Dissipative Quantum Gravity: Foundations, Stability, and Emergent Spacetime Architecture

Contraction of the complex Quantum Geometric Tensor across an 8D bipartite Hilbert space H₈ = HNH ⊗ HHerm constructs a four-dimensional manifold with dynamic $(-,+,+,+)$ Lorentzian metric signature. Near the second-order Exceptional Point boundary u → 1⁺, physical coordinate time scales logarithmically, shifting the initial cosmological boundary to past infinity (t → -∞) and guaranteeing geodesic completeness (s → -∞) while maintaining a bounded Kretschmann curvature scalar K = 12/P⁴. Temporal kinetic matrix evaluation for scalar doublet perturbations establishes the strict stability condition Q ≡ 1 - γ² > 0, which prevents Ostrogradsky ghost instabilities for multi-field couplings |γ| < 1. Open-system Functional Renormalization Group flow integrates out ultraviolet modes down to the infrared horizon scale kIR = H₀ ~ 10⁻⁶⁰ MP, screening the bare Planckian vacuum energy to the observed cosmological constant Λ(H₀) ~ 10⁻¹²⁰ MP². Open-system relaxation generates a dissipative effective pressure peff = p - γ̃ρ that naturally violates the Strong Energy Condition without requiring ad hoc inflaton potentials or fundamental dark energy fields.