User Manual
Complete manual for QECTOR Decoder v3: installation, license-token configuration (QECTOR_LICENSE, offline Ed25519 verification), decoder selection by code family, Stim/Sinter integration, batch and GPU decoding, and troubleshooting.
| Decoder | Target code | Speed | Accuracy | Tier |
|---|---|---|---|---|
| Blossom (MWPM) | CSS, Surface | Fast (UF pre-match) | Exact optimal | Production |
| Belief-Matching | CSS, Surface | Moderate | High | Production |
| BP-OSD | qLDPC, LDPC | Moderate | Optimal for qLDPC | Production |
| Union-Find | Large surface | Near-linear O(N) | Approximate | Production |
| GPU Batch | Any (batch) | High throughput | Identical to CPU | Production |
| Hybrid / Cascade | Degenerate, mixed | Iterative | High | Research |
| GNN Belief Matcher | Surface, research | Slow (offline) | Neural-enhanced | Research |