A two-point Padé interpolation method provides global approximations to correlation functions by bridging weak and strong coupling perturbative expansions, with good convergence shown in lattice φ⁴ theory and reasonable accuracy in the 2D Hubbard model.
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Global approximations to correlation functions of strongly interacting quantum field theories
A two-point Padé interpolation method provides global approximations to correlation functions by bridging weak and strong coupling perturbative expansions, with good convergence shown in lattice φ⁴ theory and reasonable accuracy in the 2D Hubbard model.