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arXiv 1002.1700astro-ph.CO
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曲率情景、调制再加热和膨胀的非均匀结束是如何相关的

How the curvaton scenario, modulated reheating and an inhomogeneous end of inflation are related

Laila Alabidi, Karim A. Malik, Christian T. Byrnes, Ki-Young Choi

摘要:

在本文中,我们分析了三种模型的早期宇宙,其各自的机制产生的曲率扰动被认为是不同的。我们发现,事实上的机制是非常相似的,因此解释了为什么他们会产生一个大的非高斯性。我们表明,机制产生的原始曲率扰动,因此可观察到的非高斯性,是类似的曲率和调制再加热模型。在这两种情况下,模型都可以用构成流体之间的能量传递来表示。然后,我们表明,这也是真实的机制,产生的曲率扰动对称打破结束的通货膨胀。然后,我们将其与非高斯贡献的曲率扰动,并发现它是成反比的效率与曲率扰动之间的流体。第一次,我们概括的调制再加热模型,允许非线性能量传递率。

英文摘要:

In this paper we analyse three models of the early universe, for which the respective mechanisms for generating the curvature perturbation are considered disparate. We find that in fact the mechanisms are very similar, and hence explain why they give rise to a large non-gaussianity. We show that the mechanism for generating the primordial curvature perturbation, and hence the observable non-gaussianity, is similar in both the Curvaton and Modulated Reheating models. In both cases the model can be written in terms of an energy transfer between the constituting fluids. We then show that this is also true for the mechanism of generating the curvature perturbation by symmetry breaking the end of inflation. We then relate this to the non-gaussian contribution to the curvature perturbation and find that it is inversely proportional to the efficiency with which the curvature perturbation is transferred between the fluids. For the first time, we generalise models of modulated reheating to allow for a non-linear energy transfer rate.

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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