Density matrix numerical renormalization group for non-Abelian symmetries

Article

关键词: KONDO PROBLEM;    TRANSPORT-COEFFICIENTS;    ANDERSON MODEL;    FIELD-THEORY;   

DOI  :  10.1103/PhysRevB.78.245109

来源: SCIE

【 摘 要 】

We generalize the spectral sum rule preserving density matrix numerical renormalization group (DM-NRG) method in such a way that it can make use of an arbitrary number of not necessarily Abelian local symmetries present in the quantum impurity system. We illustrate the benefits of using non-Abelian symmetries by the example of calculations for the T matrix of the two-channel Kondo model in the presence of magnetic field, for which conventional NRG methods produce large errors and/or take a long run-time.

【 授权许可】

Free