Biphase Cosmology - An Immiscible Phase-State Framework for Dark Matter, Dark Energy, and Cosmic Void Structure

This document presents a speculative conceptual framework proposing that the observable universe shares its spacetime manifold with a second, phase-shifted material sector. The two sectors are mutually immiscible - analogous to oil and water on a shared substrate - interacting gravitationally but decoupled electromagnetically. This single premise generates hypothetical explanations for dark matter (gravitational signature of the anti-phase sector’s ordinary matter), dark energy (interfacial tension energy at phase boundaries), cosmic void structure (regions dominated by the other phase), void boundary repulsion (surface tension dynamics at the phase interface), the baryon asymmetry problem (antimatter exists in the anti-phase sector), and the observed filamentary topology of the cosmic web (immiscible fluid self-organization). The framework makes specific, testable predictions including curvature-dependent void boundary repulsion, anti-lensing signatures in void interiors, and characteristic void merger dynamics. While speculative and pre-mathematical, the model’s internal consistency and retrodictive power across multiple open cosmological problems warrant formal development.