The construction of observable algebra in field algebra of $G$-spin models determined by a normal subgroup

Xin Qiaoling, Jiang Lining

Let $G$ be a finite group and $H$ a normal subgroup. Starting from $G$-spin models, in which a non-Abelian field ${\mathcal{F}}_H$ w.r.t. $H$ carries an action of the Hopf $C^{\ast }$-al…