Bigravity and Horndeski gravity connected by a disformal coupling

Abstract

In this paper, we have studied bi-gravity theory in a very specific limit where we focused only on one degree of freedom generated by the massive graviton. We have analyzed the model in the context of cosmology and demonstrated that the model can give rise to late time cosmic acceleration as an attractor of the dynamical system. However, the observational constraints due to tensor perturbations are stringent giving rise to large fine tuning.

arXiv comment10 pages, 5 figures, Analysis extended to capture generalization, Revised version to appear in PRD

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Cited by in corpus (5)

• Finite-time Cosmological Singularities and the Possible Fate of the Universe
• Disformal couplings in a $\Lambda$CDM background cosmology
• Potential-driven Inflation with Disformal Coupling to Gravity
• Constraining disformal couplings with Redshift Space Distortion
• The description of gravitational waves in geometric scalar gravity