62 citations · 62 across the 2 of their papers we have counts for
9 papers
Inflationary phenomenology of quadratic gravity in the Palatini formulation
Angelos Lykkas
The theory of General Relativity was established on a spacetime manifold equipped with a metric tensor, , and the connection on identified…
Extended interactions in the Palatini- inflation
Angelos Lykkas, Kyriakos Tamvakis
The Palatini formulation of the Starobinsky model does not yield a propagating scalaron that can assume the role of the inflaton field as in the conventional metric formulation. In…
Palatini-Higgs inflation with non-minimal derivative coupling
Ioannis D. Gialamas, Alexandros Karam, Angelos Lykkas +1
The predictions of standard Higgs inflation in the framework of the metric formalism yield a tensor-to-scalar ratio which lies well within the expected accuracy of…
Equivalence of inflationary models between the metric and Palatini formulation of scalar-tensor theories
Laur Järv, Alexandros Karam, Aleksander Kozak +3
With a scalar field non-minimally coupled to curvature, the underlying geometry and variational principle of gravity - metric or Palatini - becomes important and makes a difference…
Constant-roll in the Palatini- models
Ignatios Antoniadis, Angelos Lykkas, Kyriakos Tamvakis
We consider models of a scalar field coupled to quadratic gravity in the framework of the Palatini formulation. The resulting Einstein-frame generalized -inflation e…
Single-field inflation in models with an term
Ignatios Antoniadis, Alexandros Karam, Angelos Lykkas +2
We present two cases where the addition of the term to an inflationary model leads to single-field inflation instead of two-field inflation as is usually the case. In both ca…