Expansion of a wave-packet in lattices with disorder and nonlinearity
Optics
2013-02-05 v1 Disordered Systems and Neural Networks
Abstract
We show, theoretically and experimentally, the counterintuitive result that an increase of disorder can result in an enhanced spreading of an initially localized excitation. Moreover, we find that adding a focusing nonlinearity facilitates the expansion of the wave-packet even further by increasing its effective size. We find a clear transition between between the regions of enhanced spreading (weak disorder) and localization (strong localization) described by a "diffusion peak".
Cite
@article{arxiv.1205.5457,
title = {Expansion of a wave-packet in lattices with disorder and nonlinearity},
author = {Uta Naether and Santiago Rojas-Rojas and Alejandro J. Martinez and Simon Sützer and Andreas Tünnermann and Stefan Nolte and Mario I. Molina and Rodrigo A. Vicencio and Alexander Szameit},
journal= {arXiv preprint arXiv:1205.5457},
year = {2013}
}