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arXiv 2604.09503hep-thcond-mat.str-elmath-phmath.MP
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二维费米系统基于Z₂味对称性的分类

Classification of 2D Fermionic Systems with a $\mathbb Z_2$ Flavor Symmetry

Yau Mathematical Sciences Center (YMSC), Tsinghua University(清华大学丘成桐数学科学中心);Beijing Institute of Mathematical Sciences and Applications (BIMSA)(北京国际数学研究中心);Department of Physics, Xiamen University(厦门大学物理系);Peng Huanwu Center for Fundamental Theory(彭桓武理论物理中心)

Chi-Ming Chang, Jin Chen, Fengjun Xu

AI总结:

本文基于超融合范畴分类二维费米系统,考虑普遍费米宇称对称性及额外Z₂味对称性,通过融合规则得到三种分类,共16种一致超融合范畴。

摘要:

我们分类描述二维费米系统的超融合范畴,该系统配备普遍费米宇称对称性,由拓扑缺陷线(TDL)Z实现,以及额外由TDL W生成的Z₂味对称性。根据W是m型还是q型,其融合规则导致三种不同分类,解超五边形方程得到16种一致的超融合范畴。这些由不变量(ν_W,ν_Z,ν_{WZ})标记,确定由W、Z和WZ生成的Z₈反常类。我们还通过多个Majorana费米子提供显式实现,并讨论对费米CFTs和有间隙相的影响。

英文摘要:

We classify superfusion categories describing two-dimensional fermionic systems equipped with the universal fermion-parity symmetry, implemented by a topological defect line (TDL) $Z$, and an additional $\mathbb{Z}_2$ flavor symmetry generated by a $W$ TDL. Depending on whether $W$ is m-type or q-type, its fusion rules lead to three distinct classes, and solving the super-pentagon equations yields 16 consistent superfusion categories. These are labeled by invariants $(ν_W,ν_Z,ν_{WZ})$, which determine the $\mathbb{Z}_8$ anomaly classes of the symmetries generated by $W$, $Z$, and $WZ$. We also provide explicit realizations using multiple Majorana fermions and comment on implications for fermionic CFTs and gapped phases.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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