Quantum X Labs decoder cuts logical errors 12-13% on Google quantum hardware via NVIDIA CUDA-Q QEC

QXL's decoder integrated with NVIDIA CUDA-Q QEC achieved 12.7% fewer logical errors at distance 3 and 12.1% at distance 5 vs PyMatching on Google's public surface-code dataset. Streaming version showed 6-9% lower error rates. Next step: real-time QEC pipeline with NVQLink.