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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…