标题： 非均匀性对宇宙膨胀的影响 显示英文标题

标题： Effects of Inhomogeneities on Cosmic Expansion

摘要： 我们评估了非均匀能量对宇宙膨胀率的影响。 我们的方法是在势能和速度上扩展到牛顿阶，但同时充分考虑非线性密度非均匀性。 在密度的一阶情况下，动能和引力势能以与空间曲率相同的膨胀因子比例对宇宙总能量做出贡献。 在强非线性区域，增长趋于饱和，并且非均匀能量对膨胀率的净影响在所有时间里都可忽略不计。 特别是，非均匀性贡献永远不会模拟暗能量的效果或引发加速膨胀。 显示英文摘要

摘要： We evaluate the effect of inhomogeneity energy on the expansion rate of the universe. Our method is to expand to Newtonian order in potential and velocity but to take into account fully nonlinear density inhomogeneities. To linear order in density, kinetic and gravitational potential energy contribute to the total energy of the universe with the same scaling with expansion factor as spatial curvature. In the strongly nonlinear regime, growth saturates, and the net effect of the inhomogeneity energy on the expansion rate remains negligible at all times. In particular, inhomogeneity contributions never mimic the effects of dark energy or induce an accelerated expansion.