Uploaded December 2025 | Updated September 2026, 2 weeks ago
Speaker: Marc Schiffer (Radboud University)
Abstract: Asymptotically safe quantum gravity might provide a unified description of the fundamental dynamics of quantum gravity and matter. The realization of asymptotic safety—i.e., scale symmetry at high energies—constrains the possible interactions and dynamics of a system. In this talk, I will first motivate the scenario of asymptotic safety for gravity with matter and introduce functional and lattice methods as independent tools to explore it. In this talk, I will focus on lattice methods, in particular on Euclidean dynamical triangulations. Here, I will highlight how non-dynamical scalar fields can be used to probe lattice geometries, and I will present indications that the lattice spacing can be reduced down to the Planck scale, showing that a continuum limit might be reached. I will also present some indications for a scale-dependent cosmological constant, that might serve as a dynamical dark-energy component of our universe.
Speaker: Marc Schiffer (Radboud University)
Abstract: Asymptotically safe quantum gravity might provide a unified description of the fundamental dynamics of quantum gravity and matter. The realization of asymptotic safety—i.e., scale symmetry at high energies—constrains the possible interactions and dynamics of a system. In this talk, I will first motivate the scenario of asymptotic safety for gravity with matter and introduce functional and lattice methods as independent tools to explore it. In this talk, I will focus on lattice methods, in particular on Euclidean dynamical triangulations. Here, I will highlight how non-dynamical scalar fields can be used to probe lattice geometries, and I will present indications that the lattice spacing can be reduced down to the Planck scale, showing that a continuum limit might be reached. I will also present some indications for a scale-dependent cosmological constant, that might serve as a dynamical dark-energy component of our universe.
