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Where Are the 40-Qubit Algorithms?

I’ve Only Seen One

Thanks to Jack Krupansky for asking the question in the title of this article.

It’s a good question. Personally, I can only remember seeing one: Google’s 53-qubit “quantum supremacy” experiment, and that algorithm has no practical use. Off the top of my head, I also don’t remember if the paper showed the entire 53x20 circuit, or if it was just…