Properties of large amplitude Langmuir solitons

This numerical study isolates some of the experimentally interesting properties of the large amplitude spatially localized electric fields in the Langmuir frequency range which are described by the nonlinear Schrodinger equation with the full exponential nonlinearity retained. The steady state eigenvalues and wavefunctions are calculated and their properties compared with the small amplitude soliton solutions. A variety of time dependent effects are investigated in both bounded and unbounded geometries. Some of these are: the evolution of initial standing waves; the collisional properties; the pumping of stationary, moving, and colliding solitons by a uniform external electric field.