On gapped boundaries for SPT phases beyond group cohomology
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2019
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| Acceso en línea: | |
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| _version_ | 1866910657400537088 |
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| author | Kobayashi, Ryohei Ohmori, Kantaro Tachikawa, Yuji |
| author_facet | Kobayashi, Ryohei Ohmori, Kantaro Tachikawa, Yuji |
| contents | We discuss a strategy to construct gapped boundaries for a large class of symmetry-protected topological phases (SPT phases) beyond group cohomology. This is done by a generalization of the symmetry extension method previously used for cohomological SPT phases. We find that this method allows us to construct gapped boundaries for time-reversal-invariant bosonic SPT phases and for fermionic Gu-Wen SPT phases for arbitrary finite internal symmetry groups. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_1905_05391 |
| institution | arXiv |
| publishDate | 2019 |
| record_format | arxiv |
| spellingShingle | On gapped boundaries for SPT phases beyond group cohomology Kobayashi, Ryohei Ohmori, Kantaro Tachikawa, Yuji Strongly Correlated Electrons High Energy Physics - Theory We discuss a strategy to construct gapped boundaries for a large class of symmetry-protected topological phases (SPT phases) beyond group cohomology. This is done by a generalization of the symmetry extension method previously used for cohomological SPT phases. We find that this method allows us to construct gapped boundaries for time-reversal-invariant bosonic SPT phases and for fermionic Gu-Wen SPT phases for arbitrary finite internal symmetry groups. |
| title | On gapped boundaries for SPT phases beyond group cohomology |
| topic | Strongly Correlated Electrons High Energy Physics - Theory |
| url | https://arxiv.org/abs/1905.05391 |