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On background-independent renormalization in state-sum model



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Recording Details

Speaker(s): 
PIRSA Number: 
14040101

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.