Zobrazeno 1 - 10
of 183
pro vyhledávání: '"Hassaine, Mokhtar"'
Electromagnetized Black Holes and Swirling Backgrounds in Nonlinear Electrodynamics: The ModMax case
This work focuses on constructing electromagnetized black holes and vortex-like backgrounds within the framework of the ModMax theory--the unique nonlinear extension of Maxwell's theory that preserves conformal symmetry and electromagnetic duality in
Externí odkaz:
http://arxiv.org/abs/2409.12336
The gravitational Cheshire effect refers to the possibility of turning off the gravitational field while still leaving an imprint of the nonminimal coupling of matter to gravity. This allows nontrivial solutions in flat spacetime for which no backrea
Externí odkaz:
http://arxiv.org/abs/2408.00086
We study a subclass of Horndeski gravity which has both global conformal and shift symmetries. Global symmetries are characterised by the presence of a conserved current which has been shown to be of particular importance for the integrability featur
Externí odkaz:
http://arxiv.org/abs/2407.11157
Publikováno v:
Eur. Phys. J. C 84, 1011 (2024)
This paper investigates Buchdahl transformations within the framework of Einstein and Einstein-Scalar theories. Specifically, we establish that the recently proposed Schwarzschild-Levi-Civita spacetime can be obtained by means of a Buchdahl transform
Externí odkaz:
http://arxiv.org/abs/2404.12194
Nonlinearly charging the conformally dressed black holes preserving duality and conformal invariance
Publikováno v:
Phys. Rev. D 110, 064027 (2024)
We start this paper by concisely rederiving ModMax, which is nothing but the unique nonlinear extension of Maxwell's equations preserving conformal and duality invariance. The merit of this new derivation is its transparency and simplicity since it i
Externí odkaz:
http://arxiv.org/abs/2404.08753
This work outlines a straightforward mechanism for endorsing primary hair into Schwarzschild black holes, resulting in a unique modification within the framework of a special scalar-tensor theory, the so-called beyond Horndeski type. The derived solu
Externí odkaz:
http://arxiv.org/abs/2312.05207
We consider some classes of Horndeski theories in four dimensions for which a certain combination of the Einstein equations within a spherical ansatz splits into two distinct branches. Recently, for these theories, some integrability and compatibilit
Externí odkaz:
http://arxiv.org/abs/2309.03024
Autor:
Ayón-Beato, Eloy, Hassaine, Mokhtar
Publikováno v:
Annals of Physics 458 (2023) 169446
Jackiw was undoubtedly the first to exhibit an example of a scalar field action which is not conformally invariant whereas its equation of motion is. This feature has recently been dubbed as a non-Noetherian conformal scalar field. The paradigmatic e
Externí odkaz:
http://arxiv.org/abs/2307.04048
Autor:
Ayón-Beato, Eloy, Hassaine, Mokhtar
Publikováno v:
Annals of Physics 460 (2024) 169567
Recently, an extension of the standard four-dimensional scalar conformal action, yielding a second-order field equation that remains conformally invariant, was proposed. In spite of this, the corresponding action is not invariant under conformal tran
Externí odkaz:
http://arxiv.org/abs/2305.09806
Starting from a generalised Kaluza-Klein action including arbitrary Horndeski potentials, we establish integrability and compatibility conditions that solve the generic field equations for spherical symmetry. The resulting theories can be identified
Externí odkaz:
http://arxiv.org/abs/2303.04126