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arXiv 2402.14910gr-qchep-phhep-th
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原初暴胀功率谱的重整化

Renormalization of the primordial inflationary power spectra

Silvia Pla, Ben A. Stefanek

AI总结:

本文通过规范不变分析计算重整化后的标量与张量功率谱,证明标准超视界预言是晚期吸引子且始终紫外有限,并不受暴胀后状态方程影响。

摘要:

此前有观点认为,重整化效应会在宇宙微波背景可测量的尺度上显著降低暴胀谱的振幅。通过规范不变分析,我们计算了重整化后的标量和张量功率谱,并追踪它们在一个暴胀宇宙中的演化;该宇宙随后过渡到具有增长视界的 FRW 阶段。对于源自 Minkowski 真空涨落的扰动,我们证明,超视界尺度上谱的标准预言是一个晚期吸引子,同时它们在任何时刻都具有紫外有限性。我们的结果独立于暴胀后的状态方程,表明标准预言具有完全的稳健性。

英文摘要:

It has been suggested that the effects of renormalization significantly reduce the amplitude of the inflationary spectra at scales measurable in the cosmic microwave background. Via a gauge-invariant analysis, we compute the renormalized scalar and tensor power spectra and follow their evolution in an inflating universe that undergoes a transition to an FRW phase with a growing horizon. For perturbations originating from Minkowski vacuum fluctuations, we show that the standard prediction for the spectra on superhorizon scales is a late-time attractor, while they are UV finite at all times. Our result is independent of the equation of state after inflation, showing that the standard prediction is fully robust.

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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