Singularity-free cosmological solutions in quadratic gravity

P. Kanti, J. Rizos, K. Tamvakis

We study a general field theory of a scalar field coupled to gravity through a quadratic Gauss-Bonnet term $\xi (\varphi )R_{GB}^2$. The coupling function has the form $\xi (\varphi )={\varphi }^n$, where $n$…