Topological insulators exhibit unidirectional flow of robust electric charge at the edge of the system. Two recent experiments have observed these chiral edge modes in exceptionally controllable settings of ultracold atoms.
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Asteria, L., Ünal, F.N. Ultracold atoms pushed to the edge. Nat. Phys. 20, 1692–1693 (2024). https://doi.org/10.1038/s41567-024-02657-z
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DOI: https://doi.org/10.1038/s41567-024-02657-z
