Google Cracks Quantum's Hardest Problem With 40x Error Cut
Google Quantum AI has demonstrated the first physical-hardware implementation of “magic state cultivation” on its Willow superconducting quantum processor, cutting errors 40-fold and producing states with a record 99.99% logical fidelity, per Google’s official blog. The result — published in Science on October 15, 2026 — tackles a bottleneck that Google says could have consumed up to 95% of a quantum computer’s capacity under old methods. Sources: Google Quantum AI blog, The Quantum Insider, Business Today, October 15-16, 2026. ...