Primordial Gravitational Waves from Unified Quantum Gravity: A LISA Prediction

Here, we present a minimal inflationary model from Unified Quantum Gravity (UQG) where the inflaton is the Goldstone boson of spontaneously broken Weyl symmetry---the same field that resolves spacetime singularities and drives late-time cosmic acceleration. The model makes a falsifiable prediction: a tensor-to-scalar ratio $r = 0.00388 \pm 0.0005$, testable by LISA in 2037-2038. All six CMB observables match Planck 2018 constraints within $1\sigma$: spectral index $n_s = 0.9640$, running $\alpha_s \approx 0$, and primordial non-Gaussianity $f_{\rm NL} \approx 0$, confirming single-field slow-roll dynamics. This represents maximum theoretical unification: one field explains inflation, singularity resolution, and dark energy, with experimental verification within 15 years.