Homogeneous fermionic Hubbard gases in a flat-top optical lattice
Fuente:
arXiv
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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866916609871839232 |
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| author | Wang, Yu-Xuan Shao, Hou-Ji Zhu, Yan-Song Zhu, De-Zhi Sun, Hao-Nan Chen, Si-Yuan Yao, Xing-Can Chen, Yu-Ao Pan, Jian-Wei |
| author_facet | Wang, Yu-Xuan Shao, Hou-Ji Zhu, Yan-Song Zhu, De-Zhi Sun, Hao-Nan Chen, Si-Yuan Yao, Xing-Can Chen, Yu-Ao Pan, Jian-Wei |
| contents | Fermionic atoms in a large-scale, homogeneous optical lattice provide an ideal quantum simulator for investigating the fermionic Hubbard model, yet achieving this remains challenging. Here, by developing a hybrid potential that integrates a flat-top optical lattice with an optical box trap, we successfully realize the creation of three-dimensional, homogeneous fermionic Hubbard gases across approximately $8\times10^5$ lattice sites. This homogeneous system enables us to capture a well-defined energy band occupation that aligns perfectly with the theoretical calculations for a zero-temperature, ideal fermionic Hubbard model. Furthermore, by employing novel radio-frequency spectroscopy, we precisely measure the doublon fraction $D$ as a function of interaction strength $U$ and temperature $T$, respectively. The crossover from metal to Mott insulator is detected, where $D$ smoothly decreases with increasing $U$. More importantly, we observe a non-monotonic temperature dependence in $D$, revealing the Pomeranchuk effect and the development of extended antiferromagnetic correlations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_08104 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Homogeneous fermionic Hubbard gases in a flat-top optical lattice Wang, Yu-Xuan Shao, Hou-Ji Zhu, Yan-Song Zhu, De-Zhi Sun, Hao-Nan Chen, Si-Yuan Yao, Xing-Can Chen, Yu-Ao Pan, Jian-Wei Quantum Gases Strongly Correlated Electrons Quantum Physics Fermionic atoms in a large-scale, homogeneous optical lattice provide an ideal quantum simulator for investigating the fermionic Hubbard model, yet achieving this remains challenging. Here, by developing a hybrid potential that integrates a flat-top optical lattice with an optical box trap, we successfully realize the creation of three-dimensional, homogeneous fermionic Hubbard gases across approximately $8\times10^5$ lattice sites. This homogeneous system enables us to capture a well-defined energy band occupation that aligns perfectly with the theoretical calculations for a zero-temperature, ideal fermionic Hubbard model. Furthermore, by employing novel radio-frequency spectroscopy, we precisely measure the doublon fraction $D$ as a function of interaction strength $U$ and temperature $T$, respectively. The crossover from metal to Mott insulator is detected, where $D$ smoothly decreases with increasing $U$. More importantly, we observe a non-monotonic temperature dependence in $D$, revealing the Pomeranchuk effect and the development of extended antiferromagnetic correlations. |
| title | Homogeneous fermionic Hubbard gases in a flat-top optical lattice |
| topic | Quantum Gases Strongly Correlated Electrons Quantum Physics |
| url | https://arxiv.org/abs/2502.08104 |