Holographic Information Tension: A Non-Perturbative Hydrodynamic Framework for Vacuum Viscosity, Topological Crystallization, and Metabolic Cosmology

We propose a unified framework, Holographic Information Tension (HIT), wherein spacetime emerges as a viscous, Sub-Planckian Information Tension Fluid (SPITF). By identifying the metric tensor with the Fisher Information Matrix of the underlying microstates, we derive the Einstein Field Equations as a hydrodynamic equation of state. We demonstrate that this vacuum fluid necessitates a causal, second-order Israel-Stewart viscous description, saturating the holographic KSS bound. Furthermore, we posit a Landau-Ginzburg phase transition mechanism driven by critical curvature, where the fluid undergoes symmetry breaking into a rigid "Information Crystal," providing a topological derivation for the horizon signature flip (grr → −gtt) via Carter-Quintana relativistic elasticity. Finally, we extend this model to a "Metabolic Universe" formalism, modifying the Friedmann equations with irreversible thermodynamic source terms, and predict a detectable 1/f "Thermodynamic Hiss" in gravitational wave detectors via the Fluctuation-Dissipation Theorem.