Localized annular activity in a disk-confined active polar fluid drives +1 defects on circular trajectories whose speed and radius depend on boundary orientation, and a PI controller enables guiding them along arbitrary paths.
The initial conditions forpare obtained by fixing the position of the defect at somer̸= 0 and minimizing the elastic energyF, Fig
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Spatiotemporal Control of Charge +1 Topological Defects in Polar Active Matter
Localized annular activity in a disk-confined active polar fluid drives +1 defects on circular trajectories whose speed and radius depend on boundary orientation, and a PI controller enables guiding them along arbitrary paths.