Finite Temperature Minimal Entangled Typical Thermal States Impurity Solver
Fuente:
arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866911999773900800 |
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| author | Cao, Xiaodong Stoudenmire, E. Miles Parcollet, Olivier |
| author_facet | Cao, Xiaodong Stoudenmire, E. Miles Parcollet, Olivier |
| contents | We present a minimally entangled typical thermal state (METTS) quantum impurity solver for general multi-orbital systems at finite temperatures. We introduce an improved estimator for the single-particle Green's function that strongly reduces the large fluctuations at long imaginary time and low temperature, which were a severe limitation of the original algorithm. In combination with the fork tensor product states ansatz, we obtain a dynamical mean field theory (DMFT) quantum impurity solver, which we benchmark for single and three-band models down to low temperatures, including the effect of spin-orbit coupling in a realistic DMFT computation for the Hund's metal Sr$_2$RuO$_4$ down to low temperatures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_13668 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Finite Temperature Minimal Entangled Typical Thermal States Impurity Solver Cao, Xiaodong Stoudenmire, E. Miles Parcollet, Olivier Strongly Correlated Electrons We present a minimally entangled typical thermal state (METTS) quantum impurity solver for general multi-orbital systems at finite temperatures. We introduce an improved estimator for the single-particle Green's function that strongly reduces the large fluctuations at long imaginary time and low temperature, which were a severe limitation of the original algorithm. In combination with the fork tensor product states ansatz, we obtain a dynamical mean field theory (DMFT) quantum impurity solver, which we benchmark for single and three-band models down to low temperatures, including the effect of spin-orbit coupling in a realistic DMFT computation for the Hund's metal Sr$_2$RuO$_4$ down to low temperatures. |
| title | Finite Temperature Minimal Entangled Typical Thermal States Impurity Solver |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2312.13668 |