Numerical Renormalization Group for Finite Fermi Systems

TL;DR

This paper introduces a numerical renormalization group method based on Wilson's momentum shell approach for finite Fermi systems, demonstrating its accuracy and potential for broader applications beyond fullerenes.

Contribution

The paper presents a novel numerical renormalization group technique tailored for finite Fermi systems, improving accuracy over existing methods.

Findings

Accurately models small fullerene analogs at moderate interaction strengths.

Outperforms other approximation methods qualitatively.

Potential applicability to a wide range of finite Fermi systems.

Abstract

A numerical renormalization group technique based on Wilson's momentum shell method is presented for interacting, finite fermi systems. Results for small fullerene analogs show that the method is quite accurate to moderate values of $U$, and qualitatively better than other approximation methods. The method has potential applicability far beyond the fullerenes.