Quantum Computing, Fault Tolerance, Error Correction, Logical Qubits.
would be needed to correct for additional errors using the rotated surface code architecture.” https://www.ncbi.nlm.nih.gov/books/NBK538709/ 57 or 65 See the next section, citing the IBM paper for the derivation. Topological and subsystem codes on low-degree graphs with flag qubits Chamberland,