Quantum Computing, Nisq, Qubit Fidelity, Quantum Error Correction, Near Perfect Qubits.
Four and three quarters nines of qubit fidelity — 99.9975%. NP5. Five nines of qubit fidelity — 99.999%. NP6. Six nines of qubit fidelity — 99.9999%. NP7. Seven nines of qubit fidelity — 99.99999%. For more on nines of qubit fidelity, read my paper: Nines of Qubit Fidelity