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arXiv · 1603.09567

Non-canonical two-field inflation to order $\xi^2$

Yun-Chao Wang·Towe Wang
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Abstract

In non-canonical two-field inflation models, deviations from the canonical model can be captured by a parameter $\xi$. We show this parameter is usually one half of the slow-roll order and analytically calculate the primordial power spectra accurate to order $\xi^2$. The super-horizon perturbations are studied with an improved method, which gives a correction of order $\xi^2$. Three typical examples demonstrate that our analytical formulae of power spectra fit well with numerical simulation.

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Yun-Chao Wang, Towe Wang. 2016-03-31. Non-canonical two-field inflation to order $\xi^2$. https://arxiv.org/abs/1603.09567

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