Separated Universes Theory (SUT): Restoring Determinism in Quantum Phenomena

We present the Separated Universes Theory (SUT), a novel ontological framework proposing that each observer carries its own independent spacetime manifold. This single postulate provides deterministic, locally causal explanations for three major puzzles in modern physics: (1) The constancy of the speed of light emerges as a mechanical consequence of measurements occurring within the observer's carried space—not as a mysterious postulate. (2) Quantum entanglement is reinterpreted as local energy depletion within a shared quantum space, eliminating "spooky action at a distance." (3) Quantum tunneling becomes a resonant summoning process conditioned on the existence of a receiver, rather than probabilistic barrier penetration. SUT maintains full compatibility with Quantum Electrodynamics (QED) and relativity while restoring Einstein's vision of determinism, realism, and locality. We propose three falsifiable experimental predictions: the "Lost Photon" effect (P 10⁻³), resonance-enhanced tunneling (rate increase by factor 2-10), and boundary effects in carried spaces (δ 10⁻¹⁴). This work offers a testable foundation for quantum mechanics that is deterministic, geometrically grounded, and philosophically coherent.