%0 Journal Article
%T Wormholes and nonsingular spacetimes in Palatini f(R) gravity
%A Bambi, C.
%A Cardenas-Avendano, A.
%A Olmo, G. J.
%A Rubiera-Garcia, D.
%J Physical Review D
%D 2016
%V 93
%N 6
%I Amer Physical Soc
%@ 2470-0010
%G English
%F Bambi_etal2016
%O WOS:000371742700005
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2575), last updated on Fri, 01 Apr 2016 22:06:26 +0000
%X We reconsider the problem of f(R) theories of gravity coupled to Born-Infeld theory of electrodynamics formulated in a Palatini approach, where metric and connection are independent fields. By studying electrovacuum configurations in a static and spherically symmetric spacetime, we find solutions which reduce to their Reissner-Nordstrom counterparts at large distances but undergo important nonperturbative modifications close to the center. Our new analysis reveals that the pointlike singularity is replaced by a finite-size wormhole structure, which provides a geodesically complete and thus nonsingular spacetime, despite the existence of curvature divergences at the wormhole throat. Implications of these results, in particular for the cosmic censorship conjecture, are discussed.
%R 10.1103/PhysRevD.93.064016
%U http://arxiv.org/abs/1511.03755
%U https://doi.org/10.1103/PhysRevD.93.064016
%P 064016-8pp