Open AccessRenormalized perturbation expansion of asymmetric Anderson model
Author(s) -
Huan Li
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.8052
Subject(s) - physics , renormalization , perturbation (astronomy) , perturbation theory (quantum mechanics) , anderson impurity model , electron , scattering , quantum electrodynamics , conductance , statistical physics , quantum mechanics , condensed matter physics
We generalize Yamadas perturbation theory and develop a renormalized perturbation method to study the asymmetric Anderson model. We obtain the occupancy of the local electrons,the renormalization factor,the renormalized energy level,and the renormalized parameters,which are expanded by the bare parameters. We also calculate the density of states of local electrons and the conductance of impurity scattering. The results coveres the range from weak to strong coupling. We find that the approach we adopted is more convenient than Hewsons renormalization method in studying the asymmetric Anderson model.