Microsoft’s big win in quantum computing was an ‘error’ after all
Locklin explains it best in "Quantum computing as a field is obvious bullshit" [1]:"quantum computing” enthusiasts expect you to overlook the fact that they haven’t a clue as to how to build and manipulate quantum coherent forms of matter necessary to achieve quantum computation.  A quantum computer capable of truly factoring the number 21 is missing in action. In fact, the factoring of the number 15 into 3 and 5 is a bit of a parlour trick, as they design the experiment while knowing the answer, thus leaving out the gates required if we didn’t know how to factor 15. The actual number of gates needed to factor a n-bit number is 72 * n^3; so for 15, it’s 4 bits, 4608 gates; not happening any time soon."[1] https://scottlocklin.wordpress.com/2019/01/15/quantum-comput...