# Google demonstrates magic-state cultivation on its Willow processor

> Google Quantum AI said it demonstrated magic-state cultivation on its Willow processor, reducing errors by about 40 times compared with uncultivated states.

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- Section: Technology
- Country: United States
- Published: 2026-10-16T10:36:24+00:00
- Updated: 2026-10-16T10:36:24+00:00
- Event / data period: 2026-10-15
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Google Quantum AI said on 15 October that it had demonstrated magic-state cultivation on its Willow quantum processor, reducing errors by about 40 times compared with uncultivated states. The company reported a logical fidelity of 99.99% for the resulting T-states.

Magic states are resources used to perform operations required for universal quantum computing, and producing them can consume substantial computing capacity. The work was published in Science. Google said the method still needs to be demonstrated at larger scale and that technical challenges remain before practical quantum computing.

## Data

### Results reported by the source

Measurements in Google Quantum AI's announcement dated 15 October 2026.

Methodology: Reports the experimental comparison and logical-fidelity value stated by the source; these are not independent measurements.

| date | label | description | status |
|---|---|---|---|
| 2026-10-15 | Magic-state cultivation on Willow | About 40-fold error reduction versus uncultivated states; 99.99% logical fidelity in T-states. | occurred |

Sources: <https://blog.google/innovation-and-ai/models-and-research/quantum-computing/magic-state-cultivation-quantum-computing/> · Download data: [JSON](https://newsverum.com/api/v1/articles/google-quantum-magic-state-cultivation-40-fold-error-reduction/data/source-record?lang=en&format=json) · [CSV](https://newsverum.com/api/v1/articles/google-quantum-magic-state-cultivation-40-fold-error-reduction/data/source-record?lang=en&format=csv)

## Sources

- [Google Quantum AI](<https://blog.google/innovation-and-ai/models-and-research/quantum-computing/magic-state-cultivation-quantum-computing/>) (Source checked: 2026-10-16; Published: 2026-10-15)

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