Energy levels in superconducting quantum devices are highly sensitive to charge fluctuations. Generally, this is considered a bug, but new work transforms this sensitivity into the defining feature of a novel device.
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Glazman, L. Leaps of quantum phase. Nature Phys 14, 529–530 (2018). https://doi.org/10.1038/s41567-018-0162-4
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DOI: https://doi.org/10.1038/s41567-018-0162-4