Phase 0.9 Final Report: Spectral Scaling Laws and Substrate Saturation in FRCFD\
Phase 0.9 Final Report: Spectral Scaling Laws and Substrate Saturation in FRCFD\
\Technical Abstract\
\This document formalizes the results of the Phase 0.9 Scaling Sweep, a rigorous metrological characterization of the fundamental frequency redshift observed in the Finite-Response Coupled Field Dynamics (FRCFD) framework. By mapping the spectral response across a mass range of 60 M(solar) to 520 M(solar), we have established a calibrated Scaling Law that defines the non-linear "lugging" effect of the substrate under varying gravitational stress. The analysis confirms a model-dependent divergence at high mass scales, providing a specific, falsifiable observational envelope for future gravitational wave ringdown analysis.\
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I. The Master Scaling Equation\
\The transition from a linear response to a saturated state is governed by the substrate's finite capacity to propagate field perturbations. At the LIGO-scale baseline (M = 60), the model predicts a conservative redshift of approximately 4.6%. As mass density increases, the field equation for the frequency shift Δf exhibits a non-linear decay characteristic of a high-viscosity medium:\
\∂²Ψ/∂t² − v² ∇²Ψ + μΨ + λ|Ψ|²Ψ = κ S Ψ \
\Where Ψ represents the coupled field potential, v is the propagation velocity within the substrate, and κ is the coupling constant defining the "congestion" per unit mass S. The observed frequency f\_0 is a direct function of the temporal latency induced by the term κ S Ψ, leading to a measurable "clock-slowing" in the ringdown phase.\
\II. Empirical Rung Analysis\
\The Phase 0.9 sweep utilized two distinct mathematical escapements—the \Rational\ and \Power-Law\ models—to bracket the uncertainty of the substrate's stiffness. The results are categorized into three distinct regimes:\
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- \The Linear Regime (M = 60–80):\ The envelope remains tightly bound (Width ≈ 1.3%). Both models converge on a redshift between 4.6% and 6.8%, suggesting that at current observational sensitivities, the choice of saturation model is second-order to the existence of the shift itself.\ \
- \The Transitional Regime (M = 240):\ Model sensitivity emerges as a primary driver. The Rational model exhibits "Stiff" behavior (-12.4%), while the Power-Law model enters an accelerated decay (-22.8%), opening a 10.4% divergence envelope.\ \
- \The Extreme/Asymptotic Regime (M = 520):\ We observe the "Saturation Brake." The Rational model begins to plateau near -17.3%, representing the maximum congestion limit of the substrate. Conversely, the Power-Law model reaches a high-stress temporal lag of -32.7%.\ \
III. Tabulated Spectral Records\
\| Mass (M\_solar)\ | \Model\ | \f\_0 (Hz)\ | \Shift (%)\ | \
|---|---|---|---|
| 60\ | \Rational\ | \238.6\ | \-4.64%\ | \
| 80\ | \Rational\ | \236.4\ | \-5.51%\ | \
| 80\ | \Power-Law\ | \233.1\ | \-6.83%\ | \
| 240\ | \Rational\ | \219.1\ | \-12.43%\ | \
| 240\ | \Power-Law\ | \193.1\ | \-22.82%\ | \
| 520\ | \Rational\ | \206.8\ | \-17.35%\ | \
| 520\ | \Power-Law\ | \168.4\ | \-32.69%\ | \
IV. Physical Interpretation\
\The divergence in the high-mass regime suggests that the substrate behaves as a \Finite-Response Substrate (FRS)\. As mass density approaches the congestion threshold, the field stiffness λ|Ψ|²Ψ provides a counter-pressure to infinite temporal slowing. In the Rational model, this results in a stable, observable plateau. In the Power-Law model, the substrate exhibits localized softening, leading to a deeper redshift that could serve as a unique signature for intermediate-mass black holes (IMBH). These findings provide the foundational data necessary for the transition to Phase 1.0: Observational Verification.\
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