qubit.
A quantum bit; the basic unit of quantum information described by a superposition of two states; a quantum bit in a quantum computer capable of being in a state of superposition; A binary qudit.
Meaning & usage
A quantum bit; the basic unit of quantum information described by a superposition of two states; a quantum bit in a quantum computer capable of being in a state of superposition; A binary qudit.
Where this word comes from
Blend of quantum + bit, a play on cubit (“historical unit of length”). Coined by American physicist Benjamin Schumacher in 1995.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.