Speaker
Dr
Fabio Briscese
(SUSTech)
Description
It has been realized that nonlocality might be a key ingredient for the formulation of a quantum renormalizable theory of gravitation. In facts, nonlocal gravitational models are earning growing interest in the scientific community, since they are super-renormalizable or even finite at quantum level. In this seminar I will introduce nonlocal field theories and discuss their general features. In particular, I will discuss power counting renormalization and finiteness. Moreover, I will show how Cutkosky rules are generalized to the case of nonlocal theories, so that the perturbative unitarity is easily established. Finally, I will discuss the problem of causality in nonlocal theories.
Primary authors
Dr
Fabio Briscese
(SUSTech)
Prof.
Leonardo Modesto
(SUSTech)
