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Google announced that it has successfully assembled 70 qubits, a significant increase compared to the 53 qubits found in a device from 2019. This advancement has enabled the company to achieve a groundbreaking level of quantum supremacy over contemporary supercomputers relying on CPUs and GPUs. While the most powerful HPC system available today (Frontier) could match a calculation made by the previous quantum device in 6.18 seconds, Google said it would take the same machine 47.2 years to match the power of the 70-qubit system.
Google's next-gen quantum computer is 241 million times more powerful than the 2019 device. It is also more powerful than recent quantum demonstrations from Chinese researchers, and it should put an end to the quantum supremacy controversy as it is "firmly in the regime of beyond-classical quantum computation."
Steve Brierley, CEO at a company interested in the potential business side of quantum computing (Riverlane), welcomed Google's self-promoted breakthrough as a "major milestone" for quantum supremacy. Sebastian Weidt, CEO of quantum startup Universal Quantum, said that quantum computers still need to demonstrate more practical functions. It's a "very nice demonstration of quantum advantage," Weidt said, but the algorithm described by Google researchers "does not really have real world practical applications" yet.
