D. Neshev, A. Dreischuh, M. Assa, S. Dinev
Vortex motion in ordered structures is analysed numerically in the frame of the 2D nonlinear Schrödinger equation. Analogies with superfluid dynamics are presented. It was found that coherent interaction of optical vortex solitons (OVSs) leads to vortex motion, which can be adequately described by the Kelvin law in superfluid dynamics for large offsets between the OVSs. Cancelation of motion in some spatial configurations of vortices and vortex lattices is observed. The possibility to steer the motion of vortex ensembles is discussed.