Many-body physics-induced selection rules: application to Raman spectroscopy
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2023
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| _version_ | 1866910416441966592 |
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| author | Benek-Lins, Igor Maiti, Saurabh |
| author_facet | Benek-Lins, Igor Maiti, Saurabh |
| contents | Spectroscopic measurements in quantum systems are subject to selection rules, usually based on space-time symmetries, that allow or disallow transitions between states. In many-body systems, in addition to the single-particle states, there emerge new ones due to collective excitations of the system. Here we demonstrate the existence of a "fragile" selection rule that emerges as a manifestation of many-body effects and outlines the conditions for collective excitations to couple to a given spectroscopic probe beyond the usual symmetry considerations. As an example, we apply the rule to Raman spectroscopy of multiband superconductors and settle some unresolved features in experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_13345 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Many-body physics-induced selection rules: application to Raman spectroscopy Benek-Lins, Igor Maiti, Saurabh Strongly Correlated Electrons Superconductivity Spectroscopic measurements in quantum systems are subject to selection rules, usually based on space-time symmetries, that allow or disallow transitions between states. In many-body systems, in addition to the single-particle states, there emerge new ones due to collective excitations of the system. Here we demonstrate the existence of a "fragile" selection rule that emerges as a manifestation of many-body effects and outlines the conditions for collective excitations to couple to a given spectroscopic probe beyond the usual symmetry considerations. As an example, we apply the rule to Raman spectroscopy of multiband superconductors and settle some unresolved features in experiments. |
| title | Many-body physics-induced selection rules: application to Raman spectroscopy |
| topic | Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2311.13345 |