Real-space renormalization group flow in quantum impurity systems: local moment formation and the Kondo screening cloud

Andrew K. Mitchell, Michael Becker, Ralf Bulla

The existence of a length-scale ${\xi }_K\sim 1/T_K$ (with $T_K$ the Kondo temperature) has long been predicted in quantum impurity systems. At low temperatures $T\ll T_K$, the standard…