Absence of localization in one-dimensional lattice with off-diagonal nonlinearity disorder

摘要

The time evolution of an initially localized mode in a one-dimensional lattice with off-diagnonal nonlinearlity disorder is studied by solving a modified nonlinear Schrodinger equa- tion. Absence of localization is found when the nonlinearity parameter is beyond the self- behavior region for corresponding periodic lattice. The propagation of electrons shows ballistic behavior even in the presence of disorder. When self-trapping occurs, the untrapped portion still escapes ballistically.