Extended Models
===============

See ``modified_gravity_models.ipynb`` for a quick tutorial on how to use MGL with extended models.


We provide a set of extended models in MGL, which can be used to compute the power spectrum and other quantities for modified gravity theories. The models include:

- **DGP**: Dvali-Gabadadze-Porrati model, a brane-world scenario with a self-accelerating solution.
- **Hu-Sawicki f(R)**: A class of models where the gravitational action is modified by a function of the Ricci scalar, leading to a fifth force.
- **mu-Sigma**: A phenomenological model (with the screening scale q1) that captures the effects of modified gravity on the growth of structure via mu and on the lensing potential vias Sigma. Both variables are parameterised as functions of the dark energy evolution. 
- **gamma**: Time-dependent growth index parametrisation with the phenomenological screening scale.
- **DS** or **IDE**: Interacting dark energy model, in which dark energy and matter interact through momentum exchange.