Observable Primordial Gravitational Waves from Non-minimally Coupled $R^2$ Palatini Modified Gravity

Hardik Jitendra Kuralkar, Sukanta Panda, Archit Vidyarthi

We probe the spectrum of primordial gravitational waves (GWs) produced during the eras of hyperkination, kination, and reheating in a non-minimally coupled, $\mathcal{L} \propto (1…