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

We propose a novel structural model of quantum decoherence based on the fractal coherence properties of the Cosmic Microwave Background (CMB). Using wavelet energy scaling on Planck SMICA data, we extract a scale-dependent coherence function and map it to physical space via a logarithmic transformation. This empirical function is integrated into a modified Schr ̈odinger equation, introducing decoherence as a function of cosmological structure. Simulations of double-slit propagation under this framework reveal coherent-to-incoherent transitions that align with real CMB-derived decoherence boundaries near l ∼ 4000. Our results suggest a cosmologically-grounded, scale-structured foundation for quantum-classical transition, offering a testable alternative to environment-based interpretations of wavefunction collapse. These findings suggest that decoherence may not require observer intervention or external environments but may instead reflect a structural boundary condition inherent to the universe itself. v3 update: Data Pipeline Overview, along with all code and instructions are provided for complete replicability and independent validation.