Quantum Computing, Fault Tolerance, Error Correction, Logical Qubits.
syndrome measurement qubits. Or combined as: Total 3 d² minus 2 d physical qubits per logical qubit. So for d = 5: 5² = 25 data qubits. 2 * 5 * (5 minus 1) = 10 * 4 = 40 flag and syndrome measurement qubits. 25 + 40 = 65 total physical qubits per logical qubit. Or calculate it as: 3 * 5² minus 2 *