Upcoming Events

Nonlinear Wave-packet Dynamics in a Disordered Medium

March 25, 2013 2:00PM to 3:00PM
Presenter 
Georg Schwiete, Freie Universit├Ąt Berlin
Location 
Building 223, Room S105
Type 
Seminar
Series 
Materials Science Seminar
Abstract:
The propagation of a wave-packet in a nonlinear disordered medium exhibits interesting dynamics. This problem is directly connected to experiments on expanding Bose gases and to studies of transverse localization in nonlinear optical media.

In a nonlinear medium the energy of the wave-packet is stored both in the kinetic and potential parts, and details of its propagation are to a large extent determined by the transfer from one form of energy to the other. In this talk, I will describe an effective theory of pulse propagation in a nonlinear and disordered medium. Based on estimates for the scattering rate, I will then discuss the relevance of the nonlinearity for the localization problem.