Fermionic Finite-Group Gauge Theories and Interacting Symmetric/Crystalline Orders via Cobordisms

Meng Guo Harvard Kantaro Ohmori IAS Princeton Pavel Putrov ICTS Zheyan Wang USTC Juven Wang IAS Princeton

Mathematical Physics mathscidoc:1904.22012

2018
We formulate a family of spin Topological Quantum Filed Theories (spin-TQFTs) as fermionic generalization of bosonic Dijkgraaf-Witten TQFTs. They are obtained by gauging $G$-equivariant invertible spin-TQFTs, or, in physics language, gauging the interacting fermionic Symmetry Protected Topological states (SPTs) with a finite group $G$ symmetry. We use the fact that the latter are classified by Pontryagin duals to spin-bordism groups of the classifying space $BG$. We also consider unoriented analogs, that is $G$-equivariant invertible pin$^\pm$-TQFTs (fermionic time-reversal-SPTs) and their gauging. We compute these groups for various examples of abelian $G$ using Adams spectral sequence and describe all corresponding TQFTs via certain bordism invariants in dimensions 3, 4, and other. This gives explicit formulas for the partition functions of spin-TQFTs on closed manifolds with possible extended operators inserted. The results also provide explicit classification of 't Hooft anomalies of fermionic QFTs with finite abelian group symmetries in one dimension lower. We construct new anomalous boundary deconfined spin-TQFTs (surface fermionic topological orders). We explore SPT and SET (symmetry enriched topologically ordered) states, and crystalline SPTs protected by space-group (e.g.\ translation $\mathbb{Z}$) or point-group (e.g.\ reflection, inversion or rotation $C_m$) symmetries, via the layer-stacking construction.
High Energy Physics - Theory (hep-th); Strongly Correlated Electrons (cond-mat.str-el); Mathematical Physics (math-ph); Algebraic Topology (math.AT); Geometric Topology (math.GT)
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  • 1812.11959
@inproceedings{meng2018fermionic,
  title={Fermionic Finite-Group Gauge Theories and Interacting Symmetric/Crystalline Orders via Cobordisms},
  author={Meng Guo, Kantaro Ohmori, Pavel Putrov, Zheyan Wang, and Juven Wang},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20190428054032167086284},
  year={2018},
}
Meng Guo, Kantaro Ohmori, Pavel Putrov, Zheyan Wang, and Juven Wang. Fermionic Finite-Group Gauge Theories and Interacting Symmetric/Crystalline Orders via Cobordisms. 2018. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20190428054032167086284.
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