Mind This Useful Truth About Quantum Advantage
Quantum computers aren’t faster. But they ask better questions
The biggest mistake people make about quantum computing is thinking it wins by doing many calculations at once. That idea sounds natural, but it points you in the wrong direction from the start.
Speed is not the core issue. Even with unlimited classical hardware, each classical query still gives you one local answer tied to one input. Running many queries in parallel only gives you many separate facts faster. It does not change what a single answer can reveal.
Quantum algorithms break this limit in a different way. They reshape the question so that, before you read any output, irrelevant information cancels out and only a global property remains. The advantage comes from interference filtering information, not from hidden parallel work.
If an algorithm’s explanation relies on “many computations happening at once,” it is probably wrong.
Yes, I find that, too often, there is the misconception that quantum wins by going through every combination at once and therefore requiring massive parallelism. where in reality it is about interference! Well done for tackling this!