432 citations · 3.2k across the 70 of their papers we have counts for
73 papers
Inflationary assessment of Einstein-Cartan models
Theodoros Katsoulas, Kyriakos Tamvakis
In the framework of Einstein-Cartan gravity with an action depending both of the Ricci scalar and the so-called Holst-invariant curvature we co…
Toward a gravitational network: Bridging metric-affine gravity and no-scale supergravity
Ioannis D. Gialamas, Theodoros Katsoulas, Kyriakos Tamvakis
We consider a class of models in the framework of metric-affine gravity and establish their correspondence to the bosonic sector of a class of no-scale supergravity models. The exc…
Keeping the relation between the Starobinsky model and no-scale supergravity ACTive
Ioannis D. Gialamas, Theodoros Katsoulas, Kyriakos Tamvakis
We introduce a modification of the Starobinsky model in the form of an additional cubic Ricci scalar curvature term , scaled by a dimensionless parameter , with the r…
Dynamically induced spin-2 mass in a Weyl-invariant framework
Ioannis D. Gialamas, Kyriakos Tamvakis
We combine the ghost-free bimetric theory of gravity with the concept of local Weyl invariance, realized in the framework of Einstein-Cartan gravity. The gravitational sector, char…
General Einstein-Cartan quadratic gravity with derivative couplings
Theodoros Katsoulas, Kyriakos Tamvakis
Within the framework of Einstein-Cartan gravity we consider an action, containing up to quadratic terms of the Ricci scalar and the Holst invariant, coupled non-minimally to a scal…
Cosmic inflation in metric-affine gravity
Ioannis D. Gialamas, Kyriakos Tamvakis
In the context of metric-affine gravity theories, where the metric and connection are independent, we examine actions involving quadratic terms in the Ricci scalar curvature and th…