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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2602.20990 |
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| _version_ | 1866915814112755712 |
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| author | Cha, Min-Chul Kwon, Hoon Beom Lee, Ji-Woo Chung, Myung-Hoon |
| author_facet | Cha, Min-Chul Kwon, Hoon Beom Lee, Ji-Woo Chung, Myung-Hoon |
| contents | We study the entanglement properties of the one-dimensional dimerized Fermi-Hubbard model. Using a matrix-product-state approach, we compute the ground state and identify two insulating phases at 1/2- and 3/4-filling, along with a metallic phase, whose mechanisms can be characterized by their entanglement spectra. Our findings indicate that the two insulating phases are distinct, implying that the phase at 1/2-filling has a charge gap arising from the band gap, which is enhanced by repulsive interactions, while the phase at 3/4-filling exhibits a Mott gap resulting from particle interactions. This difference between the two insulating phases is reflected in the scaling properties of the half-chain entanglement entropy and the distribution of the entanglement spectrum. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_20990 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Entanglement Properties of the One-Dimensional Dimerized Fermi-Hubbard Model Cha, Min-Chul Kwon, Hoon Beom Lee, Ji-Woo Chung, Myung-Hoon Strongly Correlated Electrons We study the entanglement properties of the one-dimensional dimerized Fermi-Hubbard model. Using a matrix-product-state approach, we compute the ground state and identify two insulating phases at 1/2- and 3/4-filling, along with a metallic phase, whose mechanisms can be characterized by their entanglement spectra. Our findings indicate that the two insulating phases are distinct, implying that the phase at 1/2-filling has a charge gap arising from the band gap, which is enhanced by repulsive interactions, while the phase at 3/4-filling exhibits a Mott gap resulting from particle interactions. This difference between the two insulating phases is reflected in the scaling properties of the half-chain entanglement entropy and the distribution of the entanglement spectrum. |
| title | Entanglement Properties of the One-Dimensional Dimerized Fermi-Hubbard Model |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2602.20990 |