📅 Oct 16, 2026
A 20-year-old bottleneck in quantum computing just fell — and it happened on real hardware.
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For decades, making 'magic states' — the fuel for useful quantum computing — could eat up to 95% of a quantum computer's capacity.
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Google's 'cultivation' method filters noisy states on the Willow chip, slashing errors 40x and hitting a record 99.99% fidelity.
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The idea was proposed in 2024. The team has now proven it works on a physical chip — a result published in Science on October 15.
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Only 8% of attempts pass every check, and scale-up work remains — but the hardest resource problem just got a lot smaller.
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