Dynamical behavior of the random-bond transverse Ising model with four-spin interactions

被引：15

作者：

Boechat, B ^{[1
]}

Cordeiro, C

Florencio, J

Barreto, FCS

Bonfim, OFD

机构：

[1] Univ Fed Fluminense, Inst Fis, BR-24210340 Niteroi, RJ, Brazil

[2] Univ Fed Minas Gerais, Dept Fis, ICEX, BR-30123970 Belo Horizonte, MG, Brazil

[3] Reed Coll, Dept Phys, Portland, OR 97202 USA

来源：

PHYSICAL REVIEW B | 2000年 / 61卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.61.14327

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the time evolution of the one-dimensional random-bond transverse Ising model with four-spin interactions. We calculate the time-dependent correlation function as well as the longitudinal relaxation function of the infinite chain. We analyze how the presence of disorder affect the dynamical behavior of the system in comparison with the pure model. We find that the main effect of disorder is to produce a crossover from a central mode to a collective-mode type of dynamics, as the concentration of weaker bonds is enhanced. Such crossover is also present in the case of an increase in bond dilution.

引用

页码：14327 / 14330

页数：4

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