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arXiv 1906.09299gr-qc
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通货膨胀的非规范方法

Noncanonical Approaches To Inflation

Héctor Ramírez

摘要:

在这篇论文中,我们涵盖了研究暴胀的唯象和理论方法:从模型独立的参数化到引力的修改。在一个回顾的风格,我们提供了一个简短的介绍标准宇宙学模型和规范的单场暴胀场景的动力学的概述-包括动力学和原始量子涨落的演变和他们的签名对当前的观测。然后,我们简要地讨论了Mukhanov参数化,一个独立于模型的方法来研究规范的通货膨胀的情况下允许的参数空间。随后,我们回顾了产生二阶运动方程的最一般的标量张量和标量矢量张量引力理论的构造,以及在这些框架内发展的主要暴胀模型。最后,我们展示了超越慢滚近似的新技术-广义慢滚和优化慢滚-在规范和非规范的情况下更准确地计算通货膨胀的可观测量。我们补充了详细的附录上的宇宙学扰动理论和有用的表达式为超越GR宇宙学的讨论。结论是从本论文获得的结果。

英文摘要:

In this Thesis by publication, we cover both phenomenological and theoretical approaches to the study of inflation: from model-independent parametrizations to modifications of gravity. In a review style, we provide a short introduction to the standard cosmological model and an overview of the dynamics of the canonical single-field inflationary scenario---including the dynamics and evolution of the primordial quantum fluctuations and their signatures on current observations. We then briefly discuss the Mukhanov parametrization, a model-independent approach to study the allowed parameter space of the canonical inflationary scenario. Later, we review the construction of the most general scalar-tensor and scalar-vector-tensor theories of gravity yielding second-order equations of motion, as well as the main models of inflation developed within these frameworks. Finally, we demonstrate new techniques that move beyond the slow-roll approximation---Generalized Slow-roll and Optimized Slow-Roll---to compute the inflationary observables more accurately, in both canonical and noncanonical scenarios. We complement the discussion with detailed appendices on the cosmological perturbation theory and useful expressions for the beyond-GR cosmology. Conclusions are drawn from the results obtained for this Thesis.

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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