Two experiments with ultracold fermionic and bosonic atoms in optical superlattices demonstrate the quantized charge transport predicted by Thouless in the 1980s.
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Quantized spin pump on helical edge states of a topological insulator
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Citro, R. A topological charge pump. Nature Phys 12, 288–289 (2016). https://doi.org/10.1038/nphys3649
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DOI: https://doi.org/10.1038/nphys3649
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Quantized spin pump on helical edge states of a topological insulator
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