Geodesically complete BTZ-type solutions of Born-Infeld gravity
arXiv:1609.05827 · doi:10.1088/1361-6382/aa56f5
Abstract
We study Born-Infeld gravity coupled to a static, nonrotating electric field in dimensions and find exact analytical solutions. Two families of such solutions represent geodesically complete, and hence nonsingular, spacetimes. Another family represents a point-like charge with a singularity at the center. Despite the absence of rotation, these solutions resemble the charged, rotating BTZ solution of General Relativity but with a richer structure in terms of horizons. The nonsingular character of the first two families turn out to be attached to the emergence of a wormhole structure on their innermost region. This seems to be a generic prediction of extensions of General Relativity formulated in metric-affine (or Palatini) spaces, where metric and connection are regarded as independent degrees of freedom.
arXiv comment24 single-column pages, 6 figures
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