Dynamics of one electron in a nonlinear disordered chain

被引：13

作者：

de Moura, F. A. B. F. ^{[1
]}

Caetano, R. A. ^{[1
]}

Santos, B. ^{[2
]}

机构：

[1] Univ Fed Alagoas, Inst Fis, BR-57072970 Maceio, AL, Brazil

[2] Observ Nacl, BR-20921400 Rio De Janeiro, RJ, Brazil

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2012年 / 24卷 / 24期

关键词：

ANDERSON LOCALIZATION; TIME EVOLUTION; SOLITONS; ABSENCE; WAVES;

D O I：

10.1088/0953-8984/24/24/245401

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In this paper we report new numerical results on the disordered Schrodinger equation with nonlinear hopping. By using a classical harmonic Hamiltonian and the Su-Schrieffer-Heeger approximation we write an effective Schrodinger equation. This model with off-diagonal nonlinearity allows us to study the interaction of one electron and acoustical phonons. We solve the effective Schrodinger equation with nonlinear hopping for an initially localized wavepacket by using a predictor-corrector Adams-Bashforth-Moulton method. Our results indicate that the nonlinear off-diagonal term can promote a long-time subdiffusive regime similar to that observed in models with diagonal nonlinearity.

引用

页数：5

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