When Quantum Errors Cascade: Why AI Decoders Are Rewriting the Economics of Fault-Tolerant Computing
Errors are expensive. That is the boring sentence underneath most quantum computing roadmaps. A physical qubit is noisy, so engineers encode one logical qubit into many physical qubits. If the target computation is large enough, the redundancy becomes enormous. Then the spreadsheet starts doing what spreadsheets do best: quietly turning physics into capital expenditure. ...