Aaronson–Ambainis conjecture resolved: no exponential quantum speedup for unstructured problems

fortnow · x · 2026-11-09

Lance Fortnow notes the resolution of the Aaronson–Ambainis conjecture confirms what we've known since the 90s: no exponential quantum advantage for non-structured black-box problems. The new result extends this even to algorithms that only need to be correct on most inputs — a theoretical cooldown on quantum-advantage hype.

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