Speaker
Sergio Luigi Cacciatori
(Università degli Studi dell'Insubria, Department of Science and High Technology)
Description
After recalling the role of the topology of the de Sitter and anti de Sitter manifold in determining the main properties of Quantum Field Theories on such backgrounds, we will show how space configuration calculations allow to compute loop integrals in such maximally symmetric spacetimes. In particular, we will show how a remarkable Källén-Lehmann formula allows to compute banana integrals up to two loops on an (anti)de Sitter background.
