A Quantitative Model for Redshift and Time Dilation from Path-Integrated Substrate Stress
In FRCFD, supernova time dilation arises because light propagates through a finite-response substrate whose local evolution rate is suppressed by stress. This slows not only the frequency of the wave, but the evolution of its entire waveform. As a result, both redshift and time stretching emerge from the same underlying mechanism—cumulative substrate resistance—rather than cosmic expansion.
Finite-Response Coupled Field Dynamics (FRCFD): A Quantitative Model for Redshift and Time Dilation from Path-Integrated Substrate Stress
Table of Contents
- Abstract
- 1. Introduction
- 2. Response-Limited Dynamics
- 3. Minimal Response Function
- 4. Wave Propagation
- 5. Redshift from Path-Integrated Stress
- 6. Time Dilation
- 7. Unified Interpretation
- 8. Stress Field Model
- 9. Cosmological Limit
- 10. Recovery of Known Limits
- 11. Testable Predictions
- 12. Observational Constraints
- 13. Discussion
- 14. Conclusion
Abstract
In Finite-Response Coupled Field Dynamics (FRCFD), supernova time dilation arises because light propagates through a finite-response substrate whose local evolution rate is suppressed by stress. This slows not only the frequency of the wave but the evolution of its entire waveform. As a result, both redshift and temporal stretching emerge from the same underlying mechanism—cumulative substrate resistance—rather than cosmic expansion.
We introduce a bounded stress scalar S(x) and a response function f(S), showing that frequency shift and time dilation follow from path-integrated substrate impedance. In the low-stress limit, the model reproduces standard relativistic behavior. In the general case, it predicts a nonlinear redshift law dependent on the integrated stress along the propagation path, providing a falsifiable alternative to geometric expansion.
1. Introduction
Modern cosmology interprets redshift as a consequence of metric expansion, while relativistic time dilation is treated as a geometric effect. FRCFD proposes a unified alternative: both arise from wave interaction with a finite-capacity substrate whose response is limited by a maximum admissible stress Smax.
The objective is to construct a minimal quantitative model in which:
• Cosmological redshift z • Temporal dilation tobs / temit emerge from the same path-integrated substrate stress.
2. Response-Limited Dynamics
dτ = dt * f( S(x)^2 / Smax^2 ) S(x) = local substrate stress Smax = saturation limit f(S) = response function
Required properties:
f(0) = 1 f(Smax) = 0 f'(S) < 0
3. Minimal Response Function
f(S) = 1 - ( S^2 / Smax^2 )
This choice reproduces Lorentz-type scaling and ensures smooth saturation.
4. Wave Propagation in a Finite-Response Medium
Ψ(t,x) = A(t,x) * exp(i φ(t,x)) ω = ∂φ / ∂t ω_obs = ω_emit * f(S)
5. Redshift from Path-Integrated Stress
1 + z = Π [ 1 / f(S(x)) ] Continuous limit: ln(1 + z) = ∫ α * S(x)^2 dx α ≈ 1 / (2 Smax^2)
6. Time Dilation from the Same Mechanism
t_obs = ∫ f(S(x)) dt t_obs = t_emit * (1 + z)
7. Unified Interpretation
Redshift → phase evolution suppression Time dilation → envelope evolution suppression Both depend on S(x)
8. Stress Field Model
S(x)^2 = S0^2 + Σ [ Ai / ri(x) ]
9. Cosmological Limit
dz/dx = α * S(x)^2 * (1 + z) Solution: 1 + z = exp( α ∫ S(x)^2 dx )
10. Recovery of Known Limits
Low stress: S << Smax → f ≈ 1 Velocity: S^2 / Smax^2 = v^2 / c^2 → γ = 1 / sqrt(1 - v^2/c^2) Gravity: S(r) ∝ GM / r → gravitational time dilation
11. Testable Predictions
• Structure-dependent redshift • Scatter in standard candles • Weak spectral distortions • No requirement for metric expansion
12. Observational Constraints
• Supernova time dilation • CMB blackbody spectrum • BAO structure
13. Discussion
FRCFD reframes cosmological and relativistic effects as consequences of finite response rather than geometric axioms. Unlike classical tired-light models, this framework incorporates nonlinear dynamics, preserves relativistic limits, and links frequency and temporal evolution through a single mechanism.
14. Conclusion
ln(1 + z) = ∫ α S(x)^2 dx t_obs = t_emit (1 + z)
Finite-Response Coupled Field Dynamics replaces geometric expansion with a physically constrained propagation mechanism: the universe does not stretch light — it resists it.