Two-site reduced density matrix from one- and two-particle Green's functions
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arXiv
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| Hauptverfasser: | , , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2023
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| _version_ | 1866911889472094208 |
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| author | Roósz, Gergő Kauch, Anna Bippus, Frederic Wieser, Daniel Held, Karsten |
| author_facet | Roósz, Gergő Kauch, Anna Bippus, Frederic Wieser, Daniel Held, Karsten |
| contents | Strongly correlated electron systems are challenging to calculate, and entanglement in such systems is not widely analyzed.
We present an approach that can be used as a post-processing step for calculating the two-site reduced density matrix and from it entanglement measures such as the mutual information and entanglement negativity. Input is only the one- and two-particle Green's function which is the output of numerous many-body methods.
As an illustration, we present results for a toy model, the Hubbard model on a $2\times2$ cluster and a $6$ site ring. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_14275 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Two-site reduced density matrix from one- and two-particle Green's functions Roósz, Gergő Kauch, Anna Bippus, Frederic Wieser, Daniel Held, Karsten Strongly Correlated Electrons Strongly correlated electron systems are challenging to calculate, and entanglement in such systems is not widely analyzed. We present an approach that can be used as a post-processing step for calculating the two-site reduced density matrix and from it entanglement measures such as the mutual information and entanglement negativity. Input is only the one- and two-particle Green's function which is the output of numerous many-body methods. As an illustration, we present results for a toy model, the Hubbard model on a $2\times2$ cluster and a $6$ site ring. |
| title | Two-site reduced density matrix from one- and two-particle Green's functions |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2312.14275 |