Surface Singularities in Eddington-Inspired Born-Infeld Gravity

Paolo Pani and Thomas P. Sotiriou
Phys. Rev. Lett. 109, 251102 – Published 18 December 2012

Abstract

Eddington-inspired Born-Infeld gravity was recently proposed as an alternative to general relativity that offers a resolution of spacetime singularities. The theory differs from Einstein’s gravity only inside matter due to nondynamical degrees of freedom, and it is compatible with all current observations. We show that the theory is reminiscent of Palatini f(R) gravity and that it shares the same pathologies, such as curvature singularities at the surface of polytropic stars and unacceptable Newtonian limit. This casts serious doubt on its viability.

  • Received 21 September 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.251102

© 2012 American Physical Society

Authors & Affiliations

Paolo Pani1 and Thomas P. Sotiriou2

  • 1CENTRA, Departamento de Física, Instituto Superior Técnico, Universidade Técnica de Lisboa—UTL, Avenida Rovisco Pais 1, 1049 Lisboa, Portugal
  • 2SISSA, Via Bonomea 265, 34136 Trieste, Italy and INFN, Sezione di Trieste, Italy

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Issue

Vol. 109, Iss. 25 — 21 December 2012

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