Researchers claim a major quantum computing breakthrough by proving the answer was correct

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Highly anticipated: IBM and researchers at the University of Chicago say they have reached a key milestone in quantum computing: running a computation that appears to be beyond the reach of classical machines while also providing evidence that the result is correct. The work addresses a problem that has lingered in the field for years. It is not enough for a quantum computer to produce an answer that is difficult for classical systems to replicate; researchers also need a way to verify that the answer is accurate.

Until now, most experiments have relied on random circuit sampling, a benchmark designed to produce outputs that are difficult for classical computers to simulate. The issueis that as those computations become more complex, verifying the results becomes nearly impossible without making assumptions about the quantum...

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