222 citations · 486 across the 17 of their papers we have counts for
5 papers · 1 filter
The relation between Geometry and Matter in classical and quantum Gravity and Cosmology
Daniele Regoli
The present thesis is divided into two main research areas: Classical Cosmology and (Loop) Quantum Gravity. The first part concerns cosmological models with one phantom and one sca…
Face amplitude of spinfoam quantum gravity
Eugenio Bianchi, Daniele Regoli, Carlo Rovelli
The structure of the boundary Hilbert-space and the condition that amplitudes behave appropriately under compositions determine the face amplitude of a spinfoam theory. In quantum…
Phantom without phantom or how the PT symmetry saves us from the Big Rip
A. A. Andrianov, F. Cannata, A. Y. Kamenshchik +1
We consider the PT symmetric flat Friedmann model of two scalar fields with positive kinetic terms. While the potential of one ("normal") field is taken real, that of the other fie…
Scalar field cosmological models with finite scale factor singularities
Francesco Cannata, Alexander Yu. Kamenshchik, Daniele Regoli
We construct a scalar field based cosmological model, possessing a cosmological singularity characterized by a finite value of the cosmological radius and an infinite scalar curvat…
Reconstruction of scalar potentials in two-field cosmological models
Alexander A. Andrianov, Francesco Cannata, Alexander Y. Kamenshchik +1
We study the procedure of the reconstruction of phantom-scalar field potentials in two-field cosmological models. It is shown that while in the one-field case the chosen cosmologic…