Selective decohrence during cosmic expansion

This paper presents my finding that quantum decoherence during the universe's expansion selected certain states over others. I apply Zurek's well-known einselection concept to cosmology and show that modes near the horizon scale survived, while others decohered into entropy. The main result is that 20-50% of primordial quantum states persisted as classical matter. I derive this from the interaction Hamiltonian without any free parameters. The prediction is testable by Euclid and Planck data within 10 years.