论文标题
宇宙学中的准局部保护法：第一眼
Quasilocal conservation laws in cosmology: a first look
论文作者
论文摘要
应力 - 能量 - 摩肌的准定义 - 即以边界密度（代替局部体积密度）的形式 - 事实证明，通常在制定和应用一般相对论的保护定律方面非常有用。在本文中，我们首先要将这些外观应用于宇宙学，特别是使用Brown-York的准应力 - 能量 - 能量张量进行物质和重力组合。我们计算此张量，并为具有完美的流体物质源的平坦FLRW时空提供了一些简单的结果。
Quasilocal definitions of stress-energy-momentum---that is, in the form of boundary densities (in lieu of local volume densities)---have proven generally very useful in formulating and applying conservation laws in general relativity. In this essay, we take a first basic look into applying these to cosmology, specifically using the Brown-York quasilocal stress-energy-momentum tensor for matter and gravity combined. We compute this tensor and present some simple results for a flat FLRW spacetime with a perfect fluid matter source.
