Numerical evaluation of frequency-moment sum rules for dynamical structure factors

被引：6

作者：

Fledderjohann, A ^{[1
]}

Karbach, M ^{[1
]}

Mutter, KH ^{[1
]}

机构：

[1] BERG UNIV GESAMTHSCH WUPPERTAL,DEPT PHYS,D-42097 WUPPERTAL,GERMANY

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.53.11543

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The frequency moments of the zero-temperature dynamical structure factor in the antiferromagnetic Heisenberg model are computed on rings up to 28 sites. Finite-size effects are analyzed and the estimate of the thermodynamical limit is compared with the two-spinon ansatz of Muller and with a modification of this ansatz for the dynamical structure factor.

引用

页码：11543 / 11549

页数：7

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