Important features of physical systems; non-perturbative phenomena, cannot be captured by the most wildly used tool in physics: perturbation theory. Perturbation theory is indeed inherently not complete answer. In QCD for example, the growing number of diagrams implies that perturbation theory does not give a finite result to physical quantities or cannot explain the appearance of a mass scale.
Quiet surprisingly there is growing evidence that non-perturbative effect are actually captured by perturbation theory. This talk will introduce the audience to how non-perturbative effect can ‘resurge’ from perturbative data. This technique of resurgence can be used to investigate the non-perturbative sector of exactly solvable models in two dimensional Quantum Field Theory.