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arXiv 1005.4347hep-th
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非正则动力学项与功率谱的近似

On Non-Canonical Kinetic Terms and the Tilt of the Power Spectrum

Sera Cremonini, Zygmunt Lalak, Krzysztof Turzynski

摘要:

我们认为,在模型的通货膨胀与两个标量场和非正则动力学项有可能获得一个红色倾斜的曲率扰动的功率谱的非正则性引起的相互作用之间的曲率和isocurvature扰动。我们描述了一个非常简单的模型实现这一想法,数值研究其预测的扰动,并讨论在现实情况下的通货膨胀的应用。我们讨论了在这个模型中,膨胀势的尺度在多大程度上可以与密度涨落的幅度解耦。

英文摘要:

We argue that in models of inflation with two scalar fields and non-canonical kinetic terms there is a possibility of obtaining a red tilt of the power spectrum of curvature perturbations from noncanonicality-induced interactions between the curvature and isocurvature perturbations. We describe an extremely simple model realizing this idea, study numerically its predictions for the perturbations and discuss applications in realistic scenarios of inflation. We discuss to what extent in this model the scale of the inflationary potential can be decoupled from the amplitude of the density fluctuations.

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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