Speaker: F. Palmero (pdf slides 600 kb)
With JFR Archilla, FR Romero and D Hennig.

Abstract: We analize the influence of radial and angular perturbations on the properties of moving polarons in a three-dimensional, semi-classical, tight-binding model for DNA . We found that the mobility induced by angular activation is more robust with respect to parametric disorder, has lower velocity, and the activation energy is higher than in radial movability regime. If we introduce a local inhomogeneity in the chain, in order to study the interaction between the polaron travelling along the homogeneous chain with a different base pair, we observe that only polarons activated by means of angular perturbations can cross the inhomogeneity.

MOBIL. Moving Breathers in Inhomogeneous Lattices. Workshop at Sevilla, 21-22 February 2003.