Finite-temperature signatures of underlying superconductivity in the electron-doped Hubbard model
ORAL
Abstract
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.
*W.O.W. acknowledges support from the Gordon and Betty Moore Foundation through Grant GBMF8690 to the University of California, Santa Barbara, to the Kavli Institute for Theoretical Physics (KITP). T.P.D. acknowledges support from the U.S. Department of Energy (DOE), Office of Basic Energy Sciences, Division of Materials Sciences and Engineering. Computational work was performed on the Sherlock cluster at Stanford University and on resources of the National Energy Research Scientific Computing Center, a US Department of Energy, Office of Science User Facility, using NERSC award BES-ERCAP0031425. This research was supported in part by grant NSF PHY-2309135 to the KITP.
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Publication: arXiv:2510.16616 [cond-mat.supr-con]
Presenters
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Wen O Wang
- University of California, Santa Barbara
- Stanford University