Like the first digital computers, quantum computers offer the possibility of technology exponentially more powerful than current systems. Quantum computers are machines that use the properties of quantum physics to store data and perform computations. This can be extremely advantageous for certain tasks where they could vastly outperform even our best supercomputers. Classical computers, which include smartphones and laptops, encode information in binary “bits” that can either be 0s or 1s. In a quantum computer, the basic unit of memory is a quantum bit or qubit. David Deutsch, at the University of Oxford, described the first universal quantum computer. Just as a Universal Turing machine can simulate any other Turing machine efficiently (Church–Turing thesis), so the universal quantum computer is able to simulate any other quantum computer with at most a polynomial slowdown. Quantum computers are being manufactured and used. But they cannot yet make the large-scale calculations that are expected to be possible in the future. You may be one of those waiting for the quantum computer, the arrival of which we have been told is imminent for several years.
https://prakashastraltech.wordpress.com/2024/03/26/quantum-computer/
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