Polarization and entanglement spectrum in non-hermitian systems
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2021
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| _version_ | 1866915767472095232 |
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| author | Ortega-Taberner, Carlos Rødland, Lukas Hermanns, Maria |
| author_facet | Ortega-Taberner, Carlos Rødland, Lukas Hermanns, Maria |
| contents | The entanglement spectrum is a useful tool to study topological phases of matter, and contains valuable information about the ground state of the system. Here, we study its properties for free non-Hermitian systems for both point-gapped and line-gapped phases. While the entanglement spectrum only retains part of the topological information in the former case, it is very similar to Hermitian systems in the latter. In particular, it not only mimics the topological edge modes, but also contains all the information about the polarization, even in systems that are not topological. Furthermore, we show that the Wilson loop is equivalent to the many-body polarization and that it reproduces the phase diagram for the system with open boundaries, despite being computed for a periodic system. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2111_07788 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Polarization and entanglement spectrum in non-hermitian systems Ortega-Taberner, Carlos Rødland, Lukas Hermanns, Maria Mesoscale and Nanoscale Physics Strongly Correlated Electrons The entanglement spectrum is a useful tool to study topological phases of matter, and contains valuable information about the ground state of the system. Here, we study its properties for free non-Hermitian systems for both point-gapped and line-gapped phases. While the entanglement spectrum only retains part of the topological information in the former case, it is very similar to Hermitian systems in the latter. In particular, it not only mimics the topological edge modes, but also contains all the information about the polarization, even in systems that are not topological. Furthermore, we show that the Wilson loop is equivalent to the many-body polarization and that it reproduces the phase diagram for the system with open boundaries, despite being computed for a periodic system. |
| title | Polarization and entanglement spectrum in non-hermitian systems |
| topic | Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2111.07788 |