论文标题
物质功率谱的磁场反应
Magnetic field back reaction on the matter power spectrum
论文作者
论文摘要
在最低的顺序下，磁场被冻结，而扩展的宇宙流体不会随着时间的推移而发展。在临近领先的顺序上，感应方程是由巴里恩速度和磁场幅度之间的相互作用项来提出的，该磁场幅度导致共磁场的非平凡演化。此外，它诱导绝热曲率模式与磁模式之间的非平凡交叉相关性。这种交叉相关性以及诱导物质扰动的演变会导致对小尺度上总物质功率谱的有趣影响。
At lowest order comoving magnetic fields which are frozen-into the expanding cosmic fluid do not evolve in time. At next-to-leading order the induction equation is sourced by the interaction term between the baryon velocity and the magnetic field amplitude which leads to a non-trivial evolution of the comoving magnetic field. Moreover, it induces non-trivial cross correlations between the adiabatic curvature mode and the magnetic mode. This cross correlation together with the evolution of the induced matter perturbation leads to interesting effects on the total matter power spectrum at small scales.
