Properties of the one-dimensional Hubbard model: cellular dynamical mean-field description
Abstract
The one-dimensional half-filled Hubbard model is considered at zero temperature within the cellular dynamical mean-field theory (CDMFT). By the computation of the spectral gap and the energy density with various cluster and bath sizes we examine the accuracy of the CDMFT in a systematic way, which proves the accurate description of the one-dimensional systems by the CDMFT with small clusters. We also calculate the spectral weights in a full range of the momentum for various interaction strengths. The results do not only account for the spin-charge separation, but they also reproduce all the features of the Bethe ansatz dispersions, implying that the CDMFT provides an excellent description of the spectral properties of low-dimensional interacting systems.
Keywords
Cite
@article{arxiv.0911.0751,
title = {Properties of the one-dimensional Hubbard model: cellular dynamical mean-field description},
author = {Ara Go and Gun Sang Jeon},
journal= {arXiv preprint arXiv:0911.0751},
year = {2009}
}
Comments
J. Phys.: Condens. Matter, in press