Abstract:
A long-standing problem in QFT and quantum gravity is the construction of an IR-finite" S-matrix. In the gravitational case, the existence of these infrared divergences is intimately tied to the memory effect (i.e. the permanent displacement of test masses due to the passage of a gravitational wave). In this talk, I shall explain the origin of these connections and illustrate that the construction of an IR-finite S-matrix requires the inclusion of states with memory (which do not lie in the standard Fock space).
Infrared Finite Scattering Theory in QFT and Quantum Gravity
16.05.2023 14:00 - 15:30
Organiser:
D. Grumiller, S. Fredenhagen, E. Batista, R. Ruzziconi