Ven. 04/12/2015 14:00 Grand Ourse (Bat. 13, Etg. 1)
GEILLER Marc (Penn State University)
Quantum spacetime and topological quantum field theories with defects
After introducing and reviewing some recent developments in discrete non-perturbative approaches to quantum gravity, I will present the construction of new vacua and representations for the quantum algebra of observables of canonical gravity. This will highlight the unsuspected richness of this class of theories, and make more transparent their interpretation as topological quantum field theories with defects. I will then explain the relevance of this construction for the study of the continuum limit via coarse-graining and renormalization.
Pour plus d'informations, merci de contacter Alexandrov S.