Resurgence: a bridge between perturbative and non perturbative physics (2/2)

by Dr Daniele Dorigoni (DAMTP, University of Cambridge)

Tuesday 16 Dec 2014, 09:30 → 11:30 Europe/Rome

Room 281 (Aula seminari teorica)

Resurgence provides a systematic unification of semiclassical analysis for the perturbative and non-perturbative sectors. Expansions about different saddle points are quantitatively related to one another in a precise manner. I will illustrate the general framework by discussing various examples, from the double-well potential in QM, to asymptotically free QFTs such as the principal chiral model, where this resurgent approach yields a new semiclassical interpretation of IR renormalons.