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arXiv 0811.1318hep-phastro-phhep-th
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曲率和偏离慢滚的非均匀场景

Curvatons and inhomogeneous scenarios with deviation from slow-roll

Tomohiro Matsuda

摘要:

研究了暴胀过程中标量场偏离慢滚点处的谱指数。考虑到可能导致显着差异的哈勃参数的时间导数和演化方程中的条款的偏差,我们展示了偏差如何影响曲率扰动的光谱指数。考虑到传统的暴胀、弯曲和其他非均匀场景作为产生宇宙学扰动的机制,我们考察了由偏离标准慢滚引起的光谱指数是否可以解释在k=0.002/Mpc时光谱指数n-1>0,同时在较小的尺度上保持n-1<0。

英文摘要:

The spectral index is studied at the point where scalar fields deviate from slow-roll during inflation. Considering the deviation that may cause a significant difference to the time derivative of the Hubble parameter and also to the terms in the evolution equation, we show how the deviation affects the spectral index of the curvature perturbations. Considering conventional inflation, curvatons and other inhomogeneous scenarios as mechanisms for generating the cosmological perturbation, we examine whether the spectral index induced by the deviation from the standard slow-roll can explain the spectral index n-1>0 at k=0.002/Mpc while keeping n-1<0 at a smaller scale.

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