1-5 July 2019
The University of Manchester
Europe/London timezone
- pascos2019@manchester.ac.uk
- +44 (0)161 275 4171
The Local Organising Committee
Perturbatively renormalizable quantum gravity
Presented by Prof. Tim MORRIS
on
4 Jul 2019
from
14:30
to
14:50
Track: String Theory and Alternatives
Content
The Wilsonian renormalization group (RG) requires Euclidean signature. The conformal factor of the metric then has a wrong-sign kinetic term, which has a profound effect on its RG properties. In particular around the Gaussian fixed point, it supports a Hilbert space of renormalizable interactions involving arbitrarily high powers of the gravitational fluctuations. These interactions are characterised by being exponentially suppressed for large field amplitude, perturbative in Newton's constant but non-perturbative in Planck's constant. By taking a limit to the boundary of the Hilbert space, diffeomorphism invariance is recovered in the continuum quantum field theory. Thus the so-called conformal factor instability is the key that allows the construction of a genuine continuum limit for quantum gravity.
Place
Location: Schuster
Room: Annex: Bell Burnell Lecture Theatre