COUPLED-CLUSTER METHOD FOR QUANTUM LATTICES - APPLICATION TO SQUARE S=1/2 HEISENBERG ANTIFERROMAGNETS

被引：18
|
作者：
HARRIS, FE
机构：
[1] Department of Chemistry, University of Utah, Salt Lake City
来源：
PHYSICAL REVIEW B | 1993年 / 47卷 / 13期
关键词：
D O I：
10.1103/PhysRevB.47.7903
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A coupled-cluster formalism similar to that used in electronic-structure theory is developed for quantum-mechanical systems localized to sites on a lattice. It is shown how diagrammatic methods may be used to represent the cluster contributions in a convenient and systematic manner. The formalism is applied to the square S = 1/2 Heisenberg antiferromagnet, yielding with minor computational effort results of quality comparable to those from computationally intensive quantum Monte Carlo calculations.
引用
收藏
页码：7903 / 7909
页数：7
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