Temperature-Controlled Resonance in a Heteronuclear Quantum Gas Mixture
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866909053951672320 |
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| author | Yang, Xiaoyi Xu, Tianyu Ma, Shengli Wu, Zhigang Zhang, Ren |
| author_facet | Yang, Xiaoyi Xu, Tianyu Ma, Shengli Wu, Zhigang Zhang, Ren |
| contents | Single-channel resonances are fundamental processes in scattering of atoms, yet their occurrence is largely incidental and lacks systematic control. In this Letter, we propose a mechanism to realize a continuously tunable single-channel resonance by controlling the temperature of the heteronuclear mixture. By extending the Casimir-like mediated interaction to finite temperature, we demonstrate that thermal smearing of the Fermi surface reshapes the effective potential between impurities, giving rise to a temperature-controlled resonance (TCR) over a wide parameter range. As a direct consequence, the resonance position shifts systematically with temperature variation, providing a clear experimental signature of this mechanism. We further investigate the quench dynamics of a Bose gas immersed in a Fermi sea and demonstrate that the observed temperature-dependent loss features in recent experiments are consistent with the TCR mechanism. Our results establish temperature as a simple and experimentally accessible control knob for single-channel resonances in ultracold quantum gases. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_17931 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Temperature-Controlled Resonance in a Heteronuclear Quantum Gas Mixture Yang, Xiaoyi Xu, Tianyu Ma, Shengli Wu, Zhigang Zhang, Ren Quantum Gases Quantum Physics Single-channel resonances are fundamental processes in scattering of atoms, yet their occurrence is largely incidental and lacks systematic control. In this Letter, we propose a mechanism to realize a continuously tunable single-channel resonance by controlling the temperature of the heteronuclear mixture. By extending the Casimir-like mediated interaction to finite temperature, we demonstrate that thermal smearing of the Fermi surface reshapes the effective potential between impurities, giving rise to a temperature-controlled resonance (TCR) over a wide parameter range. As a direct consequence, the resonance position shifts systematically with temperature variation, providing a clear experimental signature of this mechanism. We further investigate the quench dynamics of a Bose gas immersed in a Fermi sea and demonstrate that the observed temperature-dependent loss features in recent experiments are consistent with the TCR mechanism. Our results establish temperature as a simple and experimentally accessible control knob for single-channel resonances in ultracold quantum gases. |
| title | Temperature-Controlled Resonance in a Heteronuclear Quantum Gas Mixture |
| topic | Quantum Gases Quantum Physics |
| url | https://arxiv.org/abs/2605.17931 |