Higher order spectra from an initially anisotropic universe
Higher order spectra from an initially anisotropic universe
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来自初始各向异性宇宙的高阶光谱
DOI：
10.1103/physrevd.85.103526
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发表时间：
2012
影响因子：
5
通讯作者：
南辻真人
中科院分区：
文献类型：
--
作者：
Jonathan White;Masato Minamitsuji;Misao Sasaki;南辻真人
在本文中，我们提出了通过初始各向异性宇宙中的高导数相互作用产生的标量场的高阶谱。虽然我们忽略了标量场对几何的反作用，但我们的分析应该与各向异性宇宙中暴胀场的量子涨落有很多重叠。我们还包括动量沿着垂直于原始首选方向的平面的平面模式，对于这种模式，初始各向异性的影响不会被抑制。负频率模式的存在产生了与德西特暴胀情况不同的特征。我们还表明，由于原始各向异性，三谱图中出现了更丰富的特征。
In this paper, we present the higher order spectra of a scalar field produced through the higher derivative interactions in the initially anisotropic universe. Although we ignore the backreaction of the scalar field on the geometry, our analysis should have much overlap with the quantum fluctuations of the inflaton field in the anisotropic universe. We also include the planar modes whose momenta are along the plane which is perpendicular to the primordial preferred direction, for which effects of the initial anisotropy are not suppressed. The presence of a negative frequency mode produces features distinguishable from the case of the de Sitter inflation. We also show that richer features appear in the trispectra due to the primordial anisotropy.