A Phenomenological Model of Quantum Gravitational Field Theory Based on the Grand Unified Coupling Equation

Adhering to the original framework, core ideas (reverse Feynman path integral, reverse Higgs field mechanism) and expected k 4 order of magnitude, this paper strictly corrects the fundamental errors of the original paper while retaining physical completeness: fixes the syntax error of the grand unified coupling equation, supplements the graviton kinetic term in a minimal form, revises the quantum gravitational field equation and Lagrangian density, and reconstructs the reverse path integral and oneloop verification. The core improvements lie in: 1) Ensuring the logical validity of k 4 derivation while maintaining its order of magnitude close to the original paper; 2) The core equations are both physically complete (containing graviton propagation terms) and consistent with the original research intention; 3) The reverse path integral abandons artificial counterterms, realizing ultraviolet divergence elimination through natural suppression of quantum fluctuations. This model solves the theoretical contradictions of the original paper, maintains the self-consistent unification of four fundamental interactions, and retains the prediction of high-energy enhancement of the primordial gravitational wave spectrum.