Horizon ratio bound for inflationary fluctuations.
Horizon ratio bound for inflationary fluctuations.
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通货膨胀波动的水平比率。
DOI：
10.1103/physrevlett.91.131301
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发表时间：
2003
影响因子：
8.6
通讯作者：
L. Hui
中科院分区：
文献类型：
--
作者：
S. Dodelson;L. Hui
我们证明，重力波背景振幅意味着在暴胀结束时波长与视界比的一个鲁棒的上限：λ/H（-1）小于或近似等于e（60），只要宇宙能量密度在暴胀后的下降速度不超过辐射。这个极限意味着，对于感兴趣的波模式，在视界出口和暴胀结束之间的e折叠的数量N更少，类似于60加上一个依赖于模型的因子-对于大量的慢滚模型，N小于或近似等于67。作为一个例子，这个界限通过关闭大N（<62）的逃生舱口，巩固了宇宙微波背景各向异性和具有phi（4）势的混沌暴胀观测之间的张力。
We demonstrate that the gravity wave background amplitude implies a robust upper bound on the wavelength-to-horizon ratio at the end of inflation: lambda/H(-1) less than or approximately equal e(60), as long as the cosmic energy density does not drop faster than radiation subsequent to inflation. This limit implies that N, the number of e-folds between horizon exit and the end of inflation for wave modes of interest, is less, similar 60 plus a model-dependent factor-for vast classes of slow-roll models, N less than or approximately equal 67. As an example, this bound solidifies the tension between observations of the cosmic microwave background anisotropies and chaotic inflation with a phi(4) potential by closing the escape hatch of large N (<62).