Year: 2020
Type: article
Abstract: We demonstrate that the early Universe in bimetric theory is screened by the Vainshtein mechanism on a Friedmann-Lema\^{\i}tre-Robertson-Walker background. The spin-2 mass serves as the cosmological Vainshtein scale in this case. This allows us to quantitatively address early Universe cosmology. In particular, in a global analysis, we study data from the cosmic microwave background radiation and local measurements of the Hubble flow. We show that bimetric cosmology resolves the discrepancy in the local and early-time measurements of the Hubble scale via an effective phantom dark energy component.
Authors: Marvin Lüben, Angnis Schmidt-May, Juri Smirnov
Institutions: Max Planck Institute for Physics, The Ohio State University
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W2996545957