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Tutorial
Qubits
Qubit="quantum"+"bit"
A qubit is exactly what it sounds like: a bit of information represented by
a quantum object, such as a single atom, ion, or photon. Just as a bit is
the basic unit of information in a classical information system, a qubit
is the basic unit of information of a quantum information system. The power
of a qubit is that it is not limited to a value of 0 or 1. It can actually
be in a "superposition" state of any combination of 0 or 1. This
is the difference between a classical and a quantum computer, which theoretically
allows quantum computers to be much more efficient at solving certain types
of problems.
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