Google's Willow chip hits 99.99% magic-state fidelity, still a million times short of breaking RSA
- —Magic state cultivation cut errors 40-fold on the 105-qubit Willow chip
- —99.99% fidelity means roughly one error per 10,000 operations
- —Factoring RSA-2048 needs error rates near one in 10 billion
- —Google targets post-quantum cryptography readiness by 2029
Why it matters: The quantum threat to Bitcoin remains theoretical: breaking ECDSA would require hundreds of thousands of physical qubits.
Source: Cryptopolitan