SOUL · GENERAL

CudaQBackend

NVIDIA CUDA-Q quantum execution backend — third path in the quantum triad (ibm_fez real QPU · cuda_q GPU/CPU-sim · local_sim legacy). Circuits: QPE α-probe (10q; ⚠ the 'Build 38 α=1/137 detection anchor' it mirrored is RETRACTED 2026-05-15 — DC noise pile-up, no α eigenphase; see QDAY_NONECC_FORENSIC_REANALYSIS), VQE φ-resonance D-05 probe (4q, golden-angle sweep), E8 geodesic walk D-07 bypass (8q, Dynkin-diagram entanglement). Auto-selects nvidia GPU target; qpp-cpu fallback on CPU-only nodes. NIM-native: forward-compatible with NVIDIA quantum cloud. Build 141. (Prior 'Gate 2 / 3.91× substrate ratio' framing depended on the retracted α anchor — treat as unverified.) — ACTIVE (src/cuda_q_backend.py)