Effectiveness of the syndrome extraction circuit with flag qubits on IBM quantum hardware

Understand

Large scale quantum circuits are required to exploit the advantages of quantum computers.

• Despite significant advancements in quantum hardware, scalability remains a challenge, with errors accumulating as more qubits and gates are added.
• To overcome this limitation, quantum error-correction codes have been introduced.
• Although the success of quantum error correction codes has been demonstrated on superconducting quantum processors and neutral atom-based systems, there have been no experimental reports of error suppression using flag qubits on a quantum processor.