370 citations · 2.4k across the 38 of their papers we have counts for
7 papers · 1 filter
The geometry of inflationary observables: lifts, flows, equivalence classes
Georgios K. Karananas, Marco Michel, Javier Rubio
The Eisenhart lift allows to formulate the dynamics of a scalar field in a potential as pure geodesic motion in a curved field-space manifold involving an additional fictitious vec…
Higgs-Dilaton Inflation in Einstein-Cartan gravity
Matteo Piani, Javier Rubio
We study the phenomenology of the Higgs-Dilaton model in the context of Einstein-Cartan gravity, focusing on the separate impact of the Holst and Nieh-Yan terms on the inflationary…
On the impact of non-local gravity on compact stars
Grigoris Panotopoulos, Javier Rubio, Ilídio Lopes
We study the impact of non-local modifications of General Relativity on stellar structure. In particular, assuming an analytic distortion function and specific equations of state,…
Scale symmetry, the Higgs and the Cosmos
Javier Rubio
I review the Higgs-Dilaton model: a scale-invariant extension of the Standard Model and gravity able to support inflation and dark energy with just an additional degree of freedom…
Emergent scale symmetry: Connecting inflation and dark energy
Javier Rubio, Christof Wetterich
Quantum gravity computations suggest the existence of an ultraviolet and an infrared fixed point where quantum scale invariance emerges as an exact symmetry. We discuss a particula…
Instabilities in tensorial nonlocal gravity
Henrik Nersisyan, Yashar Akrami, Luca Amendola +3
We discuss the cosmological implications of nonlocal modifications of general relativity containing tensorial structures. Assuming the presence of standard radiation- and matter-do…
Dynamical analysis of cosmology: Impact of initial conditions and constraints from supernovae
Henrik Nersisyan, Yashar Akrami, Luca Amendola +2
We discuss the cosmological implications of the nonlocal modification to standard gravity. We relax the assumption of special initial conditions in the local formula…