Orbital-resolved three-body recombination across a p-wave Feshbach resonance in ultracold $^6$Li
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912742838894592 |
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| author | Liu, Shaokun Xu, Zhekang Peng, Shuai Peng, Sijia Shu, Tangqian Li, Jiaming Luo, Le |
| author_facet | Liu, Shaokun Xu, Zhekang Peng, Shuai Peng, Sijia Shu, Tangqian Li, Jiaming Luo, Le |
| contents | We report precision, orbital-resolved measurements of three-body recombination near the 159~G $p$-wave Feshbach resonance in an ultracold gas of $^{6}$Li atoms prepared in their lowest hyperfine state. Using a radio-frequency gated protocol that suppresses magnetic-field transients below the milligauss level, we resolve loss features associated with the $|m_\ell|=1$ and $m_\ell=0$ orbital projections. The measured three-body loss coefficient $L_3$ is well captured by a thermally averaged cascade-recombination model, enabling extraction of the resonance splitting $δB$ and effective-range parameter $k_e$. At the lowest temperature, we obtain $δB = 7.6(3)$~mG and $k_e = 0.151(6)\,a_0^{-1}$, both in quantitative agreement with coupled-channel theory. These results establish orbital-resolved three-body spectroscopy as a precision probe of $p$-wave scattering and provide a benchmark for microscopic models of resonant few-body loss. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_02479 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Orbital-resolved three-body recombination across a p-wave Feshbach resonance in ultracold $^6$Li Liu, Shaokun Xu, Zhekang Peng, Shuai Peng, Sijia Shu, Tangqian Li, Jiaming Luo, Le Quantum Gases We report precision, orbital-resolved measurements of three-body recombination near the 159~G $p$-wave Feshbach resonance in an ultracold gas of $^{6}$Li atoms prepared in their lowest hyperfine state. Using a radio-frequency gated protocol that suppresses magnetic-field transients below the milligauss level, we resolve loss features associated with the $|m_\ell|=1$ and $m_\ell=0$ orbital projections. The measured three-body loss coefficient $L_3$ is well captured by a thermally averaged cascade-recombination model, enabling extraction of the resonance splitting $δB$ and effective-range parameter $k_e$. At the lowest temperature, we obtain $δB = 7.6(3)$~mG and $k_e = 0.151(6)\,a_0^{-1}$, both in quantitative agreement with coupled-channel theory. These results establish orbital-resolved three-body spectroscopy as a precision probe of $p$-wave scattering and provide a benchmark for microscopic models of resonant few-body loss. |
| title | Orbital-resolved three-body recombination across a p-wave Feshbach resonance in ultracold $^6$Li |
| topic | Quantum Gases |
| url | https://arxiv.org/abs/2512.02479 |