Exact values of Fourier dimensions of Gaussian multiplicative chaos on high dimensional torus

We determine the exact values of the Fourier dimensions for Gaussian Multiplicative Chaos measures on the d-dimensional torus Tᵈ for all integers d ≥ 1. This resolves a problem left open in previous works [LQT24,LQT25] for high dimensions d≥ 3. The proof relies on a new construction of log-correlated Gaussian fields admitting specific decompositions into smooth processes with high regularity. This construction enables a multi-resolution analysis to obtain sharp local estimates on the measure's Fourier decay. These local estimates are then integrated into a global bound using Pisier's martingale type inequality for vector-valued martingales.