论文标题
来自单色原始功率谱的宇宙矢量模式
The cosmological vector modes from a monochromatic primordial power spectrum
论文作者
论文摘要
高阶矢量模式的宇宙学背景可以通过一阶标量扰动生成。我们系统地研究了二阶和三阶向量模式。两个点函数的显式表达式$ \ langle v^{（n），λ} v^{（n），λ'} \ rangle $$ $ \ left（n = 2,3 \右）$和相应的功率谱。在单色原始功率谱的情况下，不存在二阶向量模式。但是，三阶矢量模式可以通过单色原始功率谱生成。并发现由二阶标量扰动来源的第三阶矢量模式主导了两个点函数$ \ langle v^{（3），λ} v^{（3），λ'} \ rangle $ and Power Spectrum and Power Spectrum。
The cosmological background of higher order vector modes can be generated by the first order scalar perturbations. We investigate the second order and the third order vector modes systematically. The explicit expressions of two point functions $\langle V^{(n),λ}V^{(n),λ'} \rangle$$\left(n=2,3\right)$ and power spectra corresponded are presented. In the case of a monochromatic primordial power spectrum, the second order vector modes do not exist. However, the third order vector modes can be generated by a monochromatic primordial power spectrum. And it is found that the third order vector modes sourced by the second order scalar perturbations dominate the two point function $\langle V^{(3),λ}V^{(3),λ'} \rangle$ and power spectrum corresponded.
