Novel Extrapolation for Strong Coupling Expansions
Strongly Correlated Electrons
2007-05-23 v1
Abstract
We present a novel extrapolation scheme for high order series expansions. The idea is to express the series, obtained in orders of an external variable, in terms of an internal parameter of the system. Here we apply this method to the 1-triplet dispersion in an antiferromagnetic Heisenberg ladder. By the use of the internal parameter the accuracy of the truncated series is enhanced tremendously.
Keywords
Cite
@article{arxiv.cond-mat/0208358,
title = {Novel Extrapolation for Strong Coupling Expansions},
author = {K. P. Schmidt and C. Knetter and G. S. Uhrig},
journal= {arXiv preprint arXiv:cond-mat/0208358},
year = {2007}
}
Comments
4 pages, 2 figures, submitted to the proceedings of the International Conference on Strongly Correlated Electron Systems SCES'02 (10-13 July, 2002, Krakow, Poland)