A Quantum computing is a computer design which uses the principles of quantum physics to increase the computational power beyond what is attainable by a traditional computer. These computers have been built on the small scale and word continues to upgrade them to more practical models.
It would store information as a 1, 0 or a quantum superposition of the two stats. Such as ‘quantum bit’, called a qu-bit, allows for far greater flexibility than the binary system.
Quantum computer would be able to perform calculation on far greater order of magnitude than traditional computer.