Tunable Field-Linked $s$-wave Interactions in Dipolar Fermi Mixtures
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866911698966806528 |
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| author | Li, Jing-Lun Koutentakis, Georgios M. Hrast, Mateja Lemeshko, Mikhail Schindewolf, Andreas Alhyder, Ragheed |
| author_facet | Li, Jing-Lun Koutentakis, Georgios M. Hrast, Mateja Lemeshko, Mikhail Schindewolf, Andreas Alhyder, Ragheed |
| contents | Spin mixtures of degenerate fermions are a cornerstone of quantum many-body physics, enabling superfluidity, polarons, and rich spin dynamics through $s$-wave scattering resonances. Combining them with strong, long-range dipolar interactions provides highly flexible control schemes promising even more exotic quantum phases. Recently, microwave shielding gave access to spin-polarized degenerate samples of dipolar fermionic molecules, where tunable $p$-wave interactions were enabled by field-linked resonances available only by compromising the shielding. Here, we study the scattering properties of a fermionic dipolar spin mixture and show that a universal $s$-wave resonance is readily accessible without compromising the shielding. We develop a universal description of the tunable $s$-wave interaction and weakly bound tetratomic states based on the microwave-field parameters. The $s$-wave resonance paves the way to stable, controllable and strongly-interacting dipolar spin mixtures of deeply degenerate fermions and supports favorable conditions to reach this regime via evaporative cooling. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_23318 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Tunable Field-Linked $s$-wave Interactions in Dipolar Fermi Mixtures Li, Jing-Lun Koutentakis, Georgios M. Hrast, Mateja Lemeshko, Mikhail Schindewolf, Andreas Alhyder, Ragheed Quantum Gases Atomic and Molecular Clusters Spin mixtures of degenerate fermions are a cornerstone of quantum many-body physics, enabling superfluidity, polarons, and rich spin dynamics through $s$-wave scattering resonances. Combining them with strong, long-range dipolar interactions provides highly flexible control schemes promising even more exotic quantum phases. Recently, microwave shielding gave access to spin-polarized degenerate samples of dipolar fermionic molecules, where tunable $p$-wave interactions were enabled by field-linked resonances available only by compromising the shielding. Here, we study the scattering properties of a fermionic dipolar spin mixture and show that a universal $s$-wave resonance is readily accessible without compromising the shielding. We develop a universal description of the tunable $s$-wave interaction and weakly bound tetratomic states based on the microwave-field parameters. The $s$-wave resonance paves the way to stable, controllable and strongly-interacting dipolar spin mixtures of deeply degenerate fermions and supports favorable conditions to reach this regime via evaporative cooling. |
| title | Tunable Field-Linked $s$-wave Interactions in Dipolar Fermi Mixtures |
| topic | Quantum Gases Atomic and Molecular Clusters |
| url | https://arxiv.org/abs/2506.23318 |