Numerically exact and approximate determination of energy eigenvalues for antiferromagnetic molecules using irreducible tensor operators and general point-group symmetries
Strongly Correlated Electrons
2009-10-08 v1
Abstract
Numerical exact diagonalization is the ultimate method of choice in order to discuss static, dynamic, and thermodynamic properties of quantum systems. In this article we consider Heisenberg spin-systems and extend the range of applicability of the exact diagonalization method by showing how the irreducible tensor operator technique can be combined with an unrestricted use of general point-group symmetries. We also present ideas how to use spin-rotational and point-group symmetries in order to obtain approximate spectra.
Cite
@article{arxiv.0812.4126,
title = {Numerically exact and approximate determination of energy eigenvalues for antiferromagnetic molecules using irreducible tensor operators and general point-group symmetries},
author = {R. Schnalle and J. Schnack},
journal= {arXiv preprint arXiv:0812.4126},
year = {2009}
}
Comments
10 pages, 11 figures, submitted to Phys. Rev. B