Observational signatures and non-Gaussianities of general single-field inflation

上传 / 金钱豹 ·2016-11-19 物理学,理论物理
作者 / Xingang Chen, Min-xin Huang, Shamit Kachru, and Gary Shiu

期刊 / JCAP

发表时间 / 2007-01-02

数字识别码 / 10.1088/1475-7516/2007/01/002

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We perform a general study of primordial scalar non-Gaussianities in single-field inflationary models in Einstein gravity. We consider models where the inflaton Lagrangian is an arbitrary function of the scalar field and its first derivative, and the sound speed is arbitrary. We find that under reasonable assumptions, the non-Gaussianity is completely determined by five parameters. In special limits of the parameter space, one finds distinctive 'shapes' of the non-Gaussianity. In models with a small sound speed, several of these shapes would become potentially observable in the near future. Different limits of our formulae recover various previously known results.

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Is the Cosmic Microwave Background Gaussian? 垂死挣扎? https://cqgplus.com/2017/04/18/is-the-cosmic-microwave-background-gaussian/

2017-04-26 16:13:39

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然而PLANCK并没有看见非高斯,忧伤……
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2016-12-27 13:43:18

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计算非高斯的经典文献,新手入门必备~

2016-12-18 20:38:44

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