Eur. Phys. J. B (2014) 87: 289
https://doi.org/10.1140/epjb/e2014-50054-0

Regular Article

An efficient implementation of the hierarchical mean-field theory with large block

Department of Physics, Wuhan University, Wuhan 430072, P.R. China

^a e-mail: qljie@whu.edu.cn

Received: 21 January 2014
Received in final form: 18 April 2014
Published online: 3 December 2014

Abstract

We present an efficient implementation of the hierarchical mean-field theory with large block in quantum spin systems. The wave function is a product of the large block states. Each large block state is a superposition of products of small block states. Our result is very close to that of the hierarchical mean-field in a numerical cost effective way. We test our method on a frustrated spin lattice.