Google’s qubit rivals: The race to useful quantum computers has begun

Google's sycamore chip

Google’s quantum computing chip

Google

Google’s claim to quantum supremacy is far from the end of the road. The firm has just edged in front, but there are still plenty of chicanes, banks and ditches to halt the competitors in the race to build the first truly useful quantum computer.

As well as Google, research groups at IBM, Intel and Microsoft, as well as a slew of start-ups, are all developing quantum computers. And the competition is heating up. IBM has said that Google’s claims of quantum supremacy aren’t as good as they appear and there …

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