ournal of C osmology and A stroparticle hysics J Renormalization of the inflationary perturbations revisited
ournal of C osmology and A stroparticle hysics J Renormalization of the inflationary perturbations revisited
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宇宙学和星体粒子物理学杂志 J 重新审视暴胀扰动的重正化
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通讯作者：
N. Ishida
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作者：
H. Tozawa;M. Watanabe;N. Ishida
.在这项工作中，我们澄清了弯曲背景下的重整化方面，重点关注非线性扰动振幅的潜在分支。我们提供了一个替代的观点，经常使用的绝热处方推导绝热减法项和传统的重整化之间的对应关系。具体地说，我们展示了绝热减法如何可以表示为一组通过雷德确定作用量的裸参数而引入的计数项。然后，我们的绝热减法表示使我们能够容易地找到其他重整化处方，这些处方仅在计数器项的有限部分中不同。作为我们的主要结果，我们提出对于二次积分，如何可以一致地将积分中微扰谱的重整化表示为裸宇宙学常数和普朗克质量的雷德定义，使得可观测的预言与未重整化的结果相一致。
. In this work we clarify aspects of renormalization on curved backgrounds focussing on the potential ramifications on the amplitude of inflationary perturbations. We provide an alternate view of the often used adiabatic prescription by deriving a correspondence between the adiabatic subtraction terms and traditional renormalization. Specifically, we show how adiabatic subtraction can be expressed as a set of counter terms that are introduced by redefining the bare parameters of the action. Our representation of adiabatic subtraction then allows us to easily find other renormalization prescriptions differing only in the finite parts of the counter terms. As our main result, we present for quadratic inflation how one may consistently express the renormalization of the spectrum of perturbations from inflation as a redefinition of the bare cosmological constant and Planck mass such that the observable predictions coincide with the unrenormalized result.