Quantum error correction stories

Oct 15, 2026

Google demonstrates 40x error reduction in quantum magic states on Willow chip

Google Quantum AI announced it experimentally demonstrated 'magic state cultivation' on its Willow processor, achieving approximately 99.99% state fidelity and cutting errors roughly 40-fold. The breakthrough addresses a key bottleneck in practical quantum computing.

Oct 15, 20265 sources

Top claims

▪Project Eleven CEO Alex Pruden stated in October 2026 that Google Quantum AI's magic state cultivation results on its Willow chip validate Google's prior quantum resource assumptions rather than accelerating estimated Q-day timelines
▪During Google Quantum AI's magic state cultivation experiment on the Willow processor, detailed in Science on October 15, approximately 8% of attempts passed error checks, discarding over nine out of every 10 tries
▪Factoring RSA-2048 encryption would require magic states with error rates near one in 10 billion, approximately one million times cleaner than Google Quantum AI's October 2026 magic state cultivation demonstration on its Willow chip

Subtopics

AI compute infrastructure1 Quantum computing1

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