Photonic topological Anderson insulator in a two-dimensional atomic lattice
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arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2022
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| _version_ | 1866911913787523072 |
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| author | Skipetrov, Sergey E. Wulles, Pierre |
| author_facet | Skipetrov, Sergey E. Wulles, Pierre |
| contents | Disorder in atomic positions can induce a topologically nontrivial phase - topological Anderson insulator (TAI) - for transverse electric optical quasimodes of a two-dimensional honeycomb lattice of immobile atoms. TAI requires both time-reversal and inversion symmetries to be broken to similar extents. It is characterized by a nonzero topological invariant, a reduced density of states and spatially localized quasimodes in the bulk, as well as propagating edge states. A transition from TAI to the topological insulator (TI) phase can take place at a constant value of the topological invariant, showing that TAI and TI represent the same topological phase. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2212_05046 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Photonic topological Anderson insulator in a two-dimensional atomic lattice Skipetrov, Sergey E. Wulles, Pierre Quantum Gases Quantum Physics Disorder in atomic positions can induce a topologically nontrivial phase - topological Anderson insulator (TAI) - for transverse electric optical quasimodes of a two-dimensional honeycomb lattice of immobile atoms. TAI requires both time-reversal and inversion symmetries to be broken to similar extents. It is characterized by a nonzero topological invariant, a reduced density of states and spatially localized quasimodes in the bulk, as well as propagating edge states. A transition from TAI to the topological insulator (TI) phase can take place at a constant value of the topological invariant, showing that TAI and TI represent the same topological phase. |
| title | Photonic topological Anderson insulator in a two-dimensional atomic lattice |
| topic | Quantum Gases Quantum Physics |
| url | https://arxiv.org/abs/2212.05046 |