A Unified Model of the Dark Sector via Quantum Decoherence and Vacuum Phase Transition Processes

The prolonged failure in detecting Dark Matter candidates, such as WIMPs, necessitates a fundamental revision of the standard cosmological model (ΛCDM). This paper proposes a new phenomenological framework that interprets Dark Matter and Dark Energy not as independent unknown entities, but as the results of ‘Quantum Decoherence and Particle Realization processes’ of Vacuum Energy, catalyzed by Baryonic matter and Photons.The core of this model is the postulation that gravity is not an intrinsic property of fixed particles, but a dynamical manifestation occurring during the ‘Event’ where vacuum wave functions transition into a particle state through interaction. By integrating these one-time rendering processes with a Pair-Annihilation mechanism, we demonstrate that the universe naturally reaches a Dynamic Equilibrium state of 27% density without external intervention.Furthermore, we derive the critical acceleration (a0 ≈ c · H0/2π) for dark matter onset directly from the Hubble constant (H0), effectively linking galactic dynamics with global cosmic expansion.This model provides a unified explanation for flat rotation curves, the Tully-Fisher relation, the lensing offset in the Bullet Cluster, and the formation of the third acoustic peak in the Cosmic Microwave Background (CMB) through photon trapping—all without the introduction of new particles.