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

Abstract

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.

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

References in corpus (4)

• Eddington-Born-Infeld gravity and the large scale structure of the Universe
• The dynamics of generalized Palatini Theories of Gravity
• A note on bigravity and dark matter
• Processing of Cosmological Perturbations in a Cyclic Cosmology

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