Two-site entanglement in the two-dimensional Hubbard model
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912850577981440 |
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| author | Bippus, Frederic Kauch, Anna Roósz, Gergő Mayrhofer, Christian Assaad, Fakher Held, Karsten |
| author_facet | Bippus, Frederic Kauch, Anna Roósz, Gergő Mayrhofer, Christian Assaad, Fakher Held, Karsten |
| contents | The study of entanglement in strongly correlated electron systems typically requires knowledge of the reduced density matrix. Here, we apply the parquet dynamical vertex approximation to study the two-site reduced density matrix at varying distance, in the Hubbard model at weak coupling. This allows us to investigate the spatial structure of entanglement in dependence of interaction strength, electron filling, and temperature. We compare results from different entanglement measures, and benchmark against quantum Monte Carlo. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_09780 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Two-site entanglement in the two-dimensional Hubbard model Bippus, Frederic Kauch, Anna Roósz, Gergő Mayrhofer, Christian Assaad, Fakher Held, Karsten Strongly Correlated Electrons The study of entanglement in strongly correlated electron systems typically requires knowledge of the reduced density matrix. Here, we apply the parquet dynamical vertex approximation to study the two-site reduced density matrix at varying distance, in the Hubbard model at weak coupling. This allows us to investigate the spatial structure of entanglement in dependence of interaction strength, electron filling, and temperature. We compare results from different entanglement measures, and benchmark against quantum Monte Carlo. |
| title | Two-site entanglement in the two-dimensional Hubbard model |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2506.09780 |