qubit 
noun Computing
Another term for quantum bit.Ions are arguably the leading candidate for use as qubits in a quantum computer....
- But if quantum theorists are correct, quantum bits, or qubits, will enable more efficient problem solving because a qubit can simultaneously encode both a zero and a one.
- But to perform the logic operations vital to a quantum computer, two qubits have to become entangled.
Origin
1990s: from quantum bit, with punning allusion to cubit.