Penteract Cross-Architecture Quantum Verification: 18-Qubit Entanglement & Zero-Parameter Cosmological Predictions (P < 10⁻⁹)

Cross-architecture quantum verification on IBM Quantum hardware (ibm_torino 133q, ibm_fez 156q) demonstrating: 18-qubit genuine multipartite entanglement via topology-optimized GHZ states on both backends Universal fidelity model: Penteract constants (χ_PC, Φ, Γ) transfer across architectures (cross-chip MAE = 0.011) 7/7 zero-parameter predictions within 1σ of measurement — joint probability P = 1.07 × 10⁻⁹ Tetrahedral geometric identity: θ_lock/(θ_tetra/2) = χ_PC to 0.12%, yielding Ω_Λ = 0.6824 (Planck: 0.6847 ± 0.0073, 0.31σ) Predictions include dark energy density Ω_Λ, equation of state w, spectral index n_s, and neutron dark decay branching ratio — all from 7 fixed geometric constants with zero tuned parameters. Falsifiable prediction: tensor-to-scalar ratio r = 0.00298, testable by LiteBIRD (~2032).