So here's this person who basically says we can call of the whole postquantum thing https://www.quantamagazine.org/gil-kalais-argument-against-quantum-computers-20180207/ … this is far outside my area of expertise, but he doesn't sound like a crank.
"Effectively measuring physical phenomena to 1000+ decimal places is just an engineering problem" is a highly suspect claim.
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There is a hegelian dialectic always present between theorists and experimentalists. It has always been this way. And this is the classic antithesis: Quantum computing will fail.
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If I understand correctly (that's a big if), this is exactly the problem that fault tolerance is attempting to solve.
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