Speaker
Daniele Dorigoni
(DAMPT Cambridge)
Description
Also in theories without instantons non-perturbative saddle points play a crucial role. Using the example of the 2d principal chiral model we show how resurgence theory, which unifies perturbative and non-perturbative physics, predicts the existence of several types of non-perturbative saddles: the fractons. With these new saddles is possible to understand the quantum interpretation of unstable classical solutions called unitons. We explain also how these fractons lead to a semi-classical realization of IR renormalon and yield the generation of the mass gap. We will conclude with some remarks on integrability and localization.
Author
Daniele Dorigoni
(DAMPT Cambridge)
