Random phase approximation for the 1D anti-ferromagnetic Heisenberg model
Strongly Correlated Electrons
2009-11-11 v4 Other Condensed Matter
Abstract
The Hartree-Fock-RPA approach is applied to the 1D anti-ferromagnetic Heisenberg model in the Jordan-Wigner representation. Somewhat contrary to expectation, this leads to reasonable results for spectral functions and sum rules in the symmetry unbroken phase. In a preliminary application of Self-Consistent RPA to finite size chains strongly improved results are obtained.
Cite
@article{arxiv.cond-mat/0601264,
title = {Random phase approximation for the 1D anti-ferromagnetic Heisenberg model},
author = {A. Rabhi and P. Schuck and J. Da Providencia},
journal= {arXiv preprint arXiv:cond-mat/0601264},
year = {2009}
}
Comments
13 pages, 8 figures, 1 table