PRA image from V79I0512


Image from "Symmetry, winding number, and topological charge of vortex solitons in discrete-symmetry media" [Miguel-Ángel García-March, Albert Ferrando, Mario Zacarés, Sarira Sahu, and Daniel E. Ceballos-Herrera, Phys. Rev. A 79, 053820 (2009)]

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