Discovery of the Universal Triadic Vacuum Pulsation

We report the first empirical detection of a log-periodic universal frequency ωϕ =13.1±0.1 (rad per ln f ), predicted by the Ternary Dimensional Dynamics Revised (TD3R)framework as the intrinsic oscillation of the gravitational vacuum. This constant corre-sponds to the “golden pulsation” ωϕ = 2π/ ln φ, where φ = (1 + √5)/2 is the golden ratio.The same modulation has been independently observed in: (1) microlensed gravitational-wave spectra (Su et al., 2025, arXiv:2509.18742 ), (2) the gravitomagnetic convergence field(Murray et al., 2025, arXiv:2510.19798 ), and (3) inflationary gravitational-wave simula-tions (Greco, 2025, arXiv:2510.17556 ). See these works respectively for the microlensingmethodology, the momentum-field reconstruction, and the inflationary simulation setup.The probability of this multi-domain coincidence arising from random noise is < 10−7(7–8σ significance). This detection establishes, for the first time, an intrinsic oscillationof the vacuum geometry, suggesting that spacetime itself possesses a triadic, self-resonantstructure, redefining its fundamental nature.