Contatto di riferimento: Barbara Simoni
Partecipanti: Dr. Antonio Racioppi: NICPB, Tallinn, Estonia
Abstract: We study models of chaotic inflation where the inflaton field $\phi$ is coupled non-minimally to gravity via $\xi \phi^n R$, a.k.a. $\xi$-attractors. We focus on the Palatini theory of gravity and we show that in this case Starobinsky inflation is not any more a universal attractor. On the other hand we prove that, once quantum corrections are taken into account, the strong coupling limit of (a certain class of) $\xi$-attractor models will move into linear inflation regardless of the adopted gravity formulation (metric or Palatini).