Main Page | See live article | Alphabetical index A qubit (quantum + bit; pronounced /kyoobit/ [1] ) is a two-state quantum system which is the smallest unit of quantum information. Its two basic states are conventionally labeled |0> and |1> (pronounced: ket 0 and ket 1). A pure qubit state is a linear quantum superposition of those two states. This is significantly different from the state of a classical bit, which can only take value 0 or 1. It is also possible to have a three-state system, called a qutrit, whose states are conventionally labeled |0>, |1> and |2>. See also: quantum computation (A qubit is not to be confused with a cubit, which is an ancient measure of length equal to about 40 or 50cm.) 多个量子位的组合称为量子寄存器 qubit register。量子计算机 通过操作这些量子位进行计算。 Video game A small humanoid that jump from square to square changing its colour. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.