Google Willow Quantum Processor

The 105-qubit superconducting processor completed a random circuit sampling benchmark in five minutes that would take the fastest classical supercomputer approximately 10 septillion years. Willow's defining achievement is the first experimental demonstration of below-threshold quantum error correction: increasing code distance reduced logical error rate by 2.14x per unit increase, reversing a 30-year trend where more qubits meant more errors. Prior to Willow, every quantum processor exhibited opposite behavior—more qubits increased error propagation. The 105-qubit scale is not commercially sufficient, but the error correction scaling unlocks a credible path to fault-tolerant computation. Google published full results in Nature, validated as intractable by independent researchers. Competitive implications extend across cryptography, pharmaceutical simulation, financial optimization, and materials science—domains where quantum advantage over classical approaches is largest.