Inflation from periodic extra dimensions
Inflation from periodic extra dimensions
复制标题
周期性额外维度的膨胀
DOI：
10.1088/1475-7516/2017/07/011
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发表时间：
2017
影响因子：
6.4
通讯作者：
Tetsutaro Higaki and Yoshiyuki Tatsuta
中科院分区：
文献类型：
--
作者：
Kohri Kazunori;Matsui Hiroki;H. Fukaya;市川雄一;山口尚輝;Kazuya Aoki;S. Oguri;堀越宗一;Tohru Ozawa;Tetsutaro Higaki and Yoshiyuki Tatsuta
我们讨论了一种基于弦激发超引力的小场膨胀的实现。在伴随着额外维度的理论中，现实情况下需要将它们压缩成小半径。由于额外维可以具有周期性，在低能量尺度下，在额外维的模变换下会出现(准)周期函数。这样的周期性可以导致所谓的多自然膨胀模型的UV完成，其中膨胀势由衰减常数小于普朗克标度的多个正弦函数之和组成。作为说明，我们构造了一个超对称破缺模型，然后证明了这样的暴胀势可以由包含奥比福尔德的额外维度的相交薄膜模型中的世界薄片瞬子之和来产生。我们还通过数值分析给出了对宇宙可观测性的预测。
We discuss a realization of a small field inflation based on string inspired supergravities. In theories accompanying extra dimensions, compactification of them with small radii is required for realistic situations. Since the extra dimension can have a periodicity, there will appear (quasi-) periodic functions under transformations of moduli of the extra dimensions in low energy scales. Such a periodic property can lead to a UV completion of so-called multi-natural inflation model where inflaton potential consists of a sum of multiple sinusoidal functions with a decay constant smaller than the Planck scale. As an illustration, we construct a SUSY breaking model, and then show that such an inflaton potential can be generated by a sum of world sheet instantons in intersecting brane models on extra dimensions containing orbifold. We show also predictions of cosmic observables by numerical analyzes.