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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2407.03737 |
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| _version_ | 1866912690732007424 |
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| author | Mosquera, Juan F. P. Cistaro, Giovanni Malakhov, Mikhail Pisanty, Emilio Dauphin, Alexandre Plaja, Luis Chacón, Alexis Lewenstein, Maciej Picón, Antonio |
| author_facet | Mosquera, Juan F. P. Cistaro, Giovanni Malakhov, Mikhail Pisanty, Emilio Dauphin, Alexandre Plaja, Luis Chacón, Alexis Lewenstein, Maciej Picón, Antonio |
| contents | We present a numerical experiment that demonstrates the possibility to capture topological phase transitions via an x-ray absorption spectroscopy scheme. We consider a Chern insulator whose topological phase is tuned via a second-order hopping. We perform time-dynamics simulations of the out-of-equilibrium laser-driven electron motion that enables us to model a realistic attosecond spectroscopy scheme. In particular, we use an ultrafast scheme with a circularly polarized IR pump pulse and an attosecond x-ray probe pulse. A laser-induced dichroism-type spectrum shows a clear signature of the topological phase transition. We are able to connect these signatures with the Berry structure of the system. This work extend the applications of attosecond absorption spectroscopy to systems presenting a non-trivial topological phase. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_03737 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Topological phase transitions via attosecond x-ray absorption spectroscopy Mosquera, Juan F. P. Cistaro, Giovanni Malakhov, Mikhail Pisanty, Emilio Dauphin, Alexandre Plaja, Luis Chacón, Alexis Lewenstein, Maciej Picón, Antonio Optics Quantum Physics We present a numerical experiment that demonstrates the possibility to capture topological phase transitions via an x-ray absorption spectroscopy scheme. We consider a Chern insulator whose topological phase is tuned via a second-order hopping. We perform time-dynamics simulations of the out-of-equilibrium laser-driven electron motion that enables us to model a realistic attosecond spectroscopy scheme. In particular, we use an ultrafast scheme with a circularly polarized IR pump pulse and an attosecond x-ray probe pulse. A laser-induced dichroism-type spectrum shows a clear signature of the topological phase transition. We are able to connect these signatures with the Berry structure of the system. This work extend the applications of attosecond absorption spectroscopy to systems presenting a non-trivial topological phase. |
| title | Topological phase transitions via attosecond x-ray absorption spectroscopy |
| topic | Optics Quantum Physics |
| url | https://arxiv.org/abs/2407.03737 |