Scale-free property and edge state of Wilson's numerical renormalization group

Article

关键词: DENSITY-MATRIX RENORMALIZATION;    DILUTE MAGNETIC-ALLOYS;    SYSTEMS;   

DOI  :  10.1103/PhysRevB.82.144409

来源: SCIE

【 摘 要 】

We discuss the scale-free property of Wilson's numerical renormalization group (NRG) for the Kondo-impurity problem. The single-particle state of the effective Hamiltonian with a cutoff Lambda is described by the wave-packet basis having the scale-free property. The energy scale of the system can be controlled by the lattice translation of the wave-packet basis with no reference of rescaling of the lattice space. We also analyze the role of the Kondo interaction in the context of wave-packet basis and then discuss the scaling and renormalization of the Kondo coupling. In addition, we clarify the role of the edge state in the lowest energy scale of Wilson NRG.

【 授权许可】

Free