Floquet-Engineering of Feshbach Resonances in Ultracold Gases
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866909838568587264 |
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| author | Guthmann, Alexander Lang, Felix Kienesberger, Louisa Marie Barbosa, Sian Widera, Artur |
| author_facet | Guthmann, Alexander Lang, Felix Kienesberger, Louisa Marie Barbosa, Sian Widera, Artur |
| contents | Scattering resonances are fundamental in science, spanning energy scales from stellar nuclear fusion to ultracold collisions. In ultracold quantum gases, magnetic Feshbach resonances have transformed quantum many-body research by enabling precise interaction control between atoms. Here, we demonstrate unprecedented control to engineer new Feshbach resonances at tunable positions via Floquet driving in a $^{6}$Li atom gas, achieved through strong magnetic field modulation at MHz frequencies. This periodic modulation creates new resonances whenever dressed molecular levels cross the atomic threshold. By adding a second modulation at twice the base frequency, we tune the asymmetry of resonance loss profiles and suppress two-body losses from Floquet heating. This technique enhances control over atomic interactions, expanding possibilities for quantum simulations of complex systems and studies of exotic quantum phases. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_05454 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Floquet-Engineering of Feshbach Resonances in Ultracold Gases Guthmann, Alexander Lang, Felix Kienesberger, Louisa Marie Barbosa, Sian Widera, Artur Quantum Gases Atomic Physics Scattering resonances are fundamental in science, spanning energy scales from stellar nuclear fusion to ultracold collisions. In ultracold quantum gases, magnetic Feshbach resonances have transformed quantum many-body research by enabling precise interaction control between atoms. Here, we demonstrate unprecedented control to engineer new Feshbach resonances at tunable positions via Floquet driving in a $^{6}$Li atom gas, achieved through strong magnetic field modulation at MHz frequencies. This periodic modulation creates new resonances whenever dressed molecular levels cross the atomic threshold. By adding a second modulation at twice the base frequency, we tune the asymmetry of resonance loss profiles and suppress two-body losses from Floquet heating. This technique enhances control over atomic interactions, expanding possibilities for quantum simulations of complex systems and studies of exotic quantum phases. |
| title | Floquet-Engineering of Feshbach Resonances in Ultracold Gases |
| topic | Quantum Gases Atomic Physics |
| url | https://arxiv.org/abs/2503.05454 |