Singularity-free and cosmologically viable born-infeld gravity with scalar matter

David Benisty, Gonzalo J. Olmo, Diego Rubiera-Garcia

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


The early cosmology, driven by a single scalar field, both massless and massive, in the context of Eddington-inspired Born-Infeld gravity, is explored. We show the existence of nonsingular solutions of bouncing and loitering type (depending on the sign of the gravitational theory’s parameter, ɛ) replacing the Big Bang singularity, and discuss their properties. In addition, in the massive case, we find some new features of the cosmological evolution depending on the value of the mass parameter, including asymmetries in the expansion/contraction phases, or a continuous transition between a contracting phase to an expanding one via an intermediate loitering phase. We also provide a combined analysis of cosmic chronometers, standard candles, BAO, and CMB data to constrain the model, finding that for roughly |ɛ| < 5 · 10−8 m2 the model is compatible with the latest observations while successfully removing the Big Bang singularity. This bound is several orders of magnitude stronger than the most stringent constraints currently available in the literature.

Original languageEnglish
Article number2108
Issue number11
StatePublished - 1 Nov 2021
Externally publishedYes


  • Born-infeld gravity
  • Metric-affine gravity
  • Non-singular cosmologies
  • Observational constraints
  • Scalar fields

ASJC Scopus subject areas

  • Computer Science (miscellaneous)
  • Chemistry (miscellaneous)
  • General Mathematics
  • Physics and Astronomy (miscellaneous)


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