Emergent Gravity from Quantum Decoherence. A Unified Framework for Spacetime, Particle Physics, and Cosmology

We propose a theory where classical spacetime, dark matter, dark energy, and Standard Model particle masses emerge from quantum decoherence of Planck scale geometries. The framework unifies general relativity, particle physics, and cosmology through a single mechanism grounded in quantum information theory. Key results include - Spacetime classicalization via Lindblad decoherence - Dark matter as residual decoherence effects in modified Einstein equations - Fermion masses generated by entropy dependent Higgs couplings - A natural explanation for the arrow of time Testable predictions for MAQRO, HL LHC, and DECIGO are provided.