Quantum Spacetimes and Gravity in IKKT matrix model

03.06.2025 14:00 - 15:30

Alessandro Manta (University of Vienna)

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. In particular we can estimate the Newton constant from the geometry of the extra dimensions.
Furthermore, for a specific class of solutions of classical IKKT (and mass deformations), Covariant Cosmological Quantum Spacetimes, we study different mechanisms for dynamical stabilization of the extra dimensions.

Organiser:
S. Fredenhagen, M. Sperling
Location:

Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanng. 5, 5. St., 1090 Wien

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