Multi-field Mimetic Gravity

Understand

In this paper, we extend the mimetic gravity to the multi-field setup with a curved field space manifold.

• The multi-field mimetic scenario is realized via the singular limit of the conformal transformation between the auxiliary and the physical metrics.
• We look for the cosmological implications of the setup where it is shown that at the background level the mimetic energy density mimics the roles of dark matter.
• At the perturbation level, the scalar field perturbations are decomposed into the tangential and normal components with respect to the background field space trajectory.