Graduate School in Nonlinear Science

Sponsored by The Danish Research Agency

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


by Juan FR Archilla
Departamento de Fisica Applicada I
ETS de Ingenieria Informatica
Sevilla, Spain

MIDIT-seminar 499

Tuesday, November 13, 2001, 14.00 h
at IMM, Bldg. 305, Room 018, DTU

Abstract: Dark breathers consist of the opposite type of localization than the usual breathers (bright breathers). That is, most of the particles ofa discrete system are oscillating with large amplitude while a few or only one have very small amplitude. The conditions of the theorems that garantee the stability of bright breathers are not fulfilled for the dark ones. However, there is a number of situations where they are stable, which is fully understable in the framework of Aubry's band theory. This opens the possibility of observing them in real systems, like DNA.