Density-matrix renormalization-group study of one-dimensional acoustic phonons

被引：25

作者：

Caron, LG ^{[1
]}

Moukouri, S ^{[1
]}

机构：

[1] UNIV SHERBROOKE, DEPT PHYS, SHERBROOKE, PQ J1K 2R1, CANADA

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.56.R8471

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the application of the density-matrix renormalization group to systems with one-dimensional acoustic phonons. We show how the use of a local oscillator basis circumvents the difficulties with the long-range interactions generated in real space using the normal phonon basis. When applied to a harmonic atomic chain, we find excellent agreement with the exact solution even when using a modest number of oscillator and block states (a few times ten). We discuss the use of this algorithm in more complex cases and point out its value when other techniques are deficient.

引用

页码：R8471 / R8474

页数：4

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