Alain Williams writes "The BBC reports that a new academic study has raised doubts about the performance of a commercial quantum computer in certain circumstances. In some tests devised by a team of researchers, the commercial quantum computer has performed no faster than a standard desktop machine. 'The study has been submitted to a journal, but has not yet completed the peer review process to verify the findings. And D-Wave told BBC News the tests set by the scientists were not the kinds of problems where quantum computers offered any advantage over classical types.'"
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