arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1410.0882hep-th
收藏

Minkowski空间的暴胀

Inflation from Minkowski Space

David Pirtskhalava, Luca Santoni, Enrico Trincherini, Patipan Uttayarat

备注：
28+10 pages, 4 figures
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

我们提出了一类标量模型，一旦耦合到引力，导致宇宙学，顺利和稳定地连接一个膨胀的准德西特宇宙的低，甚至零曲率，最大对称时空在渐近过去，强烈违反零能量条件（$\dot H\gg H^2$）在中间时间。这些模型是共形伽利略拉格朗日量的变形，因此基于精确和近似的对称性，以确保整个图像的量子鲁棒性。由此产生的宇宙学背景可以被看作是伽利略起源方案的正则化扩展，或者，等价地，作为“早期完成”的暴胀实现。晚期暴胀动力学具有现象学上有趣的性质：它可以在有效场论的有效范围内产生大的张量标量比，并可以导致相当大的等边非高斯性。

英文摘要：

We propose a class of scalar models that, once coupled to gravity, lead to cosmologies that smoothly and stably connect an inflationary quasi-de Sitter universe to a low, or even zero-curvature, maximally symmetric spacetime in the asymptotic past, strongly violating the null energy condition ($\dot H\gg H^2$) at intermediate times. The models are deformations of the conformal galileon lagrangian and are therefore based on symmetries, both exact and approximate, that ensure the quantum robustness of the whole picture. The resulting cosmological backgrounds can be viewed as regularized extensions of the galilean genesis scenario, or, equivalently, as `early-time-complete' realizations of inflation. The late-time inflationary dynamics possesses phenomenologically interesting properties: it can produce a large tensor-to-scalar ratio within the regime of validity of the effective field theory and can lead to sizeable equilateral nongaussianities.

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。

↑