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SYDK: Symposium Quantum Mechanics and Gravity: Current Status

SYDK 1: Quantum Mechanics and Gravity: Current Status

SYDK 1.4: Hauptvortrag

Donnerstag, 3. April 2025, 12:15–12:45, ZHG008

Taming Quantum Gravity: insights from Asymptotic Safety — •Alessia Platania — NBI, University of Copenhagen

Asymptotically safe gravity is a candidate for a consistent and predictive quantum theory of gravity that is grounded on quantum field theory and the modern Wilsonian understanding of renormalization. Since its inception, significant efforts have been put in corroborating the `asymptotic safety conjecture' the existence of an interacting fixed point of the gravitational renormalization group flow, serving as a consistent ultraviolet completion of gravity, and making the theory non-perturbatively renormalizable. This talk will review the current state-of-the-art of the field, highlighting recent advancements in understanding the theoretical structure of the theory and testing its internal consistency. Emphasis will be placed on the role of matter, the infrared structure of the theory, and its connection to other quantum gravity approaches. Phenomenological implications of asymptotically safe gravity for cosmology and black hole physics will also be discussed. Finally, challenges and open questions will be outlined, thus providing a roadmap for future research.

Keywords: quantum gravity; asymptotic safety; effective field theory; swampland conjectures; positivity bounds