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arxiv: 1901.06195 · v1 · pith:VMPAXDZTnew · submitted 2019-01-18 · ❄️ cond-mat.str-el · hep-th

Anomaly indicator of rotation symmetry in (3+1)D topological order

classification ❄️ cond-mat.str-el hep-th
keywords topologicalrotationanomalyindicatorphasessymmetrydiscreteexcitations
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We examine (3+1)D topological ordered phases with $C_k$ rotation symmetry. We show that some rotation symmetric (3+1)D topological orders are anomalous, in the sense that they cannot exist in standalone (3+1)D systems, but only exist on the surface of (4+1)D SPT phases. For (3+1)D discrete gauge theories, we propose anomaly indicator that can diagnose the $\mathbb{Z}_k$ valued rotation anomaly. Since (3+1)D topological phases support both point-like and loop-like excitations, the indicator is expressed in terms of the symmetry properties of point and loop-like excitations, and topological data of (3+1)D discrete gauge theories.

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