28 citations · 99 across the 10 of their papers we have counts for
10 papers
Generative Flow Networks in Covariant Loop Quantum Gravity
Joseph Bunao, Pietropaolo Frisoni, Athanasios Kogios +1
Spin foams arose as the covariant (path integral) formulation of quantum gravity depicting transition amplitudes between different quantum geometry states. As such, they provide a…
Primordial fluctuations from quantum gravity: 16-cell topological model
Pietropaolo Frisoni, Francesco Gozzini, Francesca Vidotto
We present a numerical analysis of an Hartle-Hawking state for the early universe, in the deep quantum regime, computed using the covariant Loop Quantum Gravity formalism, in a tru…
Introduction to Loop Quantum Gravity: Rovelli's lectures on LQG
Pietropaolo Frisoni
These notes are a transcript of Carlo Rovelli's lectures on Loop Quantum Gravity, given in Marseille in 2018, which (at present) can be entirely found on YouTube. I transcribed the…
Numerical approach to the black-to-white hole transition
Pietropaolo Frisoni
We outline an algorithm to compute numerically the black-to-white hole transition amplitude, using the loop quantum gravity covariant formulation and the Lorentzian Engle-Pereira-R…
Summing bulk quantum numbers with Monte Carlo in spin foam theories
Pietro Dona, Pietropaolo Frisoni
We introduce a strategy to compute EPRL spin foam amplitudes with many internal faces numerically. We work with sl2cfoam-next, the state-of-the-art framework to numerically evaluat…
Markov Chain Monte Carlo methods for graph refinement in Spinfoam Cosmology
Pietropaolo Frisoni, Francesco Gozzini, Francesca Vidotto
We study the behaviour of the Lorentzian Engle-Pereira-Rovelli-Livine spinfoam amplitude with homogeneous boundary data, under a graph refinement going from five to twenty boundary…
Radiative corrections to the Lorentzian EPRL spin foam propagator
Pietro Donà, Pietropaolo Frisoni, Edward Wilson-Ewing
We numerically estimate the divergence of several two-vertex diagrams that contribute to the radiative corrections for the Lorentzian EPRL spin foam propagator. We compute the ampl…
How-To compute EPRL spin foam amplitudes
Pietro Dona, Pietropaolo Frisoni
Spin foam theory is a concrete framework for quantum gravity where numerical calculations of transition amplitudes are possible. Recently, the field became very active, but the ent…
Studying the EPRL spinfoam self-energy
Pietropaolo Frisoni
I present some recent progresses in the study of the EPRL self-energy amplitude. New numerical methods allow to analyze how the divergence scales, for which previous works provided…
Numerical analysis of the self-energy in covariant Loop Quantum Gravity
Pietropaolo Frisoni, Francesco Gozzini, Francesca Vidotto
We study numerically the first order radiative corrections to the self-energy, in covariant loop quantum gravity. We employ the recently developed 'sl2cfoam-next' spinfoam amplitud…