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Re:Open-Source Quantum Development by AlexCoventry on Friday November 05, 2021 @03:52PM (#29124014)
There is hardware which purportedly does a quantum computation, but it's completely useless even as a proof of concept, unless you have a burning need to randomly sample from the distribution it happens to generate.
Re:Open-Source Quantum Development by FartyMcFarter on Saturday November 06, 2021 @06:27AM (#29129040)
> but it's completely useless even as a proof of concept

We might have different definitions of "proof of concept", but I think that's exactly what it was (if you're referring to Google's experiment).

This FAQ explains this quite nicely:

https://scottaaronson.blog/?p=4317

Re:Open-Source Quantum Development by R0b0t1 on Friday November 05, 2021 @07:20PM (#29125777)
An interesting idea is simulating quantum math on real hardware. It's an open question if quantum computing is equivalent to contemporary computing. It seems likely that it is.