Google Willow Cuts Magic-State Errors 40-Fold

Google Quantum AI said its Willow processor demonstrated "magic state cultivation," reducing preparation errors about 40-fold versus uncultivated states. The experiment reached roughly 99.99% magic-state fidelity while retaining only 8% of preparation attempts. The research was published in Science.

• Magic-state preparation errors cut about 40-fold
• Magic-state fidelity reached roughly 99.99%
• Only 8% of preparation attempts were retained
• Magic-state prep could consume up to 95% of a quantum computer's capacity