Well, since you mentioned this: would you mind linking me to a single demonstration of it that has been conclusively established as evidence of quantum computing? I've seen lots of D-Wave stuff but to my knowledge the experts don't actually really buy those.
> However the difficulty of scaling quantum computers goes up exponentially with the number of qubits, so we might not achieve enough success to make them practical.
But yes, this is more in line with what I was thinking. Even if it's possible I don't expect it will be practical (hence why I used this word in the earlier comment).
I mean physics is quantum. At least, the interface between our experimental apparatuses and the micro world demonstrates all the expected speedups. Every known experiment backs this up.
http://m.pnas.org/content/114/13/3305.full
Supposedly ~17 qubit devices are on the way. None has demonstrated quantum supremacy, practical or not.
That's exactly what I mean. I haven't seen any evidence of quantum computing being demonstrated. All I know is it's hypothetically possible. I'm not sure what people were downvoting when I said this, I'm just stating a fact. It's not like I wished it wouldn't happen or something.
However the difficulty of scaling quantum computers goes up exponentially with the number of qubits, thus we may not achieve enough success to make them practical.