USP Field Theory — Resonance Entanglement Phase-Locked Origin, Crystal-Supported Coherence, Δf Cutoffs, and Experimental Signatures ( msf:48820 )

This paper presents a unified, protocol-complete formulation of entanglement within USP Field Theory. Entanglement is treated not as superluminal interaction, but as a persistence of correlation inherited from shared resonance boundary conditions at the moment of joint creation. The core mechanism is phase-lock inheritance: pairs produced in the same microscopic event inherit compatible oscillatory constraints. Correlation weakens with distance and interaction through corridor distortion (decoherence), without any faster-than-light transfer of energy, force, or information. The work provides: an atomic-scale grounding using spin-loop resonators, re-emission as tension-correction rather than reflection, crystals as coherence platforms enforcing lattice symmetry, material-dependent Δf limits with a working cutoff Δfₘₐₓ ≈ 10¹⁸ Hz, a falsifiable prediction of suppressed gamma-band entanglement, position-dependent coherence hotspots (2–5 Å scale), polarization-based symmetry gates (cos²ψ behavior), and a lab-ready protocol suite including raster scanning, polarization rotation, and frequency-cutoff tests. The formulation preserves relativistic causality and cleanly separates pattern correlation from physical propagation, while remaining experimentally testable.