论文标题
注意在不断扩展的宇宙中保存准本地能量
Note on the Conservation of Quasi-Local Energy in an Expanding Universe
论文作者
论文摘要
能量是否在不断扩大的宇宙中保存是一个有趣的问题。很容易说，随着宇宙的扩展，宇宙中的总能量必须增加。经过更详细的检查，这个问题很难解决，因为定义能量的含义，甚至可以通过保存能量的含义是一般相对论的困难问题。使用布朗和约克提供的准本地能量的定义，我们试图回答一个问题，即在扩展（或崩溃）宇宙中的总能量是保存的。
Whether energy is conserved in a universe which keeps expanding is an intriguing question. It is tempting to argue that the total energy within the universe would have to increase as the universe expands. Upon more detailed inspection the question is a lot harder to settle since defining what is meant by energy or even what is meant by energy being conserved is a difficult problem in general relativity. Using the definition of quasi-local energy provided by Brown and York we try to answer the question in which sense the total energy in an expanding (or collapsing) universe is conserved.
