Non-linear Cosmological Perturbations for Coupled Dark Energy

Abstract

We derive the one-loop perturbation kernels for a minimal modified gravity model in which dark energy is coupled to dark matter via a constant coupling. We derive the time-dependent kernels via analytical and numerical solutions and provide accurate fitting functions. These kernels can be directly employed to test for modified gravity in forthcoming large-scale surveys.

Changed the notation for the initial time from $\hat{I}{\cdot }_0$ to $\hat{I}{\cdot }_i$, to avoid confusion with present time. A typo mistake in the second term of Eq. (3.8) is corrected.Corrected some typos and recalculated some fitting functions, conclusions unchanged

Cited by in corpus (2)

• One-loop power spectrum corrections in interacting dark energy cosmologies
• Crunching, Bouncing, and Cyclical Cosmologies from Dark Sector Interactions