Light-induced Magnetization by Quantum Geometry
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arXiv
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866909990421266432 |
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| author | Yoshida, Hiroki Yokoyama, Takehito |
| author_facet | Yoshida, Hiroki Yokoyama, Takehito |
| contents | We propose a mechanism for the inverse Faraday and the inverse Cotton--Mouton effects arising from quantum geometry, characterized by the quantum metric quadrupole and the weighted quantum metric. Within a semiclassical framework based on the Boltzmann transport theory, we establish a general formalism describing light-induced magnetization in electronic systems as a second-order response to the electric field of light. Using continuum and tight-binding models, we discuss the symmetry constraints on these effects and estimate the magnitudes of the resulting magnetizations. Our results highlight a direct manifestation of quantum-geometric quantities in nonlinear magneto-optical responses and suggest a viable pathway for experimental detection. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_09637 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Light-induced Magnetization by Quantum Geometry Yoshida, Hiroki Yokoyama, Takehito Materials Science Mesoscale and Nanoscale Physics Optics Quantum Physics We propose a mechanism for the inverse Faraday and the inverse Cotton--Mouton effects arising from quantum geometry, characterized by the quantum metric quadrupole and the weighted quantum metric. Within a semiclassical framework based on the Boltzmann transport theory, we establish a general formalism describing light-induced magnetization in electronic systems as a second-order response to the electric field of light. Using continuum and tight-binding models, we discuss the symmetry constraints on these effects and estimate the magnitudes of the resulting magnetizations. Our results highlight a direct manifestation of quantum-geometric quantities in nonlinear magneto-optical responses and suggest a viable pathway for experimental detection. |
| title | Light-induced Magnetization by Quantum Geometry |
| topic | Materials Science Mesoscale and Nanoscale Physics Optics Quantum Physics |
| url | https://arxiv.org/abs/2601.09637 |