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arXiv 1102.5052astro-ph.COgr-qchep-th
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原始非高斯性

Primordial non-Gaussianities

David Langlois

摘要:

本文从理论的角度对原始非高斯性进行了综述。在给出描述非线性宇宙学扰动的一般形式之后,讨论了几类模型:非标准拉格朗日量的多场暴胀、调制场、曲率场,并举例说明。在后一种情况下,特别强调的是把等曲率扰动,这可能会留下一个特定的签名在非高斯。

英文摘要:

This contribution gives an overview on primordial non-Gaussianities from a theoretical perspective. After presenting a general formalism to describe nonlinear cosmological perturbations, several classes of models, illustrated with examples, are discussed: multi-field inflation with non-standard Lagrangians, modulaton fields, curvaton fields. In the latter case, a special emphasis is put on the isocurvature perturbations, which could leave a specific signature in non-Gaussianities.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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