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2012
Paper (Preprint, Research Paper, Review Paper, White Paper, etc.)
Titel
Expansion of a wave-packet in lattices with disorder and nonlinearity
Titel Supplements
Published on arXiv
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".
Author(s)