Internal-Informational Quantum Theory (IFT-ISE) From Double-Slit Interference to Black-Hole Informational Horizons Complete Theoretical and Experimental Edition

IFT-ISE is a unified quantum–informational framework in which wave–particle behavior emerges from the interaction between informational structure, geometry, and time. The model extends the standard photonic Hilbert space by introducing an internal informational subsystem, not as a new force or interaction, but as a generator of relational constraints. The framework combines Informational Field Theory (IFT)—where spatial probability distributions arise from local informational entropy gradients—with Internal State Encoding (ISE), a discrete informational basis governing the accessibility of particle-like states. Within this perspective, informational asymmetry does not induce collapse through measurement, but generates relational time and state distinguishability within the local informational geometry. Since photons possess no proper time, the emergence of even minimal relational time renders wave-like propagation incompatible, enforcing particle-like behavior without invoking observer-induced collapse. This reinterpretation provides a physically transparent explanation for the extreme sensitivity of the double-slit experiment to infinitesimal which-path information. IFT-ISE reconstructs the double-slit experiment, predicts upstream coherence modulation prior to slit interaction, and extends naturally to black-hole horizons, where extreme informational geometry suppresses temporal accessibility and amplifies informational structure. Mathematical derivations, conceptual diagrams, and experimentally testable predictions are provided, offering a coherent informational foundation for quantum optical and gravitational boundary phenomena.