Tunable Fujita-Miyazawa-Type Three-Body Force in Ultracold Atoms
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866912853754118144 |
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| author | Tajima, Hiroyuki Nakano, Eiji Iida, Kei |
| author_facet | Tajima, Hiroyuki Nakano, Eiji Iida, Kei |
| contents | We show how a Fujita-Miyazawa-type three-body force emerges among three impurity atoms immersed in an atomic Bose-Einstein condensate near an interspecies Feshbach resonance. As a result of thermal average over excitations in the medium and impurities as well as expansion with respect to the impurity-medium and Feshbach resonance couplings, two superfluid phonons and a closed channel resonance play a role in producing an effective three-body force, as in the original three-nucleon case in which two pions and a $Δ$ resonance are involved. The proposed Fujita-Miyazawa-type three-body force can be enhanced by tuning the closed-channel energy level via an external magnetic field, and moreover, its strength can be confirmed experimentally by measuring the impurity equation of state. Our result gives a new insight into an analogy between atomic polarons and nuclear few-body systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_19117 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Tunable Fujita-Miyazawa-Type Three-Body Force in Ultracold Atoms Tajima, Hiroyuki Nakano, Eiji Iida, Kei Quantum Gases Atomic Physics We show how a Fujita-Miyazawa-type three-body force emerges among three impurity atoms immersed in an atomic Bose-Einstein condensate near an interspecies Feshbach resonance. As a result of thermal average over excitations in the medium and impurities as well as expansion with respect to the impurity-medium and Feshbach resonance couplings, two superfluid phonons and a closed channel resonance play a role in producing an effective three-body force, as in the original three-nucleon case in which two pions and a $Δ$ resonance are involved. The proposed Fujita-Miyazawa-type three-body force can be enhanced by tuning the closed-channel energy level via an external magnetic field, and moreover, its strength can be confirmed experimentally by measuring the impurity equation of state. Our result gives a new insight into an analogy between atomic polarons and nuclear few-body systems. |
| title | Tunable Fujita-Miyazawa-Type Three-Body Force in Ultracold Atoms |
| topic | Quantum Gases Atomic Physics |
| url | https://arxiv.org/abs/2505.19117 |