Global Complexity–Stability Theory (GCST): The Big Bang as an Information Shock Transition A Thermodynamic Interpretation of the Early Universe and Cosmological Stability Limits

Abstract The Big Bang is reinterpreted in GCST as the Information Shock of the Universe — the instant when emerging quantum information volume (complexity C) exceeded the vacuum's carrying capacity, triggering a phase transition from near-zero complexity to explosive instability growth as α overwhelmed γ. Core stability condition: Pre-inflation: C → 0, α → ∞ (metric expansion), γ → 0 (Planck scale) → G → 0 → Rate-Induced Transition → birth of spacetime and entropy. Inflation acts as a buffer raising effective γ ∝ a(t). Current acceleration is slow cosmological R-collapse. This links GCST to quantum information cosmology: the Big Bang is the vacuum's catastrophic information overload.