Kondo one-loop RG: scaling equation dJ/d ln(Lambda) = -rho J^2; dynamical scale T_K = Lambda_0 exp(-1/(2 rho J_0))

Kondo one-loop renormalisation-group flow framework. Setup: a magnetic impurity with spin S in a metal of density of states rho couples antiferromagnetically to conduction electrons via the Kondo Hamiltonian H = J * S dot s (Kondo 1964…