High Energy Dynamics of the Single Impurity Anderson Model

TL;DR

This paper investigates the high-energy dynamics of the single impurity Anderson model using dynamic density-matrix renormalization, revealing sharp resonances at high energies that are crucial for understanding dynamic correlations.

Contribution

It introduces a novel analysis of the one-particle Green function with constant energy resolution, highlighting the presence of sharp high-energy resonances.

Findings

Sharp dominant resonances at high energies identified

Resonances are crucial for understanding dynamic correlations

Method provides detailed energy-resolved Green function analysis

Abstract

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.