Discrete to continuum transition in quantum gravity models

从一开始，对空间和时间本质的深入理解一直是物理学发展的主要驱动因素之一。它在爱因斯坦的广义相对论中达到顶峰，该理论指出时空是一个动态的物体，与宇宙中的所有物质相互作用，并产生引力。但除此之外，我们知道物质是由量子理论描述的，因此时空也必须是量子的。构建时空的量子理论，进而延伸引力理论，是当今基础物理学面临的最大挑战之一。

A deeper understanding of the nature of space and time was and still is one of the main driving factors for the development of physics from its very beginnings. It culminated in Einstein's theory of general relativity, stating that space-time is a dynamical object, interacting with all the matter of the universe and giving rise to the gravitational force. But in addition, we know that matter is described by quantum theory, and therefore space-time must also be quantum. The construction of a quantum theory of space-time, and by extension gravity, is one of the biggest challenges for fundamental physics today.