Quantum Computing, Fault Tolerance, Error Correction, Logical Qubits.
9’s) qubit reliability. 0.0001 or 10E-4 or 0.01% — one in ten thousand operations fail. 99.99% (4 9’s) qubit reliability. 0.00001 or 10E-5 or 0.001% — one a hundred thousand operations fail. 99.999% (5 9’s) qubit reliability. 0.000001 or 10E-6 or 0.0001% — one in a million operations fail. 99.9999%