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Consistency relation for single scalar inflation

Andrei Gruzinov
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Abstract

Single scalar field inflation with a generic, non-quadratic in derivatives, field Lagrangian is considered. It is shown that non-Gaussianity of curvature perturbations is characterized by two dimensionless amplitudes. One of these amplitudes can be expressed in terms of the usual inflationary observables -- the scalar power, the tensor power, and the tensor index. This consistency relation provides an observational test for the single scalar inflation.

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Andrei Gruzinov. 2004-06-04. Consistency relation for single scalar inflation. https://doi.org/10.1103/physrevd.71.027301

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