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• Physics

# Qubit

A qubit (quantum + bit; pronounced kew-bit) is the quantum state of one unit of quantum information storage. It consists of a superposition of two base states, by convention written $\mid 0$" alt="" /> and $\mid 1$" alt="" /> . A qubit is composed of a linear quantum superposition of these two states. A qubit memory differs significantly from a traditional memory in which a bit can only take the values 0 or 1, one value at a time. A qubit does not have this restriction.

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