Google Quantum AI demonstrates 'magic state cultivation' on physical hardware

Google CEO Sundar Pichai says the Google Quantum AI team demonstrated 'magic state cultivation' on physical hardware for the first time. He reports a 40x error reduction on its Willow processor compared with previous methods and 99.99% logical fidelity. Pichai says the result was published in Science on October 15, 2026, and calls it a step toward useful, error-corrected quantum computers.