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The term “quantum advantage” is used to describe how a quantum computer may be able to outperform a classical computer. Quantum advantage serves as a kind of conceptual example of how much better quantum computers can be at various tasks and processes, and why quantum computing should be pursued as a frontier of IT.
Techopedia Explains Quantum Advantage
Experts point out that quantum advantage is in some ways synonymous with the term “quantum supremacy.”
Sometimes the two are used interchangeably, but while quantum advantage implies that a quantum computer can perform a test better than any classical computer, quantum supremacy often implies that the that no classical computer can do the work of the quantum computer at all within a set of reasonable parameters.
As Jack Krupansky writes in Medium: “ The central essence of quantum advantage is quantum parallelism which enables quantum algorithms to execute with a computational complexity which is polynomial in contrast with classical algorithms which tend to have a greater (worse) computational complexity which is superpolynomial, such as exponential.” Part of the essential supremacy of quantum computing relates to the ability of the qubit, the fundamental increment, to have an undetermined value.
