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Meet ‘qudits’: more complex cousins of qubits boost quantum computing

Working with multi-dimensional entities could make calculations more efficient and reduce errors.
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  1. Davide Castelvecchi
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Quantum computing has so far nearly always involved calculating with qubits — quantum objects that can take the value ‘0’ or ‘1’, like ordinary computer bits, but that can also be in a range of combinations of 0 and 1. Now researchers are producing the first applications of ‘qudits’: units of information that offer combinations of three or more simultaneous states.

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Nature 640, 14-15 (2025)

doi: https://doi.org/10.1038/d41586-025-00939-x

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