Modified gravity: a unified approach to metric-affine models

Understand

The starting point of this work is the original Einstein action, sometimes called the Gamma squared action.

• Continuing from our previous results, we study various modified theories of gravity following the Palatini approach.
• The metric and the connection will be treated as independent variables leading to generalised theories which may contain torsion or non-metricity or both.
• Due to our particular approach involving the Einstein action, our setup allows us to formulate a substantial number of new theories not previously studied.