Boundary-bulk relation in topological orders

@article{Kong2017BoundarybulkRI,
  title={Boundary-bulk relation in topological orders},
  author={Liang Kong and X. Wen and Hao Zheng},
  journal={Nuclear Physics},
  year={2017},
  volume={922},
  pages={62-76}
}
Abstract In this paper, we study the relation between an anomaly-free n + 1 D topological order, which are often called n + 1 D topological order in physics literature, and its n D gapped boundary phases. We argue that the n + 1 D bulk anomaly-free topological order for a given n D gapped boundary phase is unique. This uniqueness defines the notion of the “ bulk ” for a given gapped boundary phase. In this paper, we show that the n + 1 D “ bulk ” phase is given by the “center” of the n D… Expand

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