Google Quantum AI reported in a Science paper that the magic state cultivation technique cut errors about 40-fold on its Willow chip, producing magic states with 99.99% fidelity. Magic states are single-use resources needed for useful quantum programs, and some estimates put their creation cost at up to 95% of a quantum computer's capacity. Rather than requiring a dedicated factory, the technique works like a filter on a small patch of the chip, with only about 8% of attempts passing every check. It is one of the methods behind Gidney's 2025 estimate that RSA-2048 encryption could be broken with under a million noisy qubits. The experiment used at most 54 of Willow's 105 qubits, while factoring RSA-2048 would require magic states with errors around one in 10 billion.
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Related tickers and likely impact
GOOGL
▲ Likely positiveAlphabet Inc. (Class A)
Relevance: medium
| Market | US stocks |
|---|---|
| Sector | Communication Services |
| Industry | Interactive Media & Services |
| Market cap | $4.3T |
| Close on 10/15/2026 | 349.22 |
| Change that session | +0.45% |
Impact is scored by AI from the headline and may be wrong. It is not investment advice.
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