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arXiv · 0704.0195

Group-theoretical properties of nilpotent modular categories

Vladimir Drinfeld·Shlomo Gelaki·Dmitri Nikshych·Victor Ostrik
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Abstract

We characterize a natural class of modular categories of prime power Frobenius-Perron dimension as representation categories of twisted doubles of finite p-groups. We also show that a nilpotent braided fusion category C admits an analogue of the Sylow decomposition. If the simple objects of C have integral Frobenius-Perron dimensions then C is group-theoretical. As a consequence, we obtain that semisimple quasi-Hopf algebras of prime power dimension are group-theoretical. Our arguments are based on a reconstruction of twisted group doubles from Lagrangian subcategories of modular categories (this is reminiscent to the characterization of doubles of quasi-Lie bialgebras in terms of Manin pairs).

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BibTeXRIS

Vladimir Drinfeld, Shlomo Gelaki, Dmitri Nikshych, Victor Ostrik. 2007-04-02. Group-theoretical properties of nilpotent modular categories. https://arxiv.org/abs/0704.0195

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