Quantum Information Protection Scheme Based on Reinforcement Learning for Periodic Surface Codes

Figure 8

Using the MWPM decoder with a threshold of 0.0085 (indicated by light blue bars) and the CNN decoder (indicated by dark blue bars) as training models, the fidelity at quantum bits of 3, 6, 9, 12, 15, 18, and 21 and the fidelity difference curves are determined.