Let me end by sticking my neck out. If hardware progress continues at the rate we’ve seen for the past year or two, then I find it hard to understand why we won’t have useful fault-tolerant QCs within the next decade. (And now to retreat my neck a bit: the “if” clause in that sentence is important and non-removable!)I think they created one logical qubit that lasts for a millisecond or so. Or something like that, I did not read the details.
I am just passing this prediction along. Seems doubtful to me.
You can use massive redundancy in any analog system but it isn't scalable. QCs are not even possible in theory.
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