A conservation-law-guided scheme classifies local operators by whether their spectral function can concentrate into a zero-momentum pole under coarse-graining, with unprotected operators assigned a vanishing injection term.
Forests & Groves: Minimal Gauge Invariant Classes of Tree Diagrams in Gauge Theories
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We describe the explicit construction of groves, the smallest gauge invariant classes of tree Feynman diagrams in gauge theories
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Coarse-Graining and the Classification of Long-Range Correlations in Quantum Field Theory
A conservation-law-guided scheme classifies local operators by whether their spectral function can concentrate into a zero-momentum pole under coarse-graining, with unprotected operators assigned a vanishing injection term.