Quantized representations of knot groups

Jun Murakami, Roland van der Veen

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Abstract

We propose a new non-commutative generalization of the representation variety and the character variety of a knot group. Our strategy is to reformulate the construction of the algebra of functions on the space of representations in terms of Hopf algebra objects in a braided category (braided Hopf algebra). The construction works under the assumption that the algebra is braided commutative. The resulting knot invariant is a module with a coadjoint action. Taking the coinvariants yields a new quantum character variety that may be thought of as an alternative to the skein module. We give concrete examples for a few of the simplest knots and links.

Original languageEnglish
Pages (from-to)659-692
Number of pages34
JournalQuantum Topology
Volume14
Issue number4
DOIs
Publication statusPublished - 2023

Keywords

  • braided groups
  • Hopf algebras
  • Knots
  • links
  • quantum groups
  • representation varieties

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