Topological quantum field theories from Hecke algebras

Fock, Vladimir; Tatitscheff, Valdo; Thomas, Alexander

doi:10.1090/ert/640

Topological quantum field theories from Hecke algebras
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by Vladimir Fock, Valdo Tatitscheff and Alexander Thomas;

Represent. Theory 27 (2023), 248-291

DOI: https://doi.org/10.1090/ert/640

Published electronically: May 22, 2023

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Abstract:

We construct one-dimensional non-commutative topological quantum field theories (TQFTs), one for each Hecke algebra corresponding to a finite Coxeter system. These TQFTs associate an invariant to each ciliated surface, which is a Laurent polynomial for punctured surfaces. There is a graphical way to compute the invariant using minimal colored graphs. We give explicit formulas in terms of the Schur elements of the Hecke algebra and prove positivity properties for the invariants when the Coxeter group is of classical type, or one of the exceptional types $H_3$, $E_6$ and $E_7$.

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Representation Theory

Topological quantum field theories from Hecke algebras
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