Speaker
Nicola Andrea Dondi
(University of Bern)
Description
The conformal data of generic CFTs involving heavy charged operators can be organised as a series in inverse powers of the global charges involved. When extrapolating these expansions to light low-charge sectors, is it relevant to ask whether these series are divergent and Borel-summable. In this talk, I will show that the O(N) scalar CFT has a large-charge expansion which is not Borel-summable with non-perturbative ambiguities cured by Worldline instantons. These are discussed using Resurgence methods and shown to have an exact semi-classical expansion.
Author
Nicola Andrea Dondi
(University of Bern)
Co-authors
Domenico Orlando
Susanne Reffert
(Universitaet Bern (CH))
Mr
Ioannis Kalogerakis
(University of Bern)
