@Article{Guendelman_etal2013,
author="Guendelman, E. I.
and Olmo, G. J.
and Rubiera-Garcia, D.
and Vasihoun, M.",
title="Nonsingular electrovacuum solutions with dynamically generated cosmological constant",
journal="Physics Letters B",
year="2013",
publisher="Elsevier Science Bv",
volume="726",
number="4-5",
pages="870--875",
optkeywords="Modified gravity; Palatini formalism; Nonlinear electrodynamics; Dynamical cosmological constant; Nonsingular solutions; Wormholes",
abstract="We consider static spherically symmetric configurations in a Palatini extension of General Relativity including R-2 and Ricci-squared terms, which is known to replace the central singularity by a wormhole in the electrovacuum case. We modify the matter sector of the theory by adding to the usual Maxwell term a nonlinear electromagnetic extension which is known to implement a confinement mechanism in flat space. One feature of the resulting theory is that the nonlinear electric field leads to a dynamically generated cosmological constant. We show that with this matter source the solutions of the model are asymptotically de Sitter and possess a wormhole topology. We discuss in some detail the conditions that guarantee the absence of singularities and of traversable wormholes.",
optnote="WOS:000327907000045",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1680), last updated on Thu, 23 Jan 2014 11:54:33 +0000",
issn="0370-2693",
doi="10.1016/j.physletb.2013.09.039",
opturl="http://arxiv.org/abs/1306.6769",
opturl="https://doi.org/10.1016/j.physletb.2013.09.039",
archivePrefix="arXiv",
eprint="1306.6769",
language="English"
}