Master thesis defense by Jonas Pfeiffer

Speaker: Jonas Pfeiffer

Spacetime coordinates: Wed @ 9:00, Hb1

Zoom Link: https://ucph-ku.zoom.us/j/9295289933?omn=67282578176

Title: Black Hole Mimickers in Asymptotically Safe Einstein-Weyl Gravity

Abstract: This thesis explores the interface between quantum gravity and black hole physics within the framework of asymptotic safety. A quantum field theory is ultraviolet complete and renormalizable if its renormalization group flow is attracted to an ultraviolet fixed point at high energies. The asymptotic safety scenario for quantum gravity is based on the existence of such an ultraviolet completion, making gravity non-perturbatively renormalizable with respect to an interacting fixed point. Using functional renormalization group techniques applied to a truncated gravitational action (the Einstein-Weyl truncation), we determine the unique ultraviolet-complete trajectory connecting this fixed point to the infrared, thereby fixing the Wilson coefficient of the Weyl-squared term to G_C^2= 0.5092 M_p^2. Inputting this quantum-gravity-determined value in the classically derived phase diagram of Einstein-Weyl solution families, we can identify which black hole-like solutions are allowed within the bounds set by asymptotic safety.