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I have a question about D-Wave. I've been trying to follow their progress in building multi-qubit adiabatic quantum computers for years now, and I see Google is

I have a question about D-Wave. I've been trying to follow their progress in building multi-qubit adiabatic quantum computers for years now, and I see Google is working with them now too. But this blog entry states that it's hard to work out if D-Wave's hardware is really a quantum computer. Why is it so hard? I mean after all these years they still can't tell if it's actually working?

gluejar 17y ago
To some extent, everything is a quantum computer; the problem is entering in the program and how accurately you can read out the answer. If I understand correctly, the scientific advance reported is just doing the first part.