Formation and interaction of nondiffracting beams in a photorefractive medium with diffusion nonlinearity

The profiles of (1+1)D soliton-like beams are calculated numerically in a photorefractive medium with diffusion nonlinearity. The features of the propagation of nondiffracting beams are considered and it is shown that their interaction in the medium with diffusion nonlinearity is accompanied by the energy redistribution resulting in the fusion of the beams.