论文标题
在物质的功率谱上的各向异性的烙印以弹跳宇宙为背景
Imprints of Anisotropy on the Power Spectrum in Matter Dominated Bouncing Universe as Background
论文作者
论文摘要
在本文中，我们旨在研究以物质主导的崩溃宇宙为背景，并寻找与这种尺度不变性的偏差，以研究各向异性对规模不变的功率谱。在设置了此背景之后，我们考虑了一个无质量的标量字段并确定相关性，首先使用扰动方法，在这种方法中，各向异性背景的近似于有效的各向同性度量标准，该方法由物质占主导地位的崩溃宇宙代表，其次是通过数值来求解磁场方程，然后通过数值来求解范围，然后获得模块的范围。使用这两种技术，我们都在功率谱与量表不变性的偏差上获得了上限。我们还为较小的模式制定了功率谱，并查看是否有可能通过弹跳方案来解释CMB中观察到的异常情况。
In this paper, we aim to investigate the effects of the anisotropy on the scale-invariant power spectrum considering the matter-dominated collapsing universe as background and look for the deviations from this scale invariance. Having set up this background, we consider a massless scalar field and work out the correlations, first by using the perturbative approach in which the anisotropic background is approximated with an effective isotropic metric represented by the metric of matter dominated collapsing universe, second by directly solving the field equation numerically, and then obtain the power spectrum for the range of modes which are of cosmological interest. Using both techniques, we get an upper bound on the deviation in the power spectrum from the scale invariance. We also work out the power spectrum for much smaller modes and look at whether it is possible to explain the observed anomalies in CMB via the matter bounce scenario.
