A generation-based particle-hole density-matrix renormalization group study of interacting quantum dots

TL;DR

This paper introduces a generation-based PH-DMRG method to improve ground-state energy calculations of interacting quantum dots, demonstrating its effectiveness and potential for large systems and addition spectrum analysis.

Contribution

The paper presents a novel modification of the PH-DMRG method, enhancing accuracy and feasibility for large quantum dot systems.

Findings

Generation-based PH-DMRG improves ground-state energy estimates.

Method is feasible for large quantum dot systems.

Accurate calculation of addition spectrum achieved.

Abstract

The particle-hole version of the density-matrix renormalization-group method (PH-DMRG) is utilized to calculate the ground-state energy of an interacting two-dimensional quantum dot. We show that a modification of the method, termed generation-based PH-DMRG, leads to significant improvement of the results, and discuss its feasibility for the treatment of large systems. As another application we calculate the addition spectrum.