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Abstract: We explore the ability of experimental physics to uncover the underlyingstructure of the gravitational Lagrangian describing inflation. While theobservable degeneracy of the inflationary parameter space is large, futuremeasurements of observables beyond the adiabatic and tensor two-pointfunctions, such as non-Gaussianity or isocurvature modes, might reduce thisdegeneracy. We show that even in the absence of such observables, the range ofpossible inflaton potentials can be reduced with a precision measurement of thetensor spectral index, as might be possible with a direct detection ofprimordial gravitational waves.



Autor: Damien A. Easson, Brian A. Powell

Fuente: https://arxiv.org/



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