Challenges for a UV completion of gravity
Dr. Astrid Eichhorn (Perimeter Institute, CA)

I will discuss challenges for a UV completion of gravity in the continuum path-integral framework.
First, I will use axion electrodynamics as an example to point out that besides fixed points and limit cycles, another type of UV completion might exist for QFTs. I will then focus on the asymptotic-safety scenario in gravity and discuss the properties of the Faddeev-Popov ghost sector in the non-perturbative regime. I will then address coupling matter degrees of freedom into quantum gravity, using the example of a scalar field. Finally, I will discuss the main challenge of any physical theory, namely its testability in experiments and point out how quantum gravity can be tested at accelerators beyond the LHC.