We put forward properties of solitons supported by optical lattices featuring topological dislocations and show that solitons experience attractive and repulsive forces around the dislocations. Suitable arrangements of dislocations are even found to form soliton traps, and the properties of such solitons are shown to crucially depend on the trap topology. The uncovered phenomenon opens a new concept for soliton control and manipulation, e.g., in disk-shaped Bose-Einstein condensates.
Kartashov, Y.V., Vysloukh, V.A., Torner, L. Topological dragging of solitons. "Physical review letters", Desembre 2005, vol. 95, p. 43902-43905.