Dynamic Density-Matrix Renormalization for the Symmetric Single Impurity Anderson Model

Robert Peters

Hermann Freire, Eberth de Almeida Correa

Satoshi Nishimoto, Eric Jeckelmann

A dynamic density-matrix renormalization group approach to the spectral properties of quantum impurity problems is presented. The method is demonstrated on the spectral density of the flat-band symmetric single-impurity Anderson model. We show that this approach provides the impurity spectral density for all frequencies and coupling strengths. In particular, Hubbard satellites at high energy can be obtained with a good resolution. The main difficulties are the necessary discretization of the host band hybridized with the impurity and the resolution of sharp spectral features such as the Abrikosov–Suhl resonance.

M. Guerrero

Carsten Raas, Götz Silvester Uhrig, Frithjof B. Anders

The quantitative control of the dynamic correlations of single impurity Anderson models is essential in several very active fields. We analyze the one-particle Green function with a constant energy resolution by dynamic density-matrix renormalization. In contrast to other approaches, sharp dominant resonances at high energies are found. Their origin and importance are discussed.

Ulrich Schollwöck