期刊论文详细信息
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