Technical Note SLM_TN-2026-002: Non-Classical Spectral Shifts in SFQED via Metric Latency.

 Technical Note SLM-TN-2026-002 provides a topological resolution to spectral 
residuals in Strong-Field QED (SFQED) experiments, specifically the unexplained redshifts 
at Compton edges observed in high-intensity laser-electron interactions. This paper 
introduces the Metric Latency (𝜏Φ) framework within the Symmetric Layered Model (SLM). 
We propose that observed spectral 'noise' is a manifestation of Tether-Lag—a restorative 
force occurring when sub-femtosecond momentum transfer outpaces the finite coupling 
rate of the inter-sector portal. This version generalizes the 2026 E-320 spectroscopic 
analysis into a formal scaling law, replacing preliminary numerical constants with 
proprietary universal variables (Ω𝜋,). This methodology establishes a new diagnostic for 
vacuum-coupled energy sinks and non-classical metric impedance."