One of the main objectives of modern cosmology is to explain the origin and evolution of cosmic structures at different scales. The principal force responsible for the formation of such structures is gravity. In a general relativistic framework, we have shown that matter density contrasts do not grow over time at scales exceeding the cosmic screening length, which corresponds to a cosmological scale of the order of two to three gigaparsecs at the present time, at which gravitational interactions exhibit an exponential cut-off. This is a purely relativistic effect. To demonstrate the suppression of density growth, we have performed N-body simulations in a box with a comoving size of 5.632 Gpc/h and obtained the power spectrum of the mass density contrast. We have shown that it becomes independent of time for scales beyond the screening length as a clear manifestation of the cosmic screening effect.

中文翻译：

---

在超过宇宙筛选长度的尺度上抑制物质密度增长


现代宇宙学的主要目标之一是解释不同尺度的宇宙结构的起源和演化。形成这种结构的主要力量是重力。在一般相对论框架中，我们已经证明，在超过宇宙屏蔽长度的尺度上，物质密度对比不会随着时间的推移而增加，宇宙屏蔽长度对应于目前二到三千兆秒差距的宇宙学尺度，在这个尺度上，引力相互作用表现出指数截止。这是纯粹的相对论效应。为了证明对密度增长的抑制，我们在同移尺寸为 5.632 Gpc/h 的盒子中进行了 N 体模拟，并获得了质量密度对比的功率谱。我们已经证明，对于超出筛选长度的尺度，它变得与时间无关，这是宇宙筛选效应的明显体现。