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- W4310632722 abstract "Topological defects play a central role in the physics of many materials, including magnets, superconductors and liquid crystals. In active fluids, defects become autonomous particles that spontaneously propel from internal active stresses and drive chaotic flows stirring the fluid. The intimate connection between defect textures and active flow suggests that properties of active materials can be engineered by controlling defects, but design principles for their spatiotemporal control remain elusive. Here we provide a symmetry-based additive strategy for using elementary activity patterns, as active topological tweezers, to create, move and braid such defects. By combining theory and simulations, we demonstrate how, at the collective level, spatial activity gradients act like electric fields which, when strong enough, induce an inverted topological polarization of defects, akin to an exotic negative susceptibility dielectric. We harness this feature in a dynamic setting to collectively pattern and transport interacting active defects. Our work establishes an additive framework to sculpt flows and manipulate active defects in both space and time, paving the way to design programmable active and living materials for transport, memory and logic." @default.
- W4310632722 created "2022-12-13" @default.
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- W4310632722 date "2022-12-01" @default.
- W4310632722 modified "2023-10-16" @default.
- W4310632722 title "Spatiotemporal control of active topological defects" @default.
- W4310632722 doi "https://doi.org/10.48550/arxiv.2212.00666" @default.
- W4310632722 hasPublicationYear "2022" @default.
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