Dynamical dimer-dimer correlation functions from exact diagonalization
Strongly Correlated Electrons
2009-10-31 v1
Abstract
A regularization method is presented to deduce dynamic correlation functions from exact diagonalization calculations. It is applied to dimer-dimer correlation functions in quantum spin chains relevant for the description of spin-Peierls systems. Exact results for the XY model are presented. The analysis draws into doubt that the dimer-dimer correlation functions show the same scale invariance as spin-spin correlation functions. The results are applied to describe the quasi-elastic scattering in CuGeO.
Keywords
Cite
@article{arxiv.cond-mat/0006168,
title = {Dynamical dimer-dimer correlation functions from exact diagonalization},
author = {Ralph Werner},
journal= {arXiv preprint arXiv:cond-mat/0006168},
year = {2009}
}
Comments
10 pages revtex, 10 figures