Some computing challenges are simply too complex to be solved with classical computing. For a fair number of these problems, quantum computers could come to the rescue.
In a quantum computer, information is manipulated in a fundamentally different way than in a classical computer. Traditional computers operate with bits, which are either zero or one. Operations on these bits are performed sequentially. Quantum computers, in contrast, operate with qubits that are in a superposition of zero or one. In other words, they are zero and one at the same time, each with a particular probability.
Add to this entanglement, which means that qubits talk with each other and act concertedly. As a result, the number of states in a qubit array increases exponentially with the number of qubits. Operations can be performed on all these states simultaneously, resulting in immense parallelization.
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