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A remark about the anomalies of cyclic holomorphic permutation orbifolds
International Journal of Mathematics ( IF 0.6 ) Pub Date : 2020-06-30 , DOI: 10.1142/s0129167x20500809
M. Bischoff 1
Affiliation  

Using a result of Longo and Xu, we show that the anomaly arising from a cyclic permutation orbifold of order 3 of a holomorphic conformal net [Formula: see text] with central charge [Formula: see text] depends on the “gravitational anomaly” [Formula: see text]. In particular, the conjecture that holomorphic permutation orbifolds are non-anomalous and therefore a stronger conjecture of Müger about braided crossed [Formula: see text]-categories arising from permutation orbifolds of completely rational conformal nets are wrong. More generally, we show that cyclic permutations of order [Formula: see text] are non-anomalous if and only if [Formula: see text] or [Formula: see text]. We also show that all cyclic permutation gaugings of [Formula: see text] arise from conformal nets.

中文翻译:

论循环全纯排列orbifolds的异常

使用 Longo 和 Xu 的结果,我们表明由具有中心电荷 [公式:见文本] 的全纯共形网 [公式:见文本] 的 3 阶循环置换或双折引起的异常取决于“引力异常”[公式:见正文]。特别是,全纯排列orbifolds 是非异常的猜想,因此Müger 关于编织交叉[公式:见正文]-类别的更强猜想是由完全有理共形网的排列orbifolds 产生的,这是错误的。更一般地,我们证明[公式:见文本]的循环排列是非异常的当且仅当[公式:见文本]或[公式:见文本]。我们还表明,[公式:见正文]的所有循环置换测量都来自保形网络。
更新日期:2020-06-30
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