宇宙是唯一的吗?  

Is ours the only universe?

作　　者：陈学雷[1] CHEN XueLei(National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China)

机构地区：[1]中国科学院国家天文台,北京100012

出　　处：《科学通报》2017年第11期1103-1110,共8页Chinese Science Bulletin

摘　　要：宇宙是唯一的吗?本文介绍近年来宇宙学和量子力学中的"多重宇宙"概念.在暴胀宇宙中,可产生巨大数量的时空区域,这些区域不仅彼此脱离因果联系,且其中所展现的物理有效理论也可能是不同的.根据量子力学中的多世界诠释,世界在每次量子测量时根据其不同结果而分裂为不同的、各自独立演化的分支,至于这些分支是否"真实存在"取决于对"存在"的理解,因而更多的是个哲学而非科学问题.由于多重宇宙的概念很难被实验或观测所检验,因此它是否是一个科学上有意义的概念也是一个有争论的问题.Is ours the only universe？ In this article I review how the idea of ＂multiverse＂ in cosmology and quantum theories. Vast space-time were generated during inflation, for which the observable part is limited by horizon and only a tiny small fraction of the whole, and different effective physical laws may be found in the different parts. In quantum mechanics, according to the many world interpretation, during each quantum measurement the world split into different branches which evolve independently. However, whether such different branches should be considered ＂really exist＂ is more a question of philosophy than science. The concept of multiverse is however almost impossible to be tested with experiments or observations, thus raising the question whether they are meaningful science questions at all.

关 键 词：多重宇宙 暴胀 人择原理 量子力学多世界诠释 

分 类 号：P159[天文地球—天文学]