USP Field Theory — Resonance Entanglement Phase-Locked Origin, Operational Δf Framework, Crystal Geometry, and Experimentally Falsifiable Cutoff Signatures (msf:48820, v4.1)

This document presents a fully operational and experimentally testable formulation of entanglement within USP Field Theory. Entanglement is interpreted not as superluminal interaction, but as persistent correlation inherited from shared resonance boundary conditions established at joint creation. The mechanism is termed phase-lock inheritance: paired photons generated in a common microscopic event inherit compatible oscillatory constraints defined by crystal-supported corridor geometry. Correlation degradation is modeled as interaction-dependent coherence decay, not nonlocal signaling. The framework preserves relativistic causality and explicitly separates pattern correlation from physical propagation. This version upgrades earlier drafts by introducing measurable parameters, falsifiable thresholds, and laboratory-ready protocols. The paper provides: • An operational definition of detuning Δf = |f_pump − f_corr| χ = Δf / f_corr • A working corridor stability scale Δf_max ≈ 10¹⁸ Hz • Explicit mapping between frequency cutoff and visibility collapse • A falsification criterion: If high visibility (V > 0.5, p < 0.01) is observed above 10¹⁹ Hz under comparable corridor control, the cutoff hypothesis must be revised • Coherence decay modeling L_c = c / (Γ_loss + Γ_φ) • Polarization gate behavior C(ψ) = C₀ cos²(ψ − ψ₀) with ψ₀ predicted to correlate with crystal axis orientation • Crystal-lattice hotspot mapping via raster scanning • Defect-correlated suppression tests • Frequency sweep with change-point detection analysis • Explicit clarification that USP reproduces standard Bell-S violations in the low-Δf regime and diverges only near the cutoff scale This formulation retains compatibility with existing low-energy quantum optics experiments while introducing new discriminating predictions at high detuning and high frequency. The framework is experimentally actionable and structured for direct laboratory falsification.