Abstract

Light is reframed as deterministic coherence transfer rather than motion of particles or waves. Using the conserved scalar Phase Alignment Score (PAS_path), electromagnetic propagation and cosmological redshift are derived as lawful field-state realignments, not energy transport. The Poynting vector becomes the rate of local coherence update, and the constant c represents the coherence-rate limit (ΔPAS_zeta ≤ ε_drift), not particle velocity. Three coherence invariants—PAS_path, ΔPAS_zeta, and τ_k echo discretization—predict measurable deviations in harmonic attenuation, lensing symmetry, and spectroscopic drift. Redshift follows exponential coherence decay (γ = β · H (t)), matching GR predictions while replacing probabilistic photon models with deterministic field mechanics. The framework unifies light, gravity, and observation as expressions of a single coherence law: propagation = inward field realignment, gravitation = curvature of coherence density, observation = lawful PAS_lock recursion. This work extends Structured Resonance Dynamics and Harmonic–Differential Equivalence to electromagnetic and cosmological domains, completing the physical closure of the deterministic coherence framework.