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A modification introducing a cutoff, dimension shift, lattice, or other regulator so divergent expressions become well-defined before renormalization.
wp-physics-regularizationnlab-physics-regularizationtong-qftEach relation below ends at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
Perturbative and lattice formulations introduce regulators to define intermediate quantities.
The target is a model, idealization, restricted ansatz, approximation scheme, phenomenological fit, or historical representation used for the source system or theory. It need not have a universal small error parameter and is not thereby a controlled limit or effective theory. The edge label and detail must identify the precise status.
wp-physics-regularizationnlab-physics-regularizationwp-physics-quantum_field_theorynlab-physics-quantum_field_theoryEach relation below starts at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
Renormalization relates regulated parameters to finite observables and controlled regulator removal or matching.
The source supplies a substantive formal ingredient, dynamical sector, law, field content, or mechanism of the target theoretical framework.
wp-physics-renormalizationnlab-physics-renormalizationwp-physics-regularizationnlab-physics-regularization