The Copernican principle in compact space–times
The Copernican principle in compact space–times
复制标题
DOI：
10.1046/j.1365-2966.2003.07117.x
复制
发表时间：
2003-04
影响因子：
4.8
通讯作者：
J. Barrow;J. Levin
中科院分区：
文献类型：
--
作者：
J. Barrow;J. Levin
哥白尼意识到我们并不是宇宙的中心。一个通过拓扑标识而变得有限的宇宙引入了一个新的哥白尼式的考虑：虽然我们可能不在宇宙的几何中心，但某些星系可能在。一个有限的宇宙也挑选出一个优选的框架：宇宙最小的框架。虽然我们不太可能处于宇宙的中心，但我们必须生活在首选框架中（如果我们相对于宇宙膨胀处于静止状态）。我们证明了在均匀各向同性的宇宙时空中，首选拓扑框架也必须是共动框架。本文还讨论了拓扑识别时间的一些意义。
Copernicus realized that we are not at the centre of the Universe. A universe made finite by topological identifications introduces a new Copernican consideration: while we may not be at the geometric centre of the Universe, some galaxy could be. A finite universe also picks out a preferred frame: the frame in which the universe is smallest. Although we are not likely to be at the centre of the Universe, we must live in the preferred frame (if we are at rest with respect to the cosmological expansion). We show that the preferred topological frame must also be the comoving frame in a homogeneous and isotropic cosmological space-time. Some implications of topologically identifying time are also discussed.