MIDIT OFD CATS Modelling, Nonlinear Dynamics Optics and Fluid Dynamics Chaos and Turbulence Studies and Irreversible Thermodynamics Risø National Laboratory Niels Bohr Institute and Technical University of Denmark Building 128 Department of Chemistry Building 321 P.O. Box 49 University of Copenhagen DK-2800 Lyngby DK-4000 Roskilde DK-2100 Copenhagen Ø Denmark Denmark Denmark
Grupo Interdisciplinar de Sistemas Complicados (GISC),
Departamento de Matematicas,
Universidad Carlos III de Madrid,
MIDIT-seminars 490 and 491
Friday, June 8, 2001, 13.00 h and 14.00 h
at IMM, Bldg. 305, Room 018, DTU.
The 2D sine-Gordon model for surface growth: effects of disorder:
In this talk I will briefly review the 2D sine-Gordon model from the viewpoint of modelling surface growth in a generic way. Then I will present results on the effects of considering that the substrate on which the surface grows is disordered, which leads to unexpected and not well understood features of the low temperature phases.
An overview of collective coordinate ideas and techniques for nonlinar coherent excitations:
The collective coordinate technique, first proposed to describe soliton dynamics in the late 70's, has become one of the most widely applied and succesful approaches to treat all kinds of nonlinear coherent excitations, allowing to understand and predict complicated phenomena. This talk is an overview of the main ideas inspiring the approach and different ways it is applied, with some specific examples.