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On October 18, 2026, Alphabet Inc. announced a significant technological milestone in quantum computing, achieving a 40--fold reduction in quantum error rates through a technique termed "magic state cultivation" on its Willow quantum processor. Detailed in the journal Science, the breakthrough elevates quantum state fidelity to 99.99%. By drastically minimizing the physical hardware overhead required for quantum error correction, the advance substantially lowers capital cost barriers and accelerates commercial deployment timelines for fault--tolerant quantum systems.

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