Back-reaction and correlation effects on pre-thermalization in Mott-Hubbard systems
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866917911403167744 |
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| author | Queisser, Friedemann Kohlfürst, Christian Schützhold, Ralf |
| author_facet | Queisser, Friedemann Kohlfürst, Christian Schützhold, Ralf |
| contents | For the Fermi-Hubbard model in the strongly interacting Mott insulator state, we study the pre-thermalization dynamics after a quench. To this end, we employ the method of the hierarchy of correlations and compare different levels of accuracy. To leading order, the usual free quasi-particle dynamics (as encoded in the two-point correlation functions) yields the standard picture of pre-thermalization. Taking into account the back-reaction of these quasi-particle fluctuations onto the mean-field background as the first next-to-leading order effect, we observe a strong degradation of pre-thermalization, especially in low dimensions. In contrast, the inclusion of three-point correlations enhances pre-thermalization. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_11216 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Back-reaction and correlation effects on pre-thermalization in Mott-Hubbard systems Queisser, Friedemann Kohlfürst, Christian Schützhold, Ralf Strongly Correlated Electrons For the Fermi-Hubbard model in the strongly interacting Mott insulator state, we study the pre-thermalization dynamics after a quench. To this end, we employ the method of the hierarchy of correlations and compare different levels of accuracy. To leading order, the usual free quasi-particle dynamics (as encoded in the two-point correlation functions) yields the standard picture of pre-thermalization. Taking into account the back-reaction of these quasi-particle fluctuations onto the mean-field background as the first next-to-leading order effect, we observe a strong degradation of pre-thermalization, especially in low dimensions. In contrast, the inclusion of three-point correlations enhances pre-thermalization. |
| title | Back-reaction and correlation effects on pre-thermalization in Mott-Hubbard systems |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2310.11216 |