lemos, José P. S.
Publikováno v:
Phys. Rev. D 108, 084053 (2023)
The grand canonical ensemble of a $d$-dimensional Reissner-Nordstr\"om black hole space in a cavity is analyzed. The realization of this ensemble is made through the Euclidean path integral approach by giving the Euclidean action for the black hole w
Externí odkaz:
http://arxiv.org/abs/2309.12388
Publikováno v:
Gen. Relativ. Gravit. 55, 65 (2023)
In quadratic gravity, the junction conditions are six and permit the appearance of double layer thin shells. Double layers arise typically in theories with dipoles, i.e., two opposite charges, such as electromagnetic theories, and appear exceptionall
Externí odkaz:
http://arxiv.org/abs/2305.06829
Autor:
Lemos, José P. S., Zaslavskii, O. B.
Publikováno v:
Classical Quantum Gravity 40, 235012 (2023)
We study a spherical black hole surrounded by a hot self-gravitating thin shell in the canonical ensemble, i.e., a black hole and a hot shell inside a heat reservoir acting as a boundary with its area and temperature fixed. To work out the quantum pa
Externí odkaz:
http://arxiv.org/abs/2304.06740
Autor:
Luz, Paulo, Lemos, José P. S.
Publikováno v:
Physical Review D 107, 084004 (2023)
We start by presenting the general set of structure equations for the 1+3 threading spacetime decomposition in 4 spacetime dimensions, valid for any theory of gravitation based on a metric compatible affine connection. We then apply these equations t
Externí odkaz:
http://arxiv.org/abs/2303.03104
Publikováno v:
Gen. Relativ. Gravit. 55, 5 (2023)
A normal mode analysis for Proca fields in the anti-de Sitter (AdS) spacetime is given. It is found that the equations for the Proca field can be decoupled analytically. This is performed by changing the basis of the vector spherical harmonics (VSH)
Externí odkaz:
http://arxiv.org/abs/2301.10248