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Duality Defects in $E_8$

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arxiv 2112.14323 v1 pith:HG6TI2VX submitted 2021-12-28 hep-th cond-mat.str-elmath-phmath.MP

classification hep-thcond-mat.str-elmath-phmath.MP
keywords defectsdualityholomorphicmathbbperspectiveresultsvoasactions
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abstract

We classify all non-invertible Kramers-Wannier duality defects in the $E_8$ lattice Vertex Operator Algebra (i.e. the chiral $(E_8)_1$ WZW model) coming from $\mathbb{Z}_m$ symmetries. We illustrate how these defects are systematically obtainable as $\mathbb{Z}_2$ twists of invariant sub-VOAs, compute defect partition functions for small $m$, and verify our results against other techniques. Throughout, we focus on taking a physical perspective and highlight the important moving pieces involved in the calculations. Kac's theorem for finite automorphisms of Lie algebras and contemporary results on holomorphic VOAs play a role. We also provide a perspective from the point of view of (2+1)d Topological Field Theory and provide a rigorous proof that all corresponding Tambara-Yamagami actions on holomorphic VOAs can be obtained in this manner. We include a list of directions for future studies.

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Cited by 7 Pith papers

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