2018/12/31 by Michael Kenna-Allison, A. Emir Gümrükçüoğlu, A. Emir Gumrukcuoglu +2
Mathematics · Physics and Astronomy · #Attractor #Black Holes and Theoretical Physics #Classical mechanics #Context (archaeology) #Cosmology #Cosmology and Gravitation Theories #Dark energy #De Sitter universe #Galaxies: Formation, Evolution, Phenomena #Isotropy #Mathematical analysis #Mathematical physics #Mathematics #Physics #Quantum mechanics #Scalar (mathematics) #Theoretical physics #Universe #astro-ph.CO #gr-qc #hep-th
paper · pdf · doi:10.1103/physrevd.99.104032
published as Phys. Rev. D 99, 104032 (2019) · Accepted for publication in PRD
arxiv created 2019/04/28 · openalex publication_date 2019/05/14 · arxiv updated 2019/05/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We revisit the question of viability of bigravity cosmology as a candidate for dark energy. In the context of the low energy limit model, where matter couples to a single metric, we study linear perturbations around homogeneous and isotropic backgrounds to derive the Poisson's equation for the Newtonian potential. Extending to second order perturbations, we identify the Vainshtein radius below which nonlinear scalar self-interactions conspire to reproduce general relativity on local scales. We combine all of these results to determine the parameter space that allows a late-time de Sitter attractor compatible with observations and a successful Vainshtein mechanism. We find that the requirement of having a successful Vainshtein mechanism is not compatible with the existence of cosmological solutions at early times.