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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