Google Just Cut a Major Quantum Computing Error Rate by 40 Times

Google's Willow quantum processor achieved a 40-fold reduction in error rates for magic state production, reaching a fidelity of 99.99%, marking a major hardware milestone in quantum computing. This breakthrough addresses a critical bottleneck since magic states consume up to 95% of quantum computing capacity, enabling potentially smaller and more practical quantum machines.

This Wire brief sits within Fusion42's coverage of Quantum Computing, and 10 sources have reported it between 15 Oct 2026 and 17 Oct 2026.