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Surface Singularities in Eddington-Inspired Born-Infeld Gravity

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

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Archivio istituzionale della ricerca - Università di Cagliari

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Last time updated on 12/11/2016

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