Variational bound for the energy of two-dimensional quantum antiferromagnet
Condensed Matter
2007-05-23 v1
Abstract
We obtain the variational upper bound for the ground- state energy of two-dimensional antiferromagnetic Heisenberg model on a square lattice at arbitrary value of the anisotropy parameter using the two-dimensional generalization of Jordan-Wigner transformation. Our result can be considered as an upper bound for the perturbation theory series about the Ising limit.
Keywords
Cite
@article{arxiv.cond-mat/9307067,
title = {Variational bound for the energy of two-dimensional quantum antiferromagnet},
author = {A. A. Ovchinnikov},
journal= {arXiv preprint arXiv:cond-mat/9307067},
year = {2007}
}
Comments
7 pages, LaTex, JETP Letters (Pisma v ZhETF) 57 (1993) 796-800