389 citations · 2.8k across the 228 of their papers we have counts for
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The role of longitudinal polarizations in Horndeski and macroscopic gravity: Introducing gravitational plasmas
Fabio Moretti, Flavio Bombacigno, Giovanni Montani
We discuss some general and relevant features of longitudinal gravitational modes in Horndeski gravity and their interaction with matter media. Adopting a gauge-invariant formulati…
Quantum gravity corrections to the matter dynamics in the presence of a reference fluid
Giulia Maniccia, Giovanni Montani
We analyze the effect induced on standard quantum field theory (in functional approach) by quantum gravity corrections to a pure classical background. In the framework of the Kucha…
Comparison of the Semiclassical and Quantum Dynamics of the Bianchi I Cosmology in the Polymer and GUP Extended Paradigms
Gabriele Barca, Eleonora Giovannetti, Giovanni Montani
We compare in some detail Polymer Quantum Mechanics and the Generalized Uncertainty Principle approach to clarify to what extent we can treat them on the same footing. We show that…
Big-Bounce in projectively invariant Nieh-Yan models: the Bianchi I case
Flavio Bombacigno, Simon Boudet, Gonzalo J. Olmo +1
We show that the Nieh-Yan topological invariant breaks projective symmetry and loses its topological character in presence of non vanishing nonmetricity. The notion of the Nieh-Yan…
On the evolution of inhomogeneous perturbations in the CDM model and modified gravity theories
Tiziano Schiavone, Giovanni Montani
We focus on weak inhomogeneous models of the Universe at low redshifts, described by the Lemaître-Tolman-Bondi (LTB) metric. The principal aim of this work is to compare the evolut…
Polymer Quantization of the Isotropic Universe: comparison with the Bounce of Loop Quantum Cosmology
Gabriele Barca, Eleonora Giovannetti, Federico Mandini +1
We implement Polymer Quantum Mechanics on the Hamiltonian formulation of the isotropic Universe in both the representations of the standard Ashtekar-Barbero-Immirzi connection and…