Soliton-potential interaction in the nonlinear Klein-Gordon model
  The interaction of solitons with external potentials in nonlinear Klein-Gordon field theory is investigated using an improved model. The presented model has been constructed with a better approximation for adding the potential to the Lagrangian through the metric of background space-time. The results of the model are compared with another model and the differences are discussed. 
Danial Saadatmand, Kurosh Javidan
nlin.PS nucl-th