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- W3100295088 endingPage "021" @default.
- W3100295088 startingPage "021" @default.
- W3100295088 abstract "Within the class of inflationary models, k-inflation represents the most general single field framework that can be associated with an effective quadratic action for the curvature perturbations and a varying speed of sound. The incoming flow of high-precision cosmological data, such as those from the Planck satellite and small scale Cosmic Microwave Background (CMB) experiments, calls for greater accuracy in the inflationary predictions. In this work, we calculate for the first time the next-to-next-to-leading order scalar and tensor primordial power spectra in k-inflation needed in order to obtain robust constraints on the inflationary theory. The method used is the uniform approximation together with a second order expansion in the Hubble and sound flow functions. Our result is checked in various limits in which it reduces to already known situations." @default.
- W3100295088 created "2020-11-23" @default.
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- W3100295088 date "2013-06-17" @default.
- W3100295088 modified "2023-09-25" @default.
- W3100295088 title "K-inflationary power spectra at second order" @default.
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- W3100295088 doi "https://doi.org/10.1088/1475-7516/2013/06/021" @default.
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