2 papers
cond-mat.str-el2026
Cuprate d-wave superconductivity based on Non perturbative many body theory for spin fluctuation
Jianwei Gong, Junnian Xiong, Ruitao Xiao +4
We employ the nonperturbative many-body spin GW method to compute the single-particle Green's function, and the covariance method to evaluate the correlation functions of two body,…
cond-mat.str-el2026
Nonpertubative Many-Body Theory for the Two-Dimensional Hubbard Model at Low Temperature: From Weak to Strong Coupling Regimes
Ruitao Xiao, Yingze Su, Junnian Xiong +3
In theoretical studies of two-dimensional (2D) systems, the Mermin-Wagner theorem prevents continuous symmetry breaking at any finite temperature, thus forbidding a Landau phase tr…