Photonic Implementation of Quantum Gravity Simulator / Papers QISS1 / By Qiss Emanuele Polino, Beatrice Polacchi, Davide Poderini, Iris Agresti, Gonzalo Carvacho, Fabio Sciarrino, Andrea Di Biagio, Carlo Rovelli, Marios Christodoulou CPT Marseille, IQOQI Vienna, QILab Rome Preprint: 2207.01680