Vainshtein Screening in Bimetric Cosmology

Lüben, Marvin; Schmidt-May, Angnis; Smirnov, Juri

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Vainshtein Screening in Bimetric Cosmology

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Lüben, Marvin
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Schmidt-May, Angnis
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Smirnov, Juri
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

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Citation

Lüben, M., Schmidt-May, A., & Smirnov, J. (2020). Vainshtein Screening in Bimetric Cosmology. Physical Review D, 102, 123529. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2019-260.

Cite as: https://hdl.handle.net/21.11116/0000-0008-1C1D-A

Abstract

We demonstrate that the early universe in bimetric theory is screened by the Vainshtein mechanism on an FLRW 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.