Finite-temperature signatures of underlying superconductivity in the electron-doped Hubbard model
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866908601760612352 |
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| author | Wang, Wen O. Devereaux, Thomas P. |
| author_facet | Wang, Wen O. Devereaux, Thomas P. |
| contents | We perform numerically exact determinant quantum Monte Carlo simulations of the Hubbard model and analyze pairing tendencies by evaluating correlation functions at the imaginary-time midpoint ($τ=β/2$), which suppresses high-frequency weight and emphasizes low-energy physics. Using this diagnostic, we identify clear finite-temperature signatures of underlying $d$-wave superconductivity for electron doping, while finding no clear indication upon cooling for hole doping. Our analysis enables direct comparison with ground-state DMRG, revealing consistent real-space pairing patterns. These results provide a practical route to bridge the gap between finite-temperature and ground-state numerically exact simulations of the Hubbard model despite the fermion sign problem. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_16616 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Finite-temperature signatures of underlying superconductivity in the electron-doped Hubbard model Wang, Wen O. Devereaux, Thomas P. Superconductivity Strongly Correlated Electrons We perform numerically exact determinant quantum Monte Carlo simulations of the Hubbard model and analyze pairing tendencies by evaluating correlation functions at the imaginary-time midpoint ($τ=β/2$), which suppresses high-frequency weight and emphasizes low-energy physics. Using this diagnostic, we identify clear finite-temperature signatures of underlying $d$-wave superconductivity for electron doping, while finding no clear indication upon cooling for hole doping. Our analysis enables direct comparison with ground-state DMRG, revealing consistent real-space pairing patterns. These results provide a practical route to bridge the gap between finite-temperature and ground-state numerically exact simulations of the Hubbard model despite the fermion sign problem. |
| title | Finite-temperature signatures of underlying superconductivity in the electron-doped Hubbard model |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2510.16616 |