106 citations · 168 across the 7 of their papers we have counts for
15 papers · 1 filter
Post-Newtonian Constraints on Scalar-Tensor Gravity
Alexandros Karam, Samuel Sánchez López, José Jaime Terente Díaz
Solar-System constraints on a general scalar-tensor theory with generic non-minimal coupling function, non-canonical kinetic function, and scalar potential, are investigated in bot…
Observable Gravitational Waves from Hyperkination in Palatini Gravity and Beyond
Samuel Sánchez López, Konstantinos Dimopoulos, Alexandros Karam +1
We consider cosmology with an inflaton scalar field with an additional quartic kinetic term. Such a theory can be motivated by Palatini modified gravity. Assuming a runaway…
Implications of Palatini gravity for inflation and beyond
Ioannis D. Gialamas, Alexandros Karam, Thomas D. Pappas +1
We present an introduction to cosmic inflation in the framework of Palatini gravity, which provides an intriguing alternative to the conventional metric formulation of gravity. In…
Modelling Quintessential Inflation in Palatini Modified Gravity
Konstantinos Dimopoulos, Alexandros Karam, Samuel Sánchez López +1
We study a model of quintessential inflation constructed in modified gravity with a non-minimally coupled scalar field, in the Palatini formalism. Our non-minimal inflaton fi…
-function reconstruction of Palatini inflationary attractors
Alexandros Karam, Sotirios Karamitsos, Margus Saal
Attractor inflation is a particularly robust framework for developing inflationary models that are insensitive to the details of the potential. Such models are most often considere…
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…