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Google's claim of quantum supremacy has been completely smashed

Google's Sycamore quantum computer was the first to demonstrate quantum supremacy 鈥 solving calculations that would be unfeasible on a classical computer 鈥 but now ordinary machines have pulled ahead again

By Matthew Sparkes

3 July 2024

Google’s Sycamore quantum computer

Peter Kneffel/dpa/Alamy

In 2019, Google claimed that its Sycamore quantum computer could perform calculations that would take even the world’s most powerful classical supercomputer 10,000 years to complete 鈥 but now it seems that a non-quantum computer crunches the numbers several times faster than Google’s machine, and uses less energy doing so.

Quantum computers have the potential to carry out some kinds of calculations vastly more quickly than classical computers, but are still in their infancy. Google announced in 2019 that Sycamore had achieved 聽鈥渜uantum supremacy鈥 鈥 the point at which a quantum computer can…

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