Is quantum Einstein gravity non-perturbatively renormalizable?

by Martin REUTER (Mainz University)

Thursday 21 Mar 2002, 14:00 → 15:00 Europe/Zurich

TH Auditorium (CERN)

Recent evidence is presented supporting the conjecture that four-dimensional Quantum Einstein Gravity is 'asymptotically safe' in Weinberg's sense. This would mean that the theory is likely to be non-perturbatively renormalizable and could be considered a fundamental, microscopic quantum theory of gravity which is mathematically consistent and predictive down to arbitrarily small length scales. For a truncated version of the exact flow equation of the effective average action we establish the existence of a non-Gaussian renormalization group fixed point which is suitable for the construction of a non-perturbative infinite cut-off limit.