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arXiv 1902.05031gr-qchep-th
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一个与Starobinsky暴胀等价的准物质反弹

A quasi-matter bounce equivalent to Starobinsky inflation

L. F. Guimarães, F. T. Falciano, G. Brando

摘要:

在本文中,我们构造了一个反弹模型,模仿Starobinsky暴胀模型。我们的构造依赖于Wands的对偶性,这表明Mukhanov-Sasaki方程通过适当地改变其含时质量项而具有对称变换。这种构造性方法的优点之一是,可以控制对原始功率谱的每一个贡献,并检查我们可以在多大程度上用不同的场景模拟给定的原始模型。特别是,我们表明,映射到一个准物质反弹的Starobinsky膨胀给出了正确的标量谱指数$n_s-1$和张量标量比$r$之间的关系。

英文摘要:

In this paper we construct a bounce model that mimics the Starobinsky inflationary model. Our construction relies on Wands' duality, which shows that the Mukhanov-Sasaki equation has a symmetry transformation by changing appropriately its time-dependent mass term. One of the advantages of this constructive method is that one can control every contribution to the primordial power spectrum and check how far we can emulate a given primordial model with a different scenario. In particular, we show that mapping the Starobinsky inflation into a quasi-matter bounce gives the correct relation between the scalar spectral index $n_s-1$ and the tensor-to-scalar ratio $r$.

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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