Rapid field excursions and the inflationary tensor spectrum
Rapid field excursions and the inflationary tensor spectrum
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快速场偏移和暴胀张量谱
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
S. Paban
中科院分区：
文献类型：
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作者：
D. Carney;W. Fischler;E. Kovetz;D. Lorshbough;S. Paban
本文研究了质量突变场对暴胀功率谱的影响。在这种情况下，当场χ变成光时，它将被激发。这个过程有助于张量功率谱。我们计算这些影响的规范不变的方式，我们使用一种新的分析方法来评估由于χ激发的张量谱的修正。在标量场的情况下，我们表明，只要微扰展开是有效的张量的净影响是小的。因此，在这些情况下，张量模的测量仍然与哈勃尺度一一对应。
A bstractWe consider the effects of fields with suddenly changing mass on the inflationary power spectra. In this context, when a field χ becomes light, it will be excited. This process contributes to the tensor power spectrum. We compute these effects in a gauge-invariant manner, where we use a novel analytical method for evaluating the corrections to the tensor spectrum due to χ excitations. In the case of a scalar field, we show that the net impact on the tensors is small as long as the perturbative expansion is valid. Thus, in these scenarios, measurement of tensor modes is still in one-to-one correspondence with the Hubble scale.
影响因子：
8.7
作者：
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者：
Wright, E. L.