Dynamics in one-dimensional spin systems - Density matrix renormalization group study

被引：8

作者：

Nishimoto, S. ^{[1
]}

Arikawa, M. ^{[1
]}

机构：

[1] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2007年 / 21卷 / 13-14期

关键词：

dynamical spin structure factor; heisenberg model; DDMRG; bethe ansatz; magnetic field;

D O I：

10.1142/S0217979207043646

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We study the one-dimensional S = 1/2 Heisenberg model with an uniform and a staggered magnetic fields, using the dynamical density-matrix renormalization group (DDMRG) technique. The DDMRG enables us to investigate the dynamical properties of chain with lengths up to a few hundreds, and the results axe numerically exact in the same sense as 'exact diagonalization' results are. Thus, we can analyze the low-energy spectrum almost in the thermodynamic limit. In this work, we calculate the dynamical spin structure factor and demonstrate the performance of the DDMRG method applying the open-end boundary conditions as well as the periodic boundary conditions.

引用

页码：2262 / 2272

页数：11

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