Quantum Computing, Fault Tolerance, Error Correction, Logical Qubits.
logical qubits be practical? In truth, I can’t even realistically speculate since there are so many open questions. But if you press me, I’d suggest maybe five years or even seven years out, with partial implementations in 2–3 years, such as a relatively modest number of qubits — 5, 8, 12, 16, 20,