Quantum Error Correction Hits a Number That Actually Matters

Past the threshold

Quantum computing has long been haunted by errors. Qubits are fragile, and noise corrupts calculations faster than they can complete. This week's result shows error rates dropping as systems scale — the opposite of what plagued earlier machines.

Why this is different

Crossing the error-correction threshold means adding more physical qubits now reduces logical errors instead of multiplying them. It's the difference between a science experiment and an engineering roadmap.

The honest timeline