Cosmology in warped massive gravity
Phys. Rev. D 113, 043545 – Published 24 February, 2026
DOI: https://doi.org/10.1103/hqyh-fhc9
Abstract
We study the cosmological dynamics and predictions in the theory of warped massive gravity. This setup postulates a five-dimensional ghost-free massive graviton with a brane-localized four-dimensional massive gravity potential, and has the virtue of raising the strong-coupling scale of the 4D theory. We identify two classes of models that lead to decoupled equations for the scale factor on the brane; one characterized by a particular choice of boundary conditions for the Stückelberg fields and one characterized by a special tuning between the coefficients of the 5D and 4D potentials. In the first case, we find interesting solutions including a cosmological bounce without the need of exotic matter. The second case leads to a modified Friedmann equation, and comparison with data shows the potential of the model to alleviate the Hubble tension.
