Topological states of matter offer new opportunities to improve the way we transmit acoustic or optical signals, but existing technologies have proven difficult to scale. The field of active metamaterials may be able to help.
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Alù, A. Topological order gets active. Nature Phys 13, 1038–1039 (2017). https://doi.org/10.1038/nphys4216
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DOI: https://doi.org/10.1038/nphys4216
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