Equivalence of inflationary models between the metric and Palatini formulation of scalar-tensor theories
Equivalence of inflationary models between the metric and Palatini formulation of scalar-tensor theories
With a scalar field nonminimally coupled to curvature, the underlying geometry and variational principle of gravity---metric or Palatini---becomes important and makes a difference, as the field dynamics and observational predictions generally depend on this choice. In the present paper, we describe a classification principle which encompasses both metric and Palatini …