CMG–LCE V8: Testing Dark Energy in Cosmic Voids: A Falsifiable Probe of Vacuum Coherence

DESCRIPTION We present a falsifiable, large-scale observational test of dark energy using cosmic voids, based on the CMG–LCE framework. This work introduces a novel environmental probe of cosmic expansion, testing whether the effective cosmological term may depend on vacuum coherence and large-scale structure environment. Cosmic voids provide a uniquely clean laboratory for probing fundamental cosmology. In this work, we propose and implement a differential observational test targeting potential environmental modulation of cosmic expansion, motivated by the CMG–LCE framework. The core hypothesis is minimal and testable: low-density regions (voids) preserve higher vacuum coherence, potentially leading to measurable deviations in effective expansion observables. To explore this, we develop: • A DESI-like forecast framework with sensitivity at the ~0.5–1.5% level • A fully reproducible Python pipeline (publicly available) • A Monte Carlo validation suite (up to 1000 realizations) • Realistic covariance modeling and binning strategies • DESI-style statistical outputs (error bars, binned signals, significance estimates) This work is explicitly designed as a falsifiability-oriented proposal, not a detection claim. All results are based on realistic mock simulations, providing a transparent and extensible framework ready for: • DESI DR1 data • Euclid-like survey volumes • Cross-correlation with large-scale structure observables Within standard General Relativity, this approach explores an alternative interpretation: effective cosmological behavior emerging from vacuum coherence properties rather than a strictly constant Λ. Key Contributions First void-based test of vacuum coherence effects • Direct connection between environment and effective expansion • Fully reproducible, open scientific pipeline • Clear path toward near-term observational validation