Zobrazeno 1 - 10
of 489
pro vyhledávání: '"Kruglov, S P"'
Autor:
Kruglov, S. I.
The heat engine of magnetic black holes in Einstein-AdS gravity coupled to rational nonlinear electrodynamics, as the working substance, is studied. The dynamical negative cosmological constant is considered as a thermodynamic pressure. We investigat
Externí odkaz:
http://arxiv.org/abs/2411.15161
Autor:
Kruglov, S. I.
Publikováno v:
Universe, Vol.9(10), 456 (2023)
We study Einstein's gravity with negative cosmological constant coupled to nonlinear electrodynamics proposed earlier. The metric and mass functions and corrections to the Reissner--Nordstr\"{o}m solution are obtained. Black hole solutions can have o
Externí odkaz:
http://arxiv.org/abs/2408.04714
Autor:
Kruglov, S. I.
Einstein's gravity in AdS space coupled to nonlinear electrodynamics (NED) with two parameters is studied. We investigate magnetically charged black holes. The metric and mass functions and their asymptotic are obtained showing that black holes may h
Externí odkaz:
http://arxiv.org/abs/2407.14534
Autor:
Kruglov, S. I.
Publikováno v:
Entropy, Vol. 26, No. 3, 261 (2024)
We study Einstein's gravity coupled to nonlinear electrodynamics with two parameters in Anti-de Sitter spacetime. Magnetically charged black holes in an extended phase space is investigated. We obtain the mass and metric functions, their asymptotic a
Externí odkaz:
http://arxiv.org/abs/2405.13210
Autor:
Kruglov, S. I.
Publikováno v:
Eur.Phys.J.C 84 (2024) 2, 205
WE analyse the universe inflation when the source of gravity is electromagnetic fields obeying nonlinear electrodynamics with two parameters and without singularities. The cosmology of the universe with stochastic magnetic fields is considered. The c
Externí odkaz:
http://arxiv.org/abs/2403.17043
Autor:
Paul, Prosenjit, Kruglov, S. I.
Publikováno v:
International Journal of Geometric Methods in Modern Physics (2024)
We investigate Einstein-Gauss-Bonnet (EGB) 4D massive gravity coupled to nonlinear electrodynamics (NED) in an Anti-de-Sitter (AdS) background and find an exact magnetically charged black hole solution. The metric function was analyzed for different
Externí odkaz:
http://arxiv.org/abs/2403.02056
Autor:
Kruglov, S. I.
Publikováno v:
Can. J. Phys. Vol. 101, No. 12 (2023), pp. 739-748
Einstein's gravity in AdS space coupled to nonlinear electrodynamics is studied. We analyse the metric, mass functions and corrections to the Reissner-Nordstrom solution. Magnetic black holes thermodynamics in extended phase space is investigated. We
Externí odkaz:
http://arxiv.org/abs/2401.15115
Autor:
Kruglov, S. I.
The modified $F(R)$ gravity theory with the function $F(R)=-(1/\beta)\ln(1-\beta R)$ is studied. The action at small coupling $\beta$ becomes Einstein--Hilbert action. The bound on the parameter $\beta$ from local tests is $\beta\leq 2\times 10^{-6}$
Externí odkaz:
http://arxiv.org/abs/2304.09106
Autor:
Kruglov, S. I.
Publikováno v:
Gravitation and Cosmology, Vol. 29, No. 1 (2023), pp. 57-61
The process of the Joule-Thomson adiabatic expansion within RNED-AdS spacetime is investigated. The isenthalpic P-T diagrams and the inversion temperature were depicted. The inversion temperature depends on the magnetic charge and RNED coupling const
Externí odkaz:
http://arxiv.org/abs/2304.02121
Autor:
Paul, Prosenjit, Kruglov, S. I.
Publikováno v:
Indian Journal of Physics 98, (2024)
We investigate electrically charged black holes in $(2+1)$ dimensional gravity coupled to nonlinear electrodynamics (NED). The metric function $f(r)$ is depicted, showing that there can be one or two horizons. We study black hole thermodynamics in ex
Externí odkaz:
http://arxiv.org/abs/2302.05704