Eddington's theory of gravity and its progeny

Details Eddington's theory of gravity and its progeny Eddington's theory of gravity and its progeny

2010-06-09

arxiv.org/abs/1006.1769v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

4 Pages, 2 Figures, Accepted to PRL

Scientific paper

We resurrect Eddington's proposal for the gravitational action in the presence of a cosmological constant and extend it to include matter fields. We show that the Newton-Poisson equation is modified in the presence of sources and that charged black holes show great similarities with those arising in Born-Infeld electrodynamics coupled to gravity. When we consider homogeneous and isotropic space-times we find that there is a minimum length (and maximum density) at early times, clearly pointing to an alternative theory of the Big Bang. We thus argue that the modern formulation of Eddington's theory, Born-Infeld gravity, presents us with a novel, non-singular description of the Universe.

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