1.3k citations · 3.1k across the 17 of their papers we have counts for
17 papers
Radiation in (2+1)-dimensions
Mauricio Cataldo, Alberto A. García
In this paper we discuss the radiation equation of state in (2+1)-dimensions. In (3+1)-dimensions the equation of state may be used to describe either actual electr…
The Conformal Stealth of any Standard Cosmology
Eloy Ayón-Beato, Alberto A. García, Pedro Isaac Ramírez-Baca +1
It is shown that any homogeneous and isotropic universe, independently of its spatial topology and matter content, allows for the presence of a conformal stealth, i.e. a nontrivial…
Motion of test particles in a regular black hole space--time
Alberto García, Eva Hackmann, Jutta Kunz +2
We consider the motion of test particles in the regular black hole space-time given by Ayón-Beato and Garc\'ıa in Phys. Rev. Lett. 80:5056 (1998). The complete set of orbits for ne…
Conformally Flat Noncircular Spacetimes
Eloy Ayón-Beato, Cuauhtemoc Campuzano, Alberto García
The general metric for conformally flat stationary cyclic symmetric noncircular spacetimes is explicitly given. In spite of the complexity introduced by the inclusion of noncircula…
Further evidences for a generic Universe
C. A. Terrero-Escalante, A. A. Garcia
Recently it was argued that an inflationary potential yielding power spectra characterized by a scale-invariant tensorial spectral index and a weakly scale-dependent scalar spectra…
Static Black Holes of Metric-Affine Gravity in the Presence of Matter
Eloy Ayón-Beato, Alberto García, Alfredo Macías +1
We investigate spherically symmetric and static gravitational fields representing black hole configurations in the framework of metric-affine gauge theories of gravity (MAG) in the…
Revisiting the calculations of inflationary perturbations
C. A. Terrero-Escalante, D. J. Schwarz, A. A. Garcia
We present a new approximation scheme that allows us to increase the accuracy of analytical predictions of the power spectra of inflationary perturbations for two specific classes…
Note on Scalar Fields Non-Minimally Coupled to (2+1)-Gravity
Eloy Ayón-Beato, Alberto García, Alfredo Macías +1
Scalar fields non--minimally coupled to (2+1)-gravity, in the presence of cosmological constant term, are considered. Non-minimal couplings are described by the term in th…
Inflationary scenarios with scale-invariant spectral tensorial index
César A. Terrero-Escalante, Eloy Ayón-Beato, Alberto A. García
Next-to-leading order expressions related to Stewart-Lyth inverse problem are used to determine the inflationary models with a tensorial power spectrum described by a scale-invaria…
The Bardeen Model as a Nonlinear Magnetic Monopole
Eloy Ayón-Beato, Alberto García
The Bardeen model -- the first regular black hole model in General Relativity -- is reinterpreted as the gravitational field of a nonlinear magnetic monopole, i.e., as a magnetic s…
On the Stewart-Lyth Inverse Problem
Eloy Ayón-Beato, Alberto García, Ricardo Mansilla +1
In this paper the Stewart-Lyth inverse problem is rewritten using the comoving scales as the basic parameter. It is shown that some information on the inflaton potential can be obt…
(2+1)-Dimensional Black Hole with Coulomb-like Field
M. Cataldo, N. Cruz, S. del Campo +1
A (2+1)-static black hole solution with a nonlinear electric field is derived. The source to the Einstein equations is a nonlinear electrodynamics, satisfying the weak energy condi…
Stewart-Lyth Inverse Problem
Eloy Ayón-Beato, Alberto García, Ricardo Mansilla +1
In this paper the Stewart-Lyth inverse problem is introduced. It consists of solving two non-linear differential equations for the first slow-roll parameter and finding the inflato…
New Regular Black Hole Solution from Nonlinear Electrodynamics
Eloy Ayón-Beato, Alberto García
Using a nonlinear electrodynamics coupled to General Relativity a new regular exact black hole solution is found. The nonlinear theory reduces to the Maxwell one in the weak limit,…
Uniqueness theorems for static black holes in metric-affine gravity
Eloy Ayón-Beato, Alberto García, Alfredo Macías +1
Using the equivalence theorem for the triplet ansatz sector of metric-affine gravity (MAG) theories and the Einstein-Proca system, it is shown that the only static black hole of th…
Regular Black Hole in General Relativity Coupled to Nonlinear Electrodynamics
Eloy Ayón-Beato, Alberto García
The first regular exact black hole solution in General Relativity is presented. The source is a nonlinear electrodynamic field satisfying the weak energy condition, which in the li…
Colliding waves in metric-affine gravity
Alberto García, Claus Lämmerzahl, Alfredo Macías +2
We generalize the formulation of the colliding gravitational waves to metric-affine theories and present an example of such kind of exact solutions. The plane waves are equipped wi…