Seminar of Department of Theoretical Physics - Alessandro Manta (25.11.2025)

Tuesday 25.11.2025 at 14:00, Lecture room F2/125

19. 11. 2025 09.55 hod.
By: Peter Maták

Alessandro Manta (University of Vienna):
Quantum Spacetimes and Gravity in IKKT matrix model

Abstract:
In this talk I will explain how gravity can be extracted from the IKKT matrix model. IKKT is a non-perturbatively defined model of quantum gravity, which studies quantum dynamics of quantized (fuzzy) spacetimes, represented as matrix configurations. I will explain how the weakly coupled regime of a 4d spacetime with fuzzy extra dimensions contains Einstein-Hilbert gravity at one-loop. Furthermore, for a class solutions of IKKT, Covariant Cosmological Quantum Spacetimes, we study different mechanisms for dynamical stabilization of the extra dimensions.