Peter Fischer CERN / TU-Wien

Quantum gravity in extra dimensions (pdf)

Quantum gravity in extra dimensions is studied with renormalisation group methods. A non-trivial ultraviolet fixed point is detected within the Einstein-Hilbert truncation. Its stability properties and universal eigenvalues are deduced for arbitrary gauge fixing parameter. If the fixed point persists within extended truncations, quantum gravity in extra dimensions is asymptotically safe, i.e. non-perturbatively renormalisable. Phenomenological implications of this result are discussed.