“Accurate Capture of Long-Distance Physics in Ising-Like φ4 Theory Using Functional Renormalization Group’s Derivative Expansion”

https://pubmed.ncbi.nlm.nih.gov/38115505

This study shows that the functional renormalization group’s derivative expansion, a generic approximation scheme, can accurately capture the long-distance physics associated with the proliferation of localized excitations near the lower critical dimension of the Ising-like φ^{4} theory.