6533b86cfe1ef96bd12c80da
RESEARCH PRODUCT
Wormholes and nonsingular spacetimes in Palatinif(R)gravity
Diego Rubiera-garciaDiego Rubiera-garciaGonzalo J. OlmoGonzalo J. OlmoCosimo BambiCosimo BambiAlejandro Cardenas-avendañosubject
High Energy Physics - TheoryPhysicsGeodesicSpacetime010308 nuclear & particles physicsCosmic censorship hypothesisFOS: Physical sciencesGeneral Relativity and Quantum Cosmology (gr-qc)01 natural sciencesSpherically symmetric spacetimeGeneral Relativity and Quantum CosmologyGeneral Relativity and Quantum CosmologyClassical mechanicsSingularityHigh Energy Physics - Theory (hep-th)Born–Infeld model0103 physical sciencesf(R) gravityWormhole010303 astronomy & astrophysicsMathematical physicsdescription
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 space-time, we find solutions which reduce to their Reissner-Nordstr\"om counterparts at large distances but undergo important non-perturbative modifications close to the center. Our new analysis reveals that the point-like singularity is replaced by a finite-size wormhole structure, which provides a geodesically complete and thus nonsingular space-time, despite the existence of curvature divergences at the wormhole throat. Implications of these results, in particular for the cosmic censorship conjecture, are discussed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-11-11 | Physical Review D |