Fig. 1.

Sketch of a targeted evolution of the pinning landscape. We start with generation 0, which contains a single configuration without defects. Each defect has elliptical shape and is characterized by three independent diameters. The evolution process mutates the pinning landscape by adding/removing, translating, scaling, and reshaping particles. These mutations create the next generation. We accept the pinning landscape with maximal critical current density ($J_{\mathrm{c}}$) and discard all others. The evolution ends at some generation $N$ with configuration having maximal $J_{\mathrm{c}}$ (shown in red).