190 citations · 1.4k across the 62 of their papers we have counts for
11 papers · 1 filter
Geometric phases and cyclic isotropic cosmologies
Leonardo Banchi, Francesco Caravelli
In the present paper we study the evolution of the modes of a scalar field in a cyclic cosmology. In order to keep the discussion clear, we study the features of a scalar field in…
GEMs and amplitude bounds in the colored Boulatov model
Francesco Caravelli
In this paper we construct a methodology for separating the divergencies due to different topological manifolds dual to Feynman graphs in colored group field theory. After having i…
Quenches and lattice simulators for particle creation
Francesco Caravelli, Fotini Markopoulou, Arnau Riera +1
In this paper we propose a framework for simulating thermal particle production in condensed matter systems. The procedure we describe can be realized by means of a quantum quench…
Disordered locality and Lorentz dispersion relations: an explicit model of quantum foam
Francesco Caravelli, Fotini Markopoulou
Using the framework of Quantum Graphity, we construct an explicit model of a quantum foam, a quantum spacetime with spatial non-local links. The states depend on two parameters: th…
Curved geometry and Graphs
Francesco Caravelli
Quantum Graphity is an approach to quantum gravity based on a background independent formulation of condensed matter systems on graphs. We summarize recent results obtained on the…
Direct imaging rapidly-rotating non-Kerr black holes
Cosimo Bambi, Francesco Caravelli, Leonardo Modesto
Recently, two of us have argued that non-Kerr black holes in gravity theories different from General Relativity may have a topologically non-trivial event horizon. More precisely,…
Properties of Quantum Graphity at Low Temperature
Francesco Caravelli, Fotini Markopoulou
We present a mapping of dynamical graphs and, in particular, the graphs used in the Quantum Graphity models for emergent geometry, into an Ising hamiltonian on the line graph of a…
Spinning Loop Black Holes
Francesco Caravelli, Leonardo Modesto
In this paper we construct four Kerr-like spacetimes starting from the loop black hole Schwarzschild solutions (LBH) and applying the Newman-Janis transformation. In previous paper…
Holographic actions from black hole entropy
Francesco Caravelli, Leonardo Modesto
Using the Wald's relation between the Noether charge of diffeomorphisms and the entropy for a generic spacetime possessing a bifurcation surface, we introduce a method to obtain a…
A quantum Bose-Hubbard model with evolving graph as toy model for emergent spacetime
Alioscia Hamma, Fotini Markopoulou, Seth Lloyd +3
We present a toy model for interacting matter and geometry that explores quantum dynamics in a spin system as a precursor to a quantum theory of gravity. The model has no a priori…
Fractal Dimension in 3d Spin-Foams
Francesco Caravelli, Leonardo Modesto
In this paper we perform the calculation of the spectral dimension of the space-time in 3d quantum gravity using the dynamics of the Ponzano-Regge vertex (PR) and its quantum group…