Nonsingular black holes in Palatini extensions of General Relativity
arXiv:1607.06670 · doi:10.1007/978-3-319-31352-8_5
Abstract
An introduction to extended theories of gravity formulated in metric-affine (or Palatini) spaces is presented. Focusing on spherically symmetric configurations with electric fields, we will see that in these theories the central singularity present in General Relativity is generically replaced by a wormhole structure. The resulting space-time becomes geodesically complete and, therefore, can be regarded as non-singular. We illustrate these properties considering two different models, namely, a quadratic theory and a Born-Infeld like gravity theory.
arXiv comment37 pages, 3 figures. Lecture notes published as a chapter in the book "Theoretical Frontiers in Black Holes and Cosmology", Springer Proceedings in Physics, Eds. R. Kallosh and E. Orazi, (2016)
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