%0 Journal Article
%T Dynamical generation of wormholes with charged fluids in quadratic Palatini gravity
%A Lobo, F. S. N.
%A Martinez-Asencio, J.
%A Olmo, G. J.
%A Rubiera-Garcia, D.
%J Physical Review D
%D 2014
%V 90
%N 2
%I Amer Physical Soc
%@ 1550-7998
%G English
%F Lobo_etal2014
%O WOS:000343305600009
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1979), last updated on Thu, 20 Nov 2014 19:23:28 +0000
%X The dynamical generation of wormholes within an extension of General Relativity (GR) containing (Planck's scale-suppressed) Ricci-squared terms is considered. The theory is formulated assuming the metric and connection to be independent (Palatini formalism) and is probed using a charged null fluid as a matter source. This has the following effect: starting from Minkowski space, when the flux is active the metric becomes a charged Vaidya-type one, and once the flux is switched off the metric settles down into a static configuration such that far from the Planck scale the geometry is virtually indistinguishable from that of the standard Reissner-Nordstrom solution of GR. However, the innermost region undergoes significant changes, as the GR singularity is generically replaced by a wormhole structure. Such a structure becomes completely regular for a certain charge-to-mass ratio. Moreover, the nontrivial topology of the wormhole allows us to define a charge in terms of lines of force trapped in the topology such that the density of lines flowing across the wormhole throat becomes a universal constant. In light of our results, we comment on the physical significance of curvature divergences in this theory and the topology change issue, which support the view that space-time could have a foamlike microstructure pervaded by wormholes generated by quantum gravitational effects.
%R 10.1103/PhysRevD.90.024033
%U http://arxiv.org/abs/arXiv:1403.0105
%U https://doi.org/10.1103/PhysRevD.90.024033
%P 024033-15pp