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We apply pseudospectral methods to construct global solutions of functional renormalization group equations in field space to high accuracy. For this, we introduce a basis to resolve both finite as well as asymptotic regions of effective potentials. Our approach is benchmarked using the critical behavior of the scalar O (1) model, providing results for the global fixed point potential as well as leading critical exponents and their respective global eigenfunctions. We provide new results for (1) multicritical O (1) models in fractional dimensions, (2) the three-dimensional Gross-Neveu model at both small and large N, and (3) the scalar-tensor model, also in three dimensions.
Borchardt et al. (Thu,) studied this question.
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