Stochastic gradient approximation method applied to Hubbard model
强关联电子
2007-05-23 v1
摘要
The two-dimensional Hubbard model is studied using the variational quantum Monte Carlo technique with Gutzwiller-type variational wave functions. In addition to the simple one-site correlated Gutzwiller wave function, we use a form with correlation between electrons on nearest- and next-nearest-neighbor sites. We show that the stochastic gradient approximation method suits very well for the optimization of the free parameters of the variational wave functions.
引用
@article{arxiv.cond-mat/0101465,
title = {Stochastic gradient approximation method applied to Hubbard model},
author = {A. Harju},
journal= {arXiv preprint arXiv:cond-mat/0101465},
year = {2007}
}
备注
5 pages, 4 Postscript figures