A tensor instability in the Eddington inspired Born-Infeld Theory of Gravity

Details A tensor instability in the Eddington inspired Born-Infeld Theory of Gravity A tensor instability in the Eddington inspired Born-Infeld Theory of Gravity

2012-04-07

arxiv.org/abs/1204.1691v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

5 pages, approved by Phys. Rev. D, additional references and minor modifications

Scientific paper

In this paper we consider an extension to Eddington's proposal for the
gravitational action. We study tensor perturbations of a homogeneous and
isotropic space-time in the Eddington regime, where modifications to Einstein
gravity are strong. We find that the tensor mode is linearly unstable deep in
the Eddington regime and discuss its cosmological implications.

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