TY  - JOUR
AU  - Lobo, F. S. N.
AU  - Martinez-Asencio, J.
AU  - Olmo, G. J.
AU  - Rubiera-Garcia, D.
PY  - 2014
DA  - 2014//
TI  - Dynamical generation of wormholes with charged fluids in quadratic Palatini gravity
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 024033
EP  - 15pp
VL  - 90
IS  - 2
PB  - Amer Physical Soc
AB  - 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.
SN  - 1550-7998
UR  - http://arxiv.org/abs/arXiv:1403.0105
UR  - https://doi.org/10.1103/PhysRevD.90.024033
DO  - 10.1103/PhysRevD.90.024033
LA  - English
N1  - WOS:000343305600009
ID  - Lobo_etal2014
ER  -