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Computing Modular Data for Pointed Fusion Categories

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arxiv 1808.05060 v3 pith:BF5QSJGP submitted 2018-08-15 math.QA math.CT

classification math.QAmath.CT
keywords datamodularcategoriescocyclescodefusionomegapointed
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abstract

A formula for the modular data of $\mathcal{Z}(Vec^{\omega}G)$ was given by Coste, Gannon and Ruelle in arXiv:hep-th/0001158, but without an explicit proof for arbitrary 3-cocycles. This paper presents a derivation using the representation category of the quasi Hopf algebra $D^{\omega}G$. Further, we have written code to compute this modular data for many pairs of small finite groups and 3-cocycles. This code is optimised using Galois symmetries of the S and T matrices. We have posted a database of modular data for the Drinfeld center of every Morita equivalence class of pointed fusion categories of dimension less than 64.

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  1. SymTFT Approach for Mixed States with Non-Invertible Symmetries

    quant-ph 2025-07 conditional novelty 7.0 of 10

    A SymTFT-based classification of 1+1d mixed-state phases with non-invertible strong and weak symmetries, with explicit lattice-model examples.

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