Technology
Why haven’t we got useful quantum computers yet?
Four years after Google first demonstrated the supremacy of quantum computers over ordinary ones, why aren't these exotic machines being used for practical problems?
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Four years after Google first demonstrated the supremacy of quantum computers over ordinary ones, why aren't these exotic machines being used for practical problems?
In 2019, Google showed that its Sycamore quantum computer could solve a problem that no ordinary computer could handle - but now a new algorithm gives non-quantum devices the edge