Realization of fractional Fermi seas
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arXiv
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| Auteurs principaux: | , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866913145853837312 |
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| author | Zeng, Yi Bastianello, Alvise Dhar, Sudipta Wang, Zekui Yu, Xudong Horvath, Milena Astrakharchik, Grigori E. Guo, Yanliang Nägerl, Hanns-Christoph Landini, Manuele |
| author_facet | Zeng, Yi Bastianello, Alvise Dhar, Sudipta Wang, Zekui Yu, Xudong Horvath, Milena Astrakharchik, Grigori E. Guo, Yanliang Nägerl, Hanns-Christoph Landini, Manuele |
| contents | The Pauli exclusion principle is a cornerstone of quantum physics: it governs the structure of matter. Extensions of this principle, such as Haldane's generalized exclusion statistics, predict the existence of exotic quantum states characterized by fractional Fermi seas (FFS), i.e. momentum distributions with uniform but fractional occupancies. Here, we report the experimental realization of fractional Fermi seas in an excited one-dimensional Bose gas prepared through ramping cycles in the interaction strength. The resulting excited yet stable Bose-gas states exhibit Friedel oscillations, smoking-gun signatures of the underlying FFS. The stabilization of these states offers an opportunity to deepen our understanding of quantum thermodynamics in the presence of exotic statistics and paves the way for applications in quantum information and sensing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_17657 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Realization of fractional Fermi seas Zeng, Yi Bastianello, Alvise Dhar, Sudipta Wang, Zekui Yu, Xudong Horvath, Milena Astrakharchik, Grigori E. Guo, Yanliang Nägerl, Hanns-Christoph Landini, Manuele Quantum Gases Statistical Mechanics Atomic Physics The Pauli exclusion principle is a cornerstone of quantum physics: it governs the structure of matter. Extensions of this principle, such as Haldane's generalized exclusion statistics, predict the existence of exotic quantum states characterized by fractional Fermi seas (FFS), i.e. momentum distributions with uniform but fractional occupancies. Here, we report the experimental realization of fractional Fermi seas in an excited one-dimensional Bose gas prepared through ramping cycles in the interaction strength. The resulting excited yet stable Bose-gas states exhibit Friedel oscillations, smoking-gun signatures of the underlying FFS. The stabilization of these states offers an opportunity to deepen our understanding of quantum thermodynamics in the presence of exotic statistics and paves the way for applications in quantum information and sensing. |
| title | Realization of fractional Fermi seas |
| topic | Quantum Gases Statistical Mechanics Atomic Physics |
| url | https://arxiv.org/abs/2602.17657 |