Flag Fault-Tolerant Error Correction for any Stabilizer Code
Flag Fault-Tolerant Error Correction for any Stabilizer Code
Conventional fault-tolerant quantum error-correction schemes require a number of extra qubits that grow linearly with the code’s maximum stabilizer generator weight. For some common distance-three codes, the recent “flag paradigm” uses just two extra qubits. Chamberland and Beverland [Quantum 2, 53 (2018)] provide a framework for flag error correction of …