Out of Time Order Correlation of the Hubbard Model with Random Local Disorder
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
| Veröffentlicht: |
2024
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| _version_ | 1866915804765749248 |
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| author | Rangi, Chakradhar Moreno, Juana Tam, Ka-Ming |
| author_facet | Rangi, Chakradhar Moreno, Juana Tam, Ka-Ming |
| contents | The out of time order correlator (OTOC) serves as a powerful tool for investigating quantum information spreading and chaos in complex systems. We present a method employing non-equilibrium dynamical mean-field theory (DMFT) and coherent potential approximation (CPA) combined with diagrammatic perturbation on the Schwinger-Keldysh contour to calculate the OTOC for correlated fermionic systems subjected to both random disorder and electrons interaction. Our key finding is that random disorder enhances the OTOC decay in the Hubbard model for the metallic phase in the weak coupling limit. However, the current limitation of our perturbative solver restricts the applicability to weak interaction regimes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_03214 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Out of Time Order Correlation of the Hubbard Model with Random Local Disorder Rangi, Chakradhar Moreno, Juana Tam, Ka-Ming Strongly Correlated Electrons Disordered Systems and Neural Networks The out of time order correlator (OTOC) serves as a powerful tool for investigating quantum information spreading and chaos in complex systems. We present a method employing non-equilibrium dynamical mean-field theory (DMFT) and coherent potential approximation (CPA) combined with diagrammatic perturbation on the Schwinger-Keldysh contour to calculate the OTOC for correlated fermionic systems subjected to both random disorder and electrons interaction. Our key finding is that random disorder enhances the OTOC decay in the Hubbard model for the metallic phase in the weak coupling limit. However, the current limitation of our perturbative solver restricts the applicability to weak interaction regimes. |
| title | Out of Time Order Correlation of the Hubbard Model with Random Local Disorder |
| topic | Strongly Correlated Electrons Disordered Systems and Neural Networks |
| url | https://arxiv.org/abs/2403.03214 |