Finite-temperature dynamics with the density-matrix renormalization group method

被引：13
|
作者：
Kokalj, J. [2 ]
Prelovsek, P. [1 ,2 ]
机构：
[1] Univ Ljubljana, Fac Math & Phys, SI-1000 Ljubljana, Slovenia
[2] Jozef Stefan Inst, SI-1000 Ljubljana, Slovenia
来源：
PHYSICAL REVIEW B | 2009年 / 80卷 / 20期
关键词：
SYSTEMS; ALGORITHM; CHAIN;
D O I：
10.1103/PhysRevB.80.205117
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present a numerical method for the evaluation of dynamical response functions at finite temperatures in one-dimensional strongly correlated systems. The approach is based on the density-matrix renormalization group method, combined with the finite-temperature Lanczos diagonalization. The feasibility of the method is tested on the example of dynamical spin correlations in the anisotropic Heisenberg chain, in particular, it yields nontrivial results for the critical behavior in the isotropic case.
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页数：5
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