Wiki on quantum tomography says: "The number of experimental configurations (state preparations and measurements) required for quantum process tomography grows exponentially with the number of constituent particles of a system. Consequently, in general, QPT is an impossible task for large-scale systems." Doesn't this fairly clearly indicate that the chance of building a moderately sized quantum computer is extremely low from the very beginning, since verification of computer hardware is necessary in it's design, manufacture and maintenance?(adsbygoogle = window.adsbygoogle || []).push({});

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# Chance of building practical quantum computers

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