Journal
PHYSICAL REVIEW LETTERS
Volume 109, Issue 25, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.251102
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Funding
- FCT-Portugal [PTDC/FIS/098025/2008, PTDC/FIS/098032/2008, CERN/FP/123593/2011]
- European Community through the Intra-European Marie Curie Contract [aStronGR-2011-298297]
- Marie Curie Career Integration Grant [LIMITSOFGR-2011-TPS]
- Young SISSA Scientists Research Project
- European Union's ERC [306425]
- Fundação para a Ciência e a Tecnologia [CERN/FP/123593/2011] Funding Source: FCT
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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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