 Speaker:

Carlo Rovelli

Title: 
GENERAL RELATIVISTIC QUANTUM PHYSICS: Background independent scattering amplitudes, boundary
formalism, local particles and partial observables 
Abstract: 
(i) I present some preliminary results on background independent
calculations of particle
scattering amplitudes. In particular, I discuss the derivation of the
graviton propagator,
from loop quantum gravity and the spinfoam formalism.
(ii) I illustrate the boundary formulation of quantum field theory, its role
in a background
independent context, and how "particles" emerge in this language.
(iii) More in general, I discuss how systematic physical predictions can be
extracted from
a general relativistic quantum field theory: I illustrate the notion of
"partial observable",
and discuss the issue of the physical significance of the spectrum of these
observables,
which controls the interpretation of the area and volume discreteness.

Talk: 
Transparencies, Recorded Talk

 