Representations of fusion categories and their commutants
Representations of fusion categories and their commutants
复制标题
融合类别及其交换子的表示
DOI:
10.1007/s00029-023-00841-2
复制
发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Penneys, David
中科院分区:
文献类型:
--
作者:
Henriques, André;Penneys, David
A bicommutant category is a higher categorical analog of a von Neumann algebra. We study the bicommutant categories which arise as the commutantof a fully faithful representationof a unitary fusion category. Using results of Izumi, Popa, and Tomatsu about existence and uniqueness of representations of unitary (multi)fusion categories, we prove that ifandare Morita equivalent unitary fusion categories, then their commutant categoriesandare equivalent as bicommutant categories. In particular, they are equivalent as tensor categories: \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\begin{aligned} \Big (\,\,{\mathcal {C}}\,\,\simeq _{\textrm{Morita}}\,\,{\mathcal {D}}\,\,\Big ) \qquad \Longrightarrow \qquad \Big (\,\,{\mathcal {C}}' \,\,\simeq _{\textrm{tensor}}\,\,{\mathcal {D}}'\,\,\Big ). \end{aligned}$$\end{document}This categorifies the well-known result according to which the commutants (in some representations) of Morita equivalent finite dimensional-algebras are isomorphic von Neumann algebras, provided the representations are ‘big enough’. We also introduce a notion of positivity for bi-involutive tensor categories. For dagger categories, positivity is a property (the property of being a-category). But for bi-involutive tensor categories, positivity is extra structure. We show that unitary fusion categories andadmit distinguished positive structures, and that fully faithful representationsautomatically respect these positive structures. This is the published version of arXiv:2004.08271.
登录
查看更多内容
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
J. Egger
通讯作者:
J. Egger
影响因子:
1.7
作者:
H. Kosaki;R. Longo
通讯作者:
R. Longo
影响因子:
1.9
作者:
Henriques, André;Penneys, David;Tener, James
通讯作者:
Tener, James
影响因子:
3.1
作者:
S. Popa
通讯作者:
S. Popa
DOI:
10.1016/j.aim.2012.12.020
发表时间:
2011
期刊:
arXiv: Operator Algebras
影响因子:
--
作者:
S'ebastien Falguieres;Sven Raum
通讯作者:
Sven Raum