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arXiv 1611.03316hep-phastro-ph.COgr-qchep-th
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发条式通货膨胀

Clockwork Inflation

Alex Kehagias, Antonio Riotto

摘要:

我们研究了最近提出的在抑制相互作用的情况下提供光自由度的发条机制,并通过各种例子表明,它可以在暴胀场景中有效地实现,以产生平坦的暴胀子势和小的密度扰动,而无需微调。我们还研究了德西特的发条引力子,有趣的是,我们发现,相应的发条电荷是网站相关的。因此,张量模式的量一般被抑制相对于标准的情况下,不采用发条装置设置。这一点可以在恢复暴胀模型时发挥作用,因为暴胀产生了过多的张量模,这些模型本来应该被排除在外。

英文摘要:

We investigate the recently proposed clockwork mechanism delivering light degrees of freedom with suppressed interactions and show, with various examples, that it can be efficiently implemented in inflationary scenarios to generate flat inflaton potentials and small density perturbations without fine-tunings. We also study the clockwork graviton in de Sitter and, interestingly, we find that the corresponding clockwork charge is site-dependent. As a consequence, the amount of tensor modes is generically suppressed with respect to the standard cases where the clockwork set-up is not adopted. This point can be made a virtue in resurrecting models of inflation which were supposed to be ruled out because of the excessive amount of tensor modes from inflation.

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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