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by SAI_Peregrinus 1590 days ago
> Is there anything even a tiny QC can do better, faster, and cheaper than a classical computer?

That's an area of active research in computational complexity theory. It's not known if the class BQP[1] (bounded-error quantum polynomial time) is equal to P (classical polynomial time). Many people suspect that BQP > P, but it may not be and quantum computers might not have any problems where they're faster than classical computers.

[1] https://en.wikipedia.org/wiki/BQP