圈量子引力的回顾

A Review of Loop Quantum Gravity

圈量子引力在物理学中占据非常重要的地位。20世纪90年代后,圈量子引力得到了很大的发展,建立了数学上定义严格的运动学框架,引入自旋结网圈作为量子引力态,给出了很多有意义的物理结论,如几何算符的量子化,并且它还在黑洞物理和宇宙学等方向上展现了强有力的发展势头。它是一个非常活跃的量子引力理论,被越来越广泛地应用到普朗克尺度物理中去,这也加强了理论学家们的信心。本文试着对圈量子引力的这些主要结果做个回顾。

Loop quantum gravity plays a very important role in the developments of physics. Since 1980s, great advances have been made in loop quantum gravity theory. It constructs mathematically well kinematic frame, introduces spinnetwork as quantum state of gravity, gives many significant physics and quantum cosmography. It is a very lively theory, and has been more and more widely applied into plank scale physics, which enhances the confidence of theorists. This paper attempts to give a review of those main results on loop quantum gravity.