Title: Scalar field phenomenology in Disformally coupled Quintessence
Abstract:
The Quintessence model is a simple alternative to GR, where a cosmological scalar field is responsible for the cosmic acceleration when rolling down a potential. Here, I consider an extension of this model by coupling the scalar field to matter through a disformal interaction. This introduces perturbations to the field evolution, as well as fifth forces acting on the matter distribution. I present the model of Disformally coupled Quintessence, and discuss newly discovered phenomena in the evolution of the scalar field in this model. I will show results from recent N-body simulations, including the field evolution on non-linear scales, and the possibility for repulsive fifth forces.
https://arxiv.org/abs/1902.02125