Quantum Monte Carlo study of the pairing correlation in the Hubbard ladder
Strongly Correlated Electrons
2009-10-28 v1
Abstract
An extensive Quantum Monte Carlo calculation is performed for the two-leg Hubbard ladder model to clarify whether the singlet pairing correlation decays slowly, which is predicted from the weak-coupling theory but controversial from numerical studies. Our result suggests that the discreteness of energy levels in finite systems affects the correlation enormously, where the enhanced pairing correlation is indeed detected if we make the energy levels of the bonding and anti-bonding bands lie close to each other at the Fermi level to mimic the thermodynamic limit.
Keywords
Cite
@article{arxiv.cond-mat/9610038,
title = {Quantum Monte Carlo study of the pairing correlation in the Hubbard ladder},
author = {Kazuhiko Kuroki and Takashi Kimura and Hideo Aoki},
journal= {arXiv preprint arXiv:cond-mat/9610038},
year = {2009}
}
Comments
10 pages, RevTeX, 5 figures in PostScript files