Quantum Gravitational Suppression Theory: A Unified and Testable Framework for Quantum Gravity

We present Quantum Gravitational Suppression Theory (QGST), a framework that connects quantum mechanics with classical gravitational physics through an energy-dependent gravitational coupling constant. In this theory, the effective gravitational constant is given by:  G_eff(E) = G * [1 - (E0^2)/(E^2 + E0^2)]where G is Newton’s gravitational constant, E represents the local energy scale (applicable to systems ranging from black hole collapse to inflationary conditions), and E0 (approximately 10^18–10^19 GeV) denotes the quantum–classical transition threshold. As the local energy density increases, the effective gravitational coupling decreases, naturally preventing singularities during gravitational collapse and leading to stable, finite-density cores in black holes. This energy-dependent suppression mechanism also modifies black hole evaporation, potentially resulting in stable remnants that resolve the information paradox.QGST makes explicit predictions across several domains, including measurable amplitude suppression in high-frequency gravitational waves (above ~500 Hz), distinctive modifications in the cosmic microwave background anisotropies at high multipoles, and testable effects in laboratory-based quantum systems. By eliminating the need for extra fields or additional dimensions, this theory demonstrates how classical gravity can emerge directly from quantum principles, offering a minimalist yet robust candidate in the search for a quantum theory of gravity.