Researchers have shown that it is possible to control the coupling between two quantum dots in a semiconducting nanowire, and also to count the charges on these dots with a third quantum dot in a different nanowire.
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Eriksson, M., Friesen, M. Nanowires charge towards integration. Nature Nanotech 2, 595–596 (2007). https://doi.org/10.1038/nnano.2007.314
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DOI: https://doi.org/10.1038/nnano.2007.314
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