DMPQ-What is quantum computing and how they are different from normal computers?

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quantum mechanics to store information in ‘qubits’ instead of the typical ‘bits’ of 1 and 0.  Just as a bit is the basic unit of information in a classical computer, a qubit is the basic unit of information in a quantum computer.  It takes advantage of the strange ability of subatomic particles to exist in more than one state at any time. They can do intensive number-crunching tasks much more efficiently than the fastest comparable computers.

The prospect of using quantum computers to model complicated chemical reactions, a task that conventional supercomputers is not good at.  For instance, to sort a billion numbers, a quantum computer would require 3.5 million fewer steps than a traditional machine, and would find the solution in only 31,623 steps.