Theoretical implications of detecting gravitational waves

摘要: This paper is the third in a series of theorems which state how cosmological observations can provide evidence for an early phase acceleration universe. Previous demonstrated that observed power spectrum scalar perturbations forces all possible alternative theories inflation to other than General Relativity. It was shown generically, without accelerated expansion, these alternatives have break at least one following tenets classical general relativity: Null Energy Condition (NEC), subluminal signal propagation, or sub-Planckian energy densities. In this we prove detection primordial gravitational waves large scales independent support expansion. proof does not rely on spectral index tensor modes but relies validity quantum field theory curved space time and being sourced from adiabatic vacuum fluctuations. Our approach, like case scalars, by contradiction: investigate possibility detectable fluctuations non-accelerating, universe using perturbation derive contradictory limits dynamics. The contradiction implies more our axioms must been broken. bound only of, also stronger obtained spectrum.