论文标题
封闭的宇宙：de Sitter Cosmic Gate
A Closed Universe: de Sitter Cosmic Gate
论文作者
论文摘要
引入了与一般相对性中虫洞的概念类似的一个新的宇宙学对象。当虫洞通过时空中的隧道连接两个遥远的点时，这个新对象通过大嘴连接两个时空，该嘴被称为“宇宙门”。在这种情况下，De Sitter时空的常规部分的两个相同的副本通过及时的超平面切割。然后，它们粘在形成完整时空的相同边界（唯一的边界）上。还研究了宇宙门与线性径向扰动的稳定性。最后，提出了时空和无效粒子的时空的径向测量学。
A new cosmological object in analogy with the concept of a wormhole in general relativity is introduced. As wormholes connect two distant points through a tunnel in spacetime, this new object connects two spacetime through a large mouth which is referred to as a "Cosmic Gate". In this context, two identical copies of the regular part of the de Sitter spacetime are cut through a timelike hyperplane. Then, they are glued at their identical boundaries (the only boundary) to form a complete spacetime. The stability of the cosmic gate against a linear radial perturbation is studied as well. Finally, the radial geodesics of the spacetime for a timelike and a null particle are presented.
