Gauge-invariant perturbations at second order: multiple scalar fields on large scales
Gauge-invariant perturbations at second order: multiple scalar fields on large scales
复制标题
二阶规范不变扰动：大尺度上的多个标量场
DOI：
10.1088/1475-7516/2005/11/005
复制
发表时间：
2005
影响因子：
6.4
通讯作者：
Karim A. Malik
中科院分区：
文献类型：
--
作者：
Karim A. Malik
导出了大尺度平面弗里德曼-罗伯逊-沃克背景时空中与重力最小耦合的多重标量场的控制方程。我们包括了二阶的标量扰动，并用一阶和二阶的物理透明的标准不变变量来写方程。这使得我们可以只用一阶和二阶平片上的场涨落来表示二阶摄动Klein-Gordon方程。
We derive the governing equations for multiple scalar fields minimally coupled to gravity in a flat Friedmann–Robertson–Walker background spacetime on large scales. We include scalar perturbations up to second order and write the equations in terms of physically transparent gauge-invariant variables at first and second order. This allows us to write the perturbed Klein–Gordon equation at second order solely in terms of the field fluctuations on flat slices at first and second order.