Scattering resonances and pairing in a Rabi-coupled Fermi gas
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866912653233881088 |
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| author | Bleu, Olivier Mulkerin, Brendan C. Cabrera, Cesar R. Levinsen, Jesper Parish, Meera M. |
| author_facet | Bleu, Olivier Mulkerin, Brendan C. Cabrera, Cesar R. Levinsen, Jesper Parish, Meera M. |
| contents | We investigate the possibility of using a Rabi drive to tune the interactions in an atomic Fermi gas. Specifically, we consider the scenario where two fermion species (spins) are Rabi coupled and interacting with a third uncoupled species. Using an exact calculation within a minimal low-energy model, we derive analytical expressions for the effective scattering length and effective range that characterize the collisions between a Rabi-dressed atom and an atom from the third species. In particular, we find that new scattering resonances emerge in the Rabi-coupled system, which we demonstrate are linked to the existence of hybrid two-body bound states. Furthermore, we show via a generalized Thouless criterion that the scattering properties have a direct impact on the superfluid transitions in the Rabi-coupled Fermi gas. The presence of Rabi-induced resonances thus has implications for the investigation of many-body physics with driven atomic gases. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_10976 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Scattering resonances and pairing in a Rabi-coupled Fermi gas Bleu, Olivier Mulkerin, Brendan C. Cabrera, Cesar R. Levinsen, Jesper Parish, Meera M. Quantum Gases Quantum Physics We investigate the possibility of using a Rabi drive to tune the interactions in an atomic Fermi gas. Specifically, we consider the scenario where two fermion species (spins) are Rabi coupled and interacting with a third uncoupled species. Using an exact calculation within a minimal low-energy model, we derive analytical expressions for the effective scattering length and effective range that characterize the collisions between a Rabi-dressed atom and an atom from the third species. In particular, we find that new scattering resonances emerge in the Rabi-coupled system, which we demonstrate are linked to the existence of hybrid two-body bound states. Furthermore, we show via a generalized Thouless criterion that the scattering properties have a direct impact on the superfluid transitions in the Rabi-coupled Fermi gas. The presence of Rabi-induced resonances thus has implications for the investigation of many-body physics with driven atomic gases. |
| title | Scattering resonances and pairing in a Rabi-coupled Fermi gas |
| topic | Quantum Gases Quantum Physics |
| url | https://arxiv.org/abs/2503.10976 |