期刊
UNIVERSE
卷 9, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/universe9100445
关键词
universes; birth; death; rebirth; permanently
This passage describes a scenario about the origin and evolution of the universe, suggesting that the universe undergoes a cycle of birth and death in both Lorentzian and Euclidean spacetime.
In the almost empty universe (with almost no matter in it), stochastic gravitational waves (SGW) of finite amplitude produce a de Sitter regime as a solution, which is invariant with respect to the Wick rotation. Asymptotically, super horizon SGWs do not feel difference between Lorentzian and Euclidean spacetime and belong simultaneously to both of them. The universe is finishing its evolution in Euclidean spacetime, i.e., it disappears into nothing. Quantum fluctuations of the gravitational field (gravitons) produce a de Sitter regime again in Euclidean spacetime where the current universe finished its existence, and due to the invariance of the de Sitter regime with respect to Wick rotation, the next universe starts its life with de Sitter inflation in Lorentzian spacetime. Such a scenario assumes that a permanent process of birth, death and rebirth of an infinite sequence of universes takes place on an infinite time axis.
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