Delocalization of wave packets in disordered nonlinear chains

Details Delocalization of wave packets in disordered nonlinear chains Delocalization of wave packets in disordered nonlinear chains

2009-01-28

arxiv.org/abs/0901.4418v2

Physics

Condensed Matter

Disordered Systems and Neural Networks

14 pages, 9 figures, accepted for publication in Phys. Rev. E

Scientific paper

We consider the spatiotemporal evolution of a wave packet in disordered nonlinear Schr\"odinger and anharmonic oscillator chains. In the absence of nonlinearity all eigenstates are spatially localized with an upper bound on the localization length (Anderson localization). Nonlinear terms in the equations of motion destroy Anderson localization due to nonintegrability and deterministic chaos. At least a finite part of an initially localized wave packet will subdiffusively spread without limits. We analyze the details of this spreading process. We compare the evolution of single site, single mode and general finite size excitations, and study the statistics of detrapping times. We investigate the properties of mode-mode resonances, which are responsible for the incoherent delocalization process.

Affiliated with

Also associated with

No associations

Rating

Delocalization of wave packets in disordered nonlinear chains does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Delocalization of wave packets in disordered nonlinear chains, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Delocalization of wave packets in disordered nonlinear chains will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-344567