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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2508.14360 |
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| _version_ | 1866908495596486656 |
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| author | Zheng, Zhen Zhu, Shi-Liang Wang, Z. D. |
| author_facet | Zheng, Zhen Zhu, Shi-Liang Wang, Z. D. |
| contents | The many-body physics of higher-spin systems is expected to host qualitatively new matter phases, but realizing them requires the controllable multispin interactions that can be tuned independently for each spin component. Here we propose a scheme that meets this demand in ultracold Fermi gases. By engineering the atom-cavity coupling, we generate cavity-mediated effective interactions between arbitrary pseudo-spin states. Focusing on the simplest three-spin case, we obtain two independent scattering channels whose strengths and signs can be adjusted separately. The resulting Hamiltonian combines the on-site attraction with the off-site repulsion, and drives a continuous transition from the superfluid to the spin-density-wave phase. The coexistence region is reminiscent of a supersolid, yet the self-organized modulation appears in the spin space of a higher-spin representation, rather than in the density profile. The proposal is reliable to be implemented using the existing techniques of ultracold atoms. Therefore it offers a versatile platform for quantum simulation of higher-spin many-body physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_14360 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Cavity-mediated multispin interactions and phase transitions in ultracold Fermi gases Zheng, Zhen Zhu, Shi-Liang Wang, Z. D. Quantum Gases The many-body physics of higher-spin systems is expected to host qualitatively new matter phases, but realizing them requires the controllable multispin interactions that can be tuned independently for each spin component. Here we propose a scheme that meets this demand in ultracold Fermi gases. By engineering the atom-cavity coupling, we generate cavity-mediated effective interactions between arbitrary pseudo-spin states. Focusing on the simplest three-spin case, we obtain two independent scattering channels whose strengths and signs can be adjusted separately. The resulting Hamiltonian combines the on-site attraction with the off-site repulsion, and drives a continuous transition from the superfluid to the spin-density-wave phase. The coexistence region is reminiscent of a supersolid, yet the self-organized modulation appears in the spin space of a higher-spin representation, rather than in the density profile. The proposal is reliable to be implemented using the existing techniques of ultracold atoms. Therefore it offers a versatile platform for quantum simulation of higher-spin many-body physics. |
| title | Cavity-mediated multispin interactions and phase transitions in ultracold Fermi gases |
| topic | Quantum Gases |
| url | https://arxiv.org/abs/2508.14360 |