Fractal Physis: Structural Decoherence and the Cosmological Basis of Wavefunction Collapse

We propose the first empirically grounded, structure-based model of quantum decoherence, derived from the fractal coherence properties of the Cosmic Microwave Background (CMB). Using wavelet energy scaling on Planck SMICA data, we extract a scale-dependent coherence decay function and map it to physical space via a logarithmic transformation. This function is integrated into a modified Schrödinger framework, introducing decoherence not via stochastic noise or environment tracing, but as a structural constraint. Double-slit simulations under this constraint exhibit smooth, scale-sensitive interference collapse aligned with the CMB's multipole structure, revealing a natural decoherence threshold near ℓ ∼ 4000. These results suggest that the quantum-classical transition may arise not from observers or entanglement, but from a structural boundary condition inherent to the universe itself. This offers a testable, simulation-friendly alternative to interpretation-based decoherence models and suggests a new avenue for reconciling quantum mechanics with general relativity via cosmological structure. v3 update: Data Pipeline Overview, along with all code and instructions, are provided for complete replicability and independent validation. For questions or collaborations, please reach me at: [email protected]