Quantum Monte Carlo Study of the Hubbard Ladder
Condensed Matter
2007-05-23 v1
Abstract
We present quantum Monte Carlo results for the Hubbard model on a ladder using the re-structuring method which employ eigenstates of two-site system on a rung to construct a complete set. From technical reasons we concentrate on the case in which the hopping along the leg is much less than the hopping on the rung. We observe the ground state of the half-filled system is made of singlet-like states described in this paper and its first excited state contains one triplet rung. When the system is lightly doped states composed of an electron and a hole appear on some rungs. We find very few hole-pairing on the rung upon doping up to the quarter-filled case.
Cite
@article{arxiv.cond-mat/9510039,
title = {Quantum Monte Carlo Study of the Hubbard Ladder},
author = {Yasuko Munehisa},
journal= {arXiv preprint arXiv:cond-mat/9510039},
year = {2007}
}
Comments
13 pages of LaTeX and 4 ps figures