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We describe a generic scheme to extract critical exponents of quantum latticemodels from sequences of numerical data which is for example relevant fornon-perturbative linked-cluster expansions (NLCEs) or non-pertubative variantsof continuous unitary transformations (CUTs). The fundamental idea behind ourapproach is a reformulation of the numerical data sequences as a seriesexpansion in a pseudo parameter. This allows to utilize standard seriesexpansion extrapolation techniques to extract critical properties like criticalpoints and critical exponents. The approach is illustrated for thedeconfinement transition of the antiferromagmetic spin 1/2 Heisenberg chain.

Extracting critical exponents for sequences of numerical data via series extrapolation techniques