quantum bit

noun
the fundamental unit of information in a quantum computer, capable of existing in two states, 0 or 1, simultaneously or at a different time.
Also called qubit [kyoo-bit] .
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Science Dictionary
quantum bit  
The smallest unit of information in a quantum computer. Unlike bits in classical systems, which are in one of two possible states labelled 1 and 0, a quantum bit exists in a superposition of these two states, settling on one or the other only when a measurement of the state is made. Also called qubit.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The spin of an electron forms a quantum bit, also called a qubit.
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