Information is held in Qubits, that means, they can exist in two states at the same time.A qubit can store a 0 and 1 simultaneously, if you build two qubits they can hold four values at once; 11, 10, 01, and 00.So, adding more qubits can greatly increase the computing capability of such a machine.Quantum Computing exploit the properties of quantum mechanics, which is the science that governs how matter behaves on the atomic scale.It looks absurd. A statement that something is both X and non-X at the same time looks absurd. But, having them simultaneously is the essence of Quantum Computing.The idea was first proposed by British Physicist David Deutsch, in 1985.In a quantum computer, a number of elemental particles such as electrons or photons can be used with either their charge or polarization acting as a representation of 0 and/or 1. Each of these particles is known as a quantum bit, or qubit.

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