No, not again. Google is claiming another advantage of its quantum computer, Willow . There is a straightforward test, I came up with, to determine if a quantum computer is functional. People at Google can run this; it's an almost trivial algorithm. 1) X=0, initialize a qubit, gate, or the whole quantum computer to whatever state you like. Hero, zero means an initial state. 2) Determine X, figure out what that state is. 3) Repeat steps 1) and 2) a large number of times, say 1

We are already accustomed to breathtaking revelations from Google's quantum computing team. This is yet another one. Pay attention to the...