; pronounced /kyoobit/  ) 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。
A small humanoid that jump from square to square changing its colour.