Google Quantum AI Achieves Magic State Cultivation Breakthrough on Willow Processor

Google CEO Sundar Pichai says the team demonstrated magic state cultivation on physical hardware for the first time. He reports a 40-fold error reduction on Willow versus previous methods and 99.99% logical fidelity, calling it another step toward useful, error-corrected quantum computers. He says the result was published in Science on October 15, 2026.