title: Interaction of solitons with bond defects in discrete nonlinear Schrödinger chains.
abstract: The interaction of solitons with bond defects in discrete nonlinear Schrödinger (NLS) chains is investigated. A perturbed NLS equation is derived on the basis of a microscopic model. Localized soliton-defect solutions are obtained and their stability is analyzed. Scattering of propagating solitons from bond defects is studied numerically and a variety of scattering patterns is obtained. A phase diagram is constructed showing the corresponding parametric regions.
authors.affiliation: Institute of Solid State Physics, Bulgarian Academy of Sciences, 1784 Sofia, Bulgaria.
authors.forename: M T
authors.initials: MT
authors.lastname: Primatarowa
authors.forename: K T
authors.initials: KT
authors.lastname: Stoychev
authors.forename: R S
authors.initials: RS
authors.lastname: Kamburova