Speaker: Gerald Dunne

Title: Resurgence for QFT

Abstract:

The application to physics of the modern mathematical theory of resurgent asymptotics has revealed a vast world of new relations connecting perturbative and nonperturbative physics. The main motivation is to find new ways to compute using the quantum field theory path integral, by developing new methods to analytically continue between perturbation theory and nonperturbative methods such as semiclassical expansions and lattice gauge theory. This talk will introduce the key ideas underlying resurgence, illustrated with examples from quantum mechanics, matrix models and quantum field theory.