This work introduces Quantum Compression Theory (QCT), a novel theoretical framework proposing that all fundamental interactions, spacetime geometry, and cosmological phenomena emerge from the dynamics of a single scalar field of quantum entanglement density, (\rho_{\text{ent}}). QCT offers a unified physical mechanism for several unresolved anomalies in modern physics without postulating new fundamental particles.Key findings and predictions include: A Novel Origin for Dark Matter: The theory posits that the gravitational effects attributed to dark matter in the early universe were caused by a "Heavy Hadron Era," a phase of temporarily stabilized, known heavy baryons. An Explanation for the Positron Anomaly: The observed excess of high-energy positrons in cosmic rays (AMS-02 anomaly) is interpreted as a direct observational echo from the decay of the Heavy Hadron Era. A Mechanism for Particle Stability: The stability of matter is explained via the "Atomic Antenna" mechanism, a dynamic energy exchange with the vacuum that accounts for the measured isotope shift and links particle stability directly to the expansion of the cosmos. A Finite Proton Lifetime: As a direct consequence of its stability model, QCT predicts a finite, calculable lifetime for the proton, dictated by the continued expansion of the universe.The framework provides a physical resolution to the Hubble tension, derives particle properties like spin and mass from topological defects, and presents a suite of falsifiable, experimentally testable predictions, including specific signatures in the Cosmic Microwave Background (CMB) and variations in beta-decay rates. This paper presents the complete mathematical formalism and cosmological implications of QCT as a candidate for a new paradigm in fundamental physics.