SU(3) Anderson impurity model: A numerical renormalization group approach exploiting non-Abelian symmetries
SU(3) Anderson impurity model: A numerical renormalization group approach exploiting non-Abelian symmetries
We show how the density-matrix numerical renormalization group method can be used in combination with non-Abelian symmetries such as $\text{SU}(N)$. The decomposition of the direct product of two irreducible representations requires the use of a so-called outer multiplicity label. We apply this scheme to the $\text{SU}(3)$ symmetrical Anderson model, for …