title: Interactions of parametrically driven dark solitons. II. Néel-Bloch interactions.
abstract: The interaction between a Bloch and a Néel wall in the parametrically driven nonlinear Schrödinger equation is studied by following the dissociation of their unstable bound state. Mathematically, the analysis focuses on the splitting of a fourfold zero eigenvalue associated with a pair of infinitely separated Bloch and Néel walls. It is shown that a Bloch and a Néel wall interact as two classical particles, one with positive and the other one with negative mass.
authors.affiliation: Department of Physics, University of Bayreuth, D-95440 Bayreuth, Germany. Igor.Barashenkov@uct.ac.za
authors.forename: I V
authors.initials: IV
authors.lastname: Barashenkov
authors.forename: S R
authors.initials: SR
authors.lastname: Woodford