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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2512.23237 |
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| _version_ | 1866915697991352320 |
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| author | Yu, Yang Zhang, Lei Gull, Emanuel Cao, Xiaodong Dong, Xinyang |
| author_facet | Yu, Yang Zhang, Lei Gull, Emanuel Cao, Xiaodong Dong, Xinyang |
| contents | We present the combination of a complex-time tensor-network impurity solver with an analytic continuation scheme based on exponential fitting as an efficient framework for single and multi-orbital dynamical mean-field calculations. By performing time-evolution along a complex-time contour, the approach balances computational cost with the difficulty of spectral recovery, offering greater flexibility than methods confined to the real or imaginary axis. By complementing the complex-time evolution with an exponential fitting scheme, we faithfully extract real-time information at negligible cost. The resulting method obtains high-resolution spectra at a significantly lower computational cost than real-time evolution, offering a promising tool for ab initio studies of strongly correlated materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_23237 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Multi-orbital dynamical mean-field theory with a complex-time solver Yu, Yang Zhang, Lei Gull, Emanuel Cao, Xiaodong Dong, Xinyang Strongly Correlated Electrons We present the combination of a complex-time tensor-network impurity solver with an analytic continuation scheme based on exponential fitting as an efficient framework for single and multi-orbital dynamical mean-field calculations. By performing time-evolution along a complex-time contour, the approach balances computational cost with the difficulty of spectral recovery, offering greater flexibility than methods confined to the real or imaginary axis. By complementing the complex-time evolution with an exponential fitting scheme, we faithfully extract real-time information at negligible cost. The resulting method obtains high-resolution spectra at a significantly lower computational cost than real-time evolution, offering a promising tool for ab initio studies of strongly correlated materials. |
| title | Multi-orbital dynamical mean-field theory with a complex-time solver |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2512.23237 |