Error‑Disturbance Bounds Enable Causal Joint Nonlocal Measurements in Quantum Field Theory — E8 Intelligence Research

FINDING: Joint nonlocal measurements in QFT are achievable but obey error‑disturbance trade‑offs that preserve causality | MATH: ε(A) η(B) ≥ ħ⁄2 |⟨[A,B]⟩| (Heisenberg‑type inequality) and [M_A(x), M_B(y)]=0 for spacelike‑separated regions (no‑signaling condition) | CONNECTION: No explicit link to golden‑ratio, base‑60, or crystallographic ratios found in the supplied sources | DEPTH: 7 Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com