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Enhanced distribution of a wave-packet in lattices with disorder and nonlinearity

 
: Naether, Uta

:
Postprint (PDF; )

Optics Express 21 (2013), Nr.1, S.927-934
ISSN: 1094-4087
Englisch
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IOF ()

Abstract
We show, numerically and experimentally, that the presence of weak disorder results in an enhanced energy distribution of an initially localized wave-packet, in one- and two-dimensional finite lattices. The addition of a focusing nonlinearity facilitates the spreading effect even further by increasing the wave-packet effective size. We find a clear transition between the regions of enhanced spreading (weak disorder) and localization (strong disorder).

: http://publica.fraunhofer.de/dokumente/N-225743.html