Casimir-Polder interaction between an atom and a Chern insulator: topological signature and long-range repulsion
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866916657591484416 |
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| author | Lu, Bing-Sui |
| author_facet | Lu, Bing-Sui |
| contents | We consider the Casimir-Polder interaction between a two-level atomic system and a Chern insulator for both the resonant and nonresonant channels. For a right circularly polarized excited atomic state near a Chern insulator with a negative Chern number $C$, the resonant Casimir-Polder force can be monotonically repulsive over a large range of separations. In the presence of the same Chern insulator, a right circularly polarized metastable atomic state is expected to experience a repulsive nonresonant Casimir-Polder force over a certain range of atom-surface separations in the far-field region. At still greater separations, the nonresonant Casimir-Polder force is expected to become attractive and exhibit a topological signature, being proportional to $(Cα)^2/(1+(Cα)^2)$, where $α$ is the fine-structure constant. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_01934 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Casimir-Polder interaction between an atom and a Chern insulator: topological signature and long-range repulsion Lu, Bing-Sui Quantum Physics Mesoscale and Nanoscale Physics Materials Science Atomic Physics Optics We consider the Casimir-Polder interaction between a two-level atomic system and a Chern insulator for both the resonant and nonresonant channels. For a right circularly polarized excited atomic state near a Chern insulator with a negative Chern number $C$, the resonant Casimir-Polder force can be monotonically repulsive over a large range of separations. In the presence of the same Chern insulator, a right circularly polarized metastable atomic state is expected to experience a repulsive nonresonant Casimir-Polder force over a certain range of atom-surface separations in the far-field region. At still greater separations, the nonresonant Casimir-Polder force is expected to become attractive and exhibit a topological signature, being proportional to $(Cα)^2/(1+(Cα)^2)$, where $α$ is the fine-structure constant. |
| title | Casimir-Polder interaction between an atom and a Chern insulator: topological signature and long-range repulsion |
| topic | Quantum Physics Mesoscale and Nanoscale Physics Materials Science Atomic Physics Optics |
| url | https://arxiv.org/abs/2411.01934 |