Quantum Computing, Fault Tolerance, Error Correction, Logical Qubits.
(data) qubits. d = 19 — requires 361 physical (data) qubits. d = 25 — requires 625 physical (data) qubits. d = 29 — requires 841 physical (data) qubits. d = 37 — requires 1,369 physical (data) qubits. Fairly low error rate. d = 49 — requires 2,401 physical (data) qubits. Diminishing returns. Is d =