New interpretation of the Minkowski limit of $R^2$ gravity

Valerio Faraoni, Luca Gallerani, Alain Maltais-Gosselin +2

It is well-established that the Minkowski limit of pure $f(R)=R^2$ gravity breaks down, unlike that of full Starobinsky theory $f(R)=R+\alpha R^2$. We provide a novel interpretation of t…