Twisted-order parameter applied to dimerized ladders

被引：11

作者：

Almeida, J. ^{[1
]}

Martin-Delgado, M. A. ^{[1
]}

Sierra, G. ^{[2
]}

机构：

[1] Univ Complutense, Dept Fis Teor 1, E-28040 Madrid, Spain

[2] CSIC UAM, Inst Fis Teor, Madrid, Spain

来源：

JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL | 2008年 / 41卷 / 48期

关键词：

D O I：

10.1088/1751-8113/41/48/485301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We apply the twisted-order parameter (TOP) for dimerized quantum spin ladders to locate the critical points that separate gapped phases representing quantum spin liquids of various types. Using the density matrix renormalization group (DMRG), method, we find that the TOP is a good order parameter for these systems regardless of the number of legs. As a check, we reproduce with the DMRG and periodic boundary conditions the computations previously done with quantum Monte Carlo for one-dimensional S = 1/2, S = 1, S = 3/2 and S = 2 Heisenberg chains with alternating bonds.

引用

页数：10

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