Speaker: JFR Archilla (pdf color 3.3 Mb)
With A Alvarez, J Cuevas and FR Romero

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.

Graduate School in Nonlinear Science at Informatics and Mathematical Modelling
DTU, Denmark. November 13, 2001. Seminar by JFR Archilla.

Physics Faculty, University of Sevilla, Spain. October, 2001. Talk by A Alvarez.