This paper develops the substrate‑native geometric principles governing gradient‑biased molecular propagation within the MID/QC Framework. Propagation behavior is interpreted as the coordinated motion of molecular structures through coherence gradients, torsillation‑aligned tension channels, and boundary‑shaped geometric pathways. Building on the stabilization principles of Series Paper 4 and the assembly architecture of Paper 3, this work formalizes how molecular motion is guided, accelerated, or constrained by substrate‑level gradient structures. The paper establishes how coherence wells bias propagation direction, how torsillation tension shapes molecular trajectory stability, and how boundary curvature modulates propagation pathways. These principles provide a unified substrate‑native explanation for directed molecular transport, anisotropic propagation, gradient‑aligned reaction pathways, and coherence‑biased structural migration. The work connects molecular‑scale propagation mechanics to downstream engineering domains including materials transport, photonic routing, nanoscale fabrication, and torsillation‑aligned device engineering.
Chadwick Rasque (Fri,) studied this question.