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Status: Unchecked ×Keyword: cosmological singularity ×Clear all

2 claims from 1 paper

1. Physics and Astronomy › Cosmology and Gravitation Theories

   Insights in f ( Q ) cosmology: the relevance of the connection

   Ayuso, Bouhmadi-López, Chen, Chew, Dialektopoulos and Ong · Journal of Cosmology and Astroparticle Physics · 2025

   The paper studies how the choice of affine connection in f(Q) gravity changes cosmological dynamics, including whether Big Bang and Big Rip singularities are replaced by smooth de Sitter phases.

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   1. UncheckedThree different connections in f(Q) gravity, all fitting a uniform, isotropic universe, give markedly different cosmological behaviour even with the same f(Q) form.“We analyze three such connections compatible with a homogeneous and isotropic universe to show that they yield markedly different cosmological dynamics, even under the same functional form of $f(Q)$.”
   2. UncheckedIn f(Q) gravity, certain choices of connection can replace the Big Bang and Big Rip singularities with smooth de Sitter phases, the paper shows.“Using both analytical and numerical methods, including a Born-Infeld type model of $f(Q)$, we demonstrate that specific connections can resolve cosmological singularities like the Big Bang and Big Rip, replacing them with smooth de Sitter phases.”