Geometric Phase Transition in the Dark Sector: A Unified Conceptual Framework for Dark Matter and Dark Energy via Vacuum Strain Dynamics

The standard ΛCDM model treats Dark Matter (DM) and Dark Energy (DE) as distinct, unrelated components, leading to persistent fine-tuning and coincidence problems. This paper proposes a unified conceptual framework where DM and DE are not separate substances, but rather different phase states of the same underlying vacuum energy, governed by local spacetime geometry. We hypothesize that Dark Matter is a stable phase of vacuum energy existing only under specific conditions of tensile strain (stretch), while Dark Energy represents the relaxed state. The conversion mechanism is driven by a two-phase pumping process. An initial Primordial Pump, driven by Big Bang pressure waves (Baryon Acoustic Oscillations), created the seed Dark Matter distribution in the earlyuniverse. As cosmic expansion diluted background strain, a sustained Galactic Pump, driven by chaotic galactic dynamics (rotation, wobble, orbital motion, interactions), took over to maintain the Dark Sector cycle locally. A hysteresis effect prevents rapid flickering between states, ensuring halo coherence. Crucially, this model posits that gravitational coupling is not required for the conversion process; stability is purely geometric. Dark Matter exists only where vacuum strain exceeds a critical threshold; outside this region, it decays back into Dark Energy. This dynamic flow explains late-time cosmic acceleration, the localization of Dark Matter around structures, and predicts observable signatures in void thermodynamics, halo structure, and galactic spin correlations. This work is presented as a conceptual foundation inviting mathematical formalization and observational testing.