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Type: Artigo de periódico
Title: Damped Rabi wavepacket oscillations and damping time in correlated random ladders
Author: Caetano, RA
Lyra, ML
Schulz, PA
Abstract: In this work, we follow the time evolution of an initially localized one-electron wavepacket in a random ladder model with correlated diagonal disorder. Weak localization of the eigenstates is anticipated for antisymmetric cross-correlations with every base pair having the same average energy. We show that the wavepacket width develops damped Rabi-like oscillations after reaching the ladder's borders. The Rabi-like oscillations are shown to originate from the interference between neighboring energy eigenstates, while its damping is associated with a destructive interference due to the random scattering in the underlying random potential. The typical damping time t(d) is estimated as a function of the ladder size N and shown to increase as t(d)proportional to N-z with z = 0.62(4). The strong localization in the absence of antisymmetric cross-correlations suppresses the oscillations. (c) 2013 Elsevier B.V. All rights reserved.
Subject: Anderson localization
Correlated disorder
Wavepacket dynamics
Quantum wire
Country: Holanda
Editor: Elsevier Science Bv
Citation: Physica E-low-dimensional Systems & Nanostructures. Elsevier Science Bv, v. 54, n. 157, n. 161, 2013.
Rights: fechado
Identifier DOI: 10.1016/j.physe.2013.06.017
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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