English

Fusion Trees and Homological Representations

Geometric Topology 2025-11-03 v1 Quantum Algebra

Abstract

We establish an identification between the spaces of α\alpha-fusion trees in non-semisimple topological quantum computation (NSS TQC) and a family of homological representations of the braid group known as the Lawrence representations specialized at roots of unity. Leveraging this connection, we provide a new proof of Ito's colored Alexander invariant formula using graphical calculus. Inspired by Anghel's topological model, we derive a formula involving the Hermitian pairing of fusion trees. This formula verifies that non-semisimple quantum knot invariants can be explicitly encoded via the language of fusion trees in the NSS TQC mathematical architecture.

Keywords

Cite

@article{arxiv.2510.27218,
  title  = {Fusion Trees and Homological Representations},
  author = {Sung Kim},
  journal= {arXiv preprint arXiv:2510.27218},
  year   = {2025}
}

Comments

31 pages, Tikz figures

R2 v1 2026-07-01T07:15:10.931Z