Emergent $s$-wave interactions in orbitally active quasi-two-dimensional Fermi gases
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866908442600407040 |
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| author | Dale, Colin J. Xie, Kevin G. S. Grehan, Kiera Pond Zhang, Shizhong Maki, Jeff Thywissen, Joseph H. |
| author_facet | Dale, Colin J. Xie, Kevin G. S. Grehan, Kiera Pond Zhang, Shizhong Maki, Jeff Thywissen, Joseph H. |
| contents | We investigate the scattering properties and bound states of a quasi-two-dimensional (q2D) spin-polarized Fermi gas near a $p$-wave Feshbach resonance. Strong confinement promotes the out-of-plane spatial wave functions to a discrete, gapped orbital degree of freedom. Exchange-antisymmetric orbital pair wave functions are predicted to give rise to low-energy q2D interactions with $s$-wave symmetry. Using radiofrequency (rf) spectroscopy, we observe the signature power-law scaling and the dimensional-crossover feature anticipated for the emergent $s$-wave channel. Additionally, we demonstrate that two types of low-energy dimers, with either $s$-wave and $p$-wave symmetry, could be formed via rf spin-flip association from an orbital mixture. These findings illustrate how gapped orbital degrees of freedom can provide additional control over scattering symmetries in strongly confined ultracold gases. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_00737 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Emergent $s$-wave interactions in orbitally active quasi-two-dimensional Fermi gases Dale, Colin J. Xie, Kevin G. S. Grehan, Kiera Pond Zhang, Shizhong Maki, Jeff Thywissen, Joseph H. Quantum Gases Atomic Physics We investigate the scattering properties and bound states of a quasi-two-dimensional (q2D) spin-polarized Fermi gas near a $p$-wave Feshbach resonance. Strong confinement promotes the out-of-plane spatial wave functions to a discrete, gapped orbital degree of freedom. Exchange-antisymmetric orbital pair wave functions are predicted to give rise to low-energy q2D interactions with $s$-wave symmetry. Using radiofrequency (rf) spectroscopy, we observe the signature power-law scaling and the dimensional-crossover feature anticipated for the emergent $s$-wave channel. Additionally, we demonstrate that two types of low-energy dimers, with either $s$-wave and $p$-wave symmetry, could be formed via rf spin-flip association from an orbital mixture. These findings illustrate how gapped orbital degrees of freedom can provide additional control over scattering symmetries in strongly confined ultracold gases. |
| title | Emergent $s$-wave interactions in orbitally active quasi-two-dimensional Fermi gases |
| topic | Quantum Gases Atomic Physics |
| url | https://arxiv.org/abs/2408.00737 |