Comment on "Accurate ground-state phase diagram of the one-dimensional extended Hubbard model at half filling"

TL;DR

This paper critiques a previous study's DMRG results on the extended Hubbard model, clarifying inaccuracies and defending the original findings on the charge-density-wave phase boundary.

Contribution

It provides a correction and clarification of earlier DMRG results, reaffirming the original phase boundary calculations for the extended Hubbard model.

Findings

Zhang's results are inaccurate

The original DMRG calculations are correct

The criticism against the original work is unfounded

Abstract

In PRB 68, 153101 (2003), Guoping Zhang presented density-matrix renormalization group (DMRG) results which contradict my DMRG calculations and Hirsch's quantum Monte Carlo (QMC) simulations for the charge-density-wave (CDW) phase boundary in the one-dimensional extended Hubbard model at half filling. In this Comment I show that Zhang's results are inaccurate and that his criticism of my work is groundless.