PIRSA:14040101

On background-independent renormalization in state-sum model

APA

Bahr, B. (2014). On background-independent renormalization in state-sum model. Perimeter Institute. https://pirsa.org/14040101

MLA

Bahr, Benjamin. On background-independent renormalization in state-sum model. Perimeter Institute, Apr. 24, 2014, https://pirsa.org/14040101

BibTex

          @misc{ pirsa_14040101,
            doi = {},
            url = {https://pirsa.org/14040101},
            author = {Bahr, Benjamin},
            keywords = {},
            language = {en},
            title = {On background-independent renormalization in state-sum model},
            publisher = {Perimeter Institute},
            year = {2014},
            month = {apr},
            note = {PIRSA:14040101 see, \url{https://pirsa.org}}
          }
          

Abstract

In this talk we discuss some notion of coarse graining in state-sums, most notably a class of spin foam models in their holonomy representations. We discuss the notion of scale in this context, and how diffeomorphism-invariance ties into the existence of a continuum limit. We close with an example and muse about the interplay between diffeomorphism-invariance and non-renormalizability.