17080004

Video URL

http://pirsa.org/17080004

From 3D TQFTs to 4D models with defects

Dittrich, B. (2017). From 3D TQFTs to 4D models with defects. Perimeter Institute for Theoretical Physics. http://pirsa.org/17080004

Dittrich, Bianca. From 3D TQFTs to 4D models with defects. Perimeter Institute for Theoretical Physics, Aug. 04, 2017, http://pirsa.org/17080004 

          @misc{ scitalks_17080004,
            doi = {},
            url = {http://pirsa.org/17080004},
            author = {Dittrich, Bianca},
            keywords = {Quantum Foundations, Quantum Information},
            language = {en},
            title = {From 3D TQFTs to 4D models with defects},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2017},
            month = {aug},
            note = {17080004 see, \url{https://scitalks.ca/PIRSA/17080004}}
          }

Bianca Dittrich Perimeter Institute for Theoretical Physics

Source Repository PIRSA
Collection
Talk Type Conference
Subject

Abstract

I will explain a general strategy to lift (2+1)D topological phases, in particular string nets, to (3+1)D models with line defects. This allows a systematic construction of (3+1)D topological theories with defects, including an improved version of the Walker-Wang Model. It has also an interesting application to quantum gravity as it leads to quantum geometry realizations for which all geometric operators have discrete and bounded spectra. I will furthermore comment on some interesting (self-) duality relations that emerge in these constructions.