Abstract

The main properties of the logamediate inflation driven by a non-canonical scalar field in the framework of DGP braneworld gravity are investigated. Considering high energy conditions, we analytically calculate the slow-roll parameters. Then, we deal with perturbation theory and calculate the most important respective parameters, such as the scalar spectral index and the tensor-to-scalar ratio. We find that the spectrum of scalar fluctuations is always red-tilted. Also, we understand that the running in the scalar spectral index is nearly zero. Finally, we compare this inflationary scenario with the latest observational results from Planck 2018.

中文翻译：

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由非规范标量场驱动的 DGP 宇宙学中的对数膨胀

摘要

在 DGP 膜世界引力框架下，研究了由非规范标量场驱动的对数中间膨胀的主要性质。考虑到高能量条件，我们分析计算了慢滚参数。然后，我们处理微扰理论并计算最重要的相应参数，例如标量谱指数和张量标量比。我们发现标量涨落的光谱总是红倾的。此外，我们了解到标量频谱指数的运行几乎为零。最后，我们将这种通胀情景与普朗克 2018 年的最新观测结果进行了比较。