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arXiv · 2606.07432

Defects in skein theory and TQFT

Patrick Kinnear·Ingo Runkel
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Abstract

Given a 3-manifold $M$ with a network of line and point defects in its boundary, we define the skein module of this configuration, generalizing the well-studied case of 3-manifolds which only admit point defects in the boundary. We prove that when all defects are labelled by semisimple data, our skein module is isomorphic to the state space of $\partial M$ in the defect version of the Reshetikhin-Turaev TQFT constructed by Carqueville-Runkel-Schaumann. Our defect skein modules follow naturally by globalizing the graphical calculus of module categories and functors thereof, and generalize the possible defect data considered in the defect TQFT beyond the semisimple case.

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Patrick Kinnear, Ingo Runkel. 2026-06-05. Defects in skein theory and TQFT. https://arxiv.org/abs/2606.07432

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