In-situ Observation of Magnetostriction Crossover in a Strongly Dipolar Two-Dimensional Bose Gas
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arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866911576672436224 |
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| author | He, Yifei Gao, Xin-Yuan Zhen, Haoting Parit, Mithilesh K. Yan, Yangqian Jo, Gyu-Boong |
| author_facet | He, Yifei Gao, Xin-Yuan Zhen, Haoting Parit, Mithilesh K. Yan, Yangqian Jo, Gyu-Boong |
| contents | Magnetostriction, the anisotropic spatial deformation, is a hallmark of dipolar gases with strong long-range interactions, yet it poses a challenge for in-situ characterization. Here, we observe a magnetostriction crossover from the strongly anisotropic superfluid phase to the nearly isotropic normal phase using in-situ imaging of quasi-two-dimensional 166Er gases. Then, we develop a quasi-2D Hartree-Fock-mean-field framework that provides a robust tool for interaction-aware thermometry, enabling the determination of temperature and chemical potential across all dipole orientations from a single fit. We further demonstrate that the low-density wings effectively obey a local-density equation of state. Finally, we reveals the crossover from the isotropic thermal wings to the anisotropic coherent core in a single in-situ image, providing a pathway for future accurate studies of strongly dipolar superfluidity and thermodynamics in 2D. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_07194 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | In-situ Observation of Magnetostriction Crossover in a Strongly Dipolar Two-Dimensional Bose Gas He, Yifei Gao, Xin-Yuan Zhen, Haoting Parit, Mithilesh K. Yan, Yangqian Jo, Gyu-Boong Quantum Gases Magnetostriction, the anisotropic spatial deformation, is a hallmark of dipolar gases with strong long-range interactions, yet it poses a challenge for in-situ characterization. Here, we observe a magnetostriction crossover from the strongly anisotropic superfluid phase to the nearly isotropic normal phase using in-situ imaging of quasi-two-dimensional 166Er gases. Then, we develop a quasi-2D Hartree-Fock-mean-field framework that provides a robust tool for interaction-aware thermometry, enabling the determination of temperature and chemical potential across all dipole orientations from a single fit. We further demonstrate that the low-density wings effectively obey a local-density equation of state. Finally, we reveals the crossover from the isotropic thermal wings to the anisotropic coherent core in a single in-situ image, providing a pathway for future accurate studies of strongly dipolar superfluidity and thermodynamics in 2D. |
| title | In-situ Observation of Magnetostriction Crossover in a Strongly Dipolar Two-Dimensional Bose Gas |
| topic | Quantum Gases |
| url | https://arxiv.org/abs/2604.07194 |