Orbital-Dependent Dimensional Crossover of a $p$-Wave Feshbach Resonance
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866911478884335616 |
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| author | Yu, Hang Sun, Liao Liu, Shaokun Peng, Shuai Li, Jiaming Luo, Le |
| author_facet | Yu, Hang Sun, Liao Liu, Shaokun Peng, Shuai Li, Jiaming Luo, Le |
| contents | We report the observation of a dimensional crossover of a narrow $p$-wave Feshbach resonance in an ultracold, spin-polarized $^6$Li Fermi gas confined by a one-dimensional optical lattice. In the three-dimensional limit, atom loss near the resonance has a larger contribution from the $|m_l|=1$ channel, reflecting its twofold orbital degeneracy in an isotropic system. As the lattice confinement is increased and the system approaches the quasi-two-dimensional regime, the relative contributions of the $|m_l|=1$ and $m_l=0$ channels evolve continuously, with an apparent suppression of the $|m_l|=1$ feature. By quantitatively analyzing both the orbital branching ratio and confinement-induced shift of the orbital splitting, we show that this evolution arises from an orbital-dependent modification of $p$-wave interactions induced by reduced dimensionality. Our results establish dimensional confinement as a powerful tool for controlling orbital degrees of freedom in resonantly interacting Fermi gases, and provide new insight into how reduced dimensionality reshapes anisotropic interactions in quantum matter. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_01818 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Orbital-Dependent Dimensional Crossover of a $p$-Wave Feshbach Resonance Yu, Hang Sun, Liao Liu, Shaokun Peng, Shuai Li, Jiaming Luo, Le Quantum Gases We report the observation of a dimensional crossover of a narrow $p$-wave Feshbach resonance in an ultracold, spin-polarized $^6$Li Fermi gas confined by a one-dimensional optical lattice. In the three-dimensional limit, atom loss near the resonance has a larger contribution from the $|m_l|=1$ channel, reflecting its twofold orbital degeneracy in an isotropic system. As the lattice confinement is increased and the system approaches the quasi-two-dimensional regime, the relative contributions of the $|m_l|=1$ and $m_l=0$ channels evolve continuously, with an apparent suppression of the $|m_l|=1$ feature. By quantitatively analyzing both the orbital branching ratio and confinement-induced shift of the orbital splitting, we show that this evolution arises from an orbital-dependent modification of $p$-wave interactions induced by reduced dimensionality. Our results establish dimensional confinement as a powerful tool for controlling orbital degrees of freedom in resonantly interacting Fermi gases, and provide new insight into how reduced dimensionality reshapes anisotropic interactions in quantum matter. |
| title | Orbital-Dependent Dimensional Crossover of a $p$-Wave Feshbach Resonance |
| topic | Quantum Gases |
| url | https://arxiv.org/abs/2603.01818 |